Preparation of a Ni/LaAlO3 Catalyst and its Application in Catalytic Pyrolysis of Soybean Straw for Syngas Production
作者：
Li, Zeshan* ;He, Weitao;Xiong, Tao;Wang, Yan;Zhang, Juanjuan;...
期刊：
BIORESOURCES ,2020年15(3):5871-5885 ISSN：1930-2126
通讯作者：
Li, Zeshan
作者机构：
[He, Weitao; Guo, Chaoqiang; Shang, Shuang; Li, Jianfen; Lan, Kui; Xiong, Tao; Zhang, Yiran; Li, Zeshan; Wang, Yan; Zhang, Juanjuan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
通讯机构：
[Li, Zeshan] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
关键词：
Catalytic pyrolysis;LaAlO3;Soybean straw;Syr/gas
摘要：
A LaAlO3 carrier was prepared via the sol-gel method, and a Ni/LaAlO3 catalyst was prepared via the homogeneous precipitation method; this catalyst was used for the catalytic pyrolysis of soybean straw for syngas (H2 + CO) production. The analysis of the raw materials (straw) was performed via elemental analysis and industrial analysis. The support and catalyst were characterized and analyzed by X-ray fluorescence spectroscopy, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, and N2 adsorption-desorption isotherms. The results illustrated that the NiO was uniformly loaded on the LaAlO3 surface. Furthermore, the effects of the Ni loading amount, pyrolysis temperature, holding time, and calcination temperature on the performance of the catalyst were studied. The results showed that the catalyst had the highest increase in production and concentration of H2 and CO when the Ni loading was 10 wt%, the calcination temperature was 500 °C, the reaction temperature was 800 °C, and the holding time was 20 min. Compared with the pyrolysis of straw without a catalyst, the yield of H2 and CO increased from 85 mL/g and 125 mL/g to 238.5 mL/g and 255 mL/g, respectively, and the concentration of H2 and CO increased from 23.5 vol% and 29.4 vol% to 43.1 vol% and 41.9 vol%, respectively. © 2020, North Carolina State University.
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英文
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Synthesis, crystal structure, phosphate hydrolysis activity and antibacterial activity of macrocyclic dinuclear Zn(II) complex with benzyl pendant-arms
作者：
Kou, Huizhi;Wang, Yang;Ding, Peipei;Cheng, Xianzhong;Zhou, Guoqing*
期刊：
Journal of Molecular Structure ,2020年1216:128299 ISSN：0022-2860
通讯作者：
Zhou, Guoqing
作者机构：
[Wang, Yang; Cheng, Xianzhong; Ding, Peipei; Zhou, Guoqing; Kou, Huizhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
通讯机构：
[Zhou, Guoqing] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
关键词：
Macrocyclic dinuclear;Crystal structure;Phosphate ester hydrolysis;Weak intermolecular interactions;Antibacterial activity
摘要：
A new macrocyclic dinuclear Zn(II) complex is synthesized by the cyclocondensation between 3,3 '(ethane-1,2-diylbis (benzylazanediyl))bis(methylene) bis (2-hydroxy-5-methyl-benzaldehyde) and 1,3-diaminopropane and the subsequent with zinc salts. The as-prepared complex is characterized by elemental analysis, FT-IR, ES-MS and single crystal X-ray diffraction. The complex consists of one independent molecular unit of [Zn-2(mu-OAC)L](+) ClO4- and two water molecules with one on a symmetry element. Four of these units collectively form two pairs of dinuclear complex units of [Zn-2(mu-OAc)L](+) with one unit sharing two perchlorate ions and one water molecule and the other unit sharing two perchlorate ions and one symmetry equivalent water molecule. Each zinc(II) ion exhibits a slightly distorted square pyramidal geometry. Two Zn atoms are bridged by two oxygen atoms of an acetate anion and two phenolic O atoms. The Zn-Zn distance is 2.951 angstrom. An ordered two-dimensional network is formed by weak intermolecular interactions in the crystal structure of the complex. The phosphate ester hydrolysis activity and the antibacterial activity of the complex are studied. The results showed that the synthesized complex has an ef ficient catalytic activity of phosphoester bond cleavage and the potential to inhibit the growth of E. coli . The optimum catalytic rate constant (k(cat)) at pH 7.8 for the hydrolysis of 4nitrophenyl phosphate disodium salt hexahydrate (pNPP) by the synthesized complex is 2.98 x 10(-4) s(-1) , and 10(5) times faster than that the spontaneous hydrolysis of the phosphate monoester. Published by Elsevier B.V.
语种：
英文
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Metal-organic framework-derived synthesis of MoO2-Cu@NC nanocomposites for enhanced lithium storage properties
作者：
Liu, Zhenghao;Yao, Mengzhi;Wang, Yourong* ;Liang, Youcai;Li, Yuhan;...
期刊：
International Journal of Electrochemical Science ,2020年15(5):4242-4251 ISSN：1452-3981
通讯作者：
Wang, Yourong;Cheng, Siqing
作者机构：
[Liang, Youcai; Wang, YR; Cheng, SQ; Wang, Yourong; Cheng, Siqing; Yao, Mengzhi; Liu, Zhenghao; Li, Yuhan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Innovat Ctr Nanomat Energy & Med ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, YR; Cheng, SQ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Innovat Ctr Nanomat Energy & Med ICNEM, Wuhan 430023, Hubei, Peoples R China.
关键词：
Folic acid;Lithium ion batteries;Metal organic framework (MOF);MoO2
摘要：
As advanced electrode materials for lithium ion batteries, the application of molybdenum dioxide (MoO2) is hampered by poor cycle stability and rate performance. In this work, a novel Mo/Cu metal organic framework (MOF) has been synthesized using nitrogen-rich folic acid (FA) as an organic ligand through liquid-phase method for the first time at room temperature. After a simple annealing treatment, MoO2-Cu@nitrogen-doped carbon (NC) nanomaterials derived from the Mo/Cu based MOF were obtained, which exhibit excellent performance as the anode material for lithium-ion batteries. The reversible discharge capacity of MoO2-Cu @NC nanocomposites exceeds 1000 mAh g-1 at 100 mA g-1, which remains 846 mAh g-1 after 100 cycles. Meanwhile, the obtained MoO2-Cu@NC nanocomposites also show good rate performance (580 mAh g-1 at 1000 mA g-1). © 2020 The Authors. Published by ESG (www.electrochemsci.org). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
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英文
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Hydrogen-rich Syngas Production via Catalytic Gasification of Biomass Using Ni/Zr-MOF Catalyst
作者：
Shang, Shuang;Qin, Zhenhua;Lan, Kui;Wang, Yan;Zhang, Juanjuan;...
期刊：
BIORESOURCES ,2020年15(1):1716-1731 ISSN：1930-2126
通讯作者：
Li, Jianfen
作者机构：
[Shang, Shuang; He, Weitao; Li, Jianfen; Lan, Kui; Qin, Zhenhua; Xiong, Tao; Wang, Yan; Zhang, Juanjuan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
通讯机构：
[Li, Jianfen] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
关键词：
Biomass;Catalyst;Gasification;Syngas;Zr-MOF
摘要：
A Ni/Zr-MOF catalyst supported on Zr-metal organic framework (Zr-MOF) was prepared by a homogeneous precipitation method and was used in the co-gasification of wet sludge and straw. The Ni/Zr-MOF catalyst was characterized via thermogravimetric, X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry, and Brunauer-Emmett-Teller analyses. The experimental results illustrated that the Zr-MOF crystals were an octahedral structure with a specific surface area of 806 m2/g, and had mesoporous structure. Nickel was uniformly dispersed on the surface of the catalyst, and most of the Ni/Zr-MOF crystals maintained an octahedral morphology. Compared with non-catalyst biomass gasification, the H2 yield increased from 0.39 mol/kg to 11.87 mol/kg using the Ni/Zr-MOF catalyst at 500 °C. After 10 instances of reuse, the H2 yield was still as high as 10.11 mol/kg. The Ni/Zr-MOF catalyst exhibited high catalytic activity and stability for biomass gasification at low-temperature. © 2020, North Carolina State University.
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英文
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Dielectric Properties of CF3SO2F/N-2 and CF3SO2F/CO2 Mixtures as a Substitute to SF6
作者：
Hu, Shizhuo;Wang, Yi;Zhou, Wenjun* ;Qiu, Rui;Luo, Yunbai;...
期刊：
Industrial & Engineering Chemistry Research ,2020年59(35):15796-15804 ISSN：0888-5885
通讯作者：
Zhou, Wenjun
作者机构：
[Hu, Shizhuo; Zhou, Wenjun; Qiu, Rui] Wuhan Univ, Sch Elect Engn & Automat, Wuhan 430072, Hubei, Peoples R China.;[Wang, Yi; Luo, Yunbai; Wang, Baoshan] Wuhan Univ, Coll Chem & Mol Sci, Minist Educ, Engn Res Ctr Organosilicon Cpds & Mat, Wuhan 430072, Hubei, Peoples R China.;[Wang, Yi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Zhou, Wenjun] W;Wuhan Univ, Sch Elect Engn & Automat, Wuhan 430072, Hubei, Peoples R China.
摘要：
CF 3 SO 2 F (trifluoromethanesulfonyl fluoride) is a novel substitute to SF 6 . The AC breakdown tests of pure CF 3 SO 2 F, CF 3 SO 2 F/N 2 , and CF 3 SO 2 F/CO 2 mixtures in a slightly non-uniform electric field were done. The effects of pressure, electrode distance, and mixing ratio on the breakdown characteristics of the CF 3 SO 2 F mixtures were obtained and compared with SF 6 . In order to investigate the micromechanism of dielectric properties, the structures of CF 3 SO 2 F, N 2 , and CO 2 and their bimolecular complexes were determined based on density functional theory (DFT). The differences in dielectric properties between the CF 3 SO 2 F/N 2 and CF 3 SO 2 F/CO 2 mixtures were analyzed. The results show that the breakdown strength of the 40%CF 3 SO 2 F/N 2 and 45%CF 3 SO 2 F/CO 2 mixtures are equivalent to SF 6 , whereas the CF 3 SO 2 F/N 2 mixture is better than the CF 3 SO 2 F/CO 2 mixture. The reason is that both the ionization energy and the enhancement to the most easily dissociated 1S–2C chemical bond of CF 3 SO 2 F···N 2 complex are greater than those of the CF 3 SO 2 F···CO 2 complex, which helps the CF 3 SO 2 F/N 2 mixture to maintain a higher insulation level.
语种：
英文
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Template-Directed Synthesis of Two Dinuclear Ni(II) Complexes together with Their Interconversion, Crystal Structures and DNA-Binding Studies
作者：
Wang, Yang;Wu, Zhongyuan;Liu, Yuxiu;Liu, Yulan;Qiu, Yinsheng;...
期刊：
ChemistrySelect ,2020年5(46):14703-14712 ISSN：2365-6549
通讯作者：
Cheng, Xianzhong
作者机构：
[Wang, Yang; Cheng, Xianzhong; Liu, Yulan; Qiu, Yinsheng; Zhou, Guoqing; Wu, Zhongyuan] Wuhan Polytech Univ, Hubei Collaborat Innovat Ctr Anim Nutr & Feed Saf, Hubei Key Lab Anim Nutr & Feed Sci, Wuhan 430023, Peoples R China.;[Wang, Yang; Cheng, Xianzhong; Yan, Juntao; Liu, Yuxiu] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
通讯机构：
[Cheng, Xianzhong] W;Wuhan Polytech Univ, Hubei Collaborat Innovat Ctr Anim Nutr & Feed Saf, Hubei Key Lab Anim Nutr & Feed Sci, Wuhan 430023, Peoples R China.;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
摘要：
<jats:title>Abstract</jats:title><jats:p>Dinuclear Ni(II) macrocyclic complex <jats:bold>A</jats:bold> ([Ni<jats:sub>2</jats:sub>L<jats:sup>1</jats:sup>OAc]ClO<jats:sub>4</jats:sub>⋅CH<jats:sub>3</jats:sub>OH⋅H<jats:sub>2</jats:sub>O) and dinuclear Ni(II) acyclic complex <jats:bold>B</jats:bold> ([Ni<jats:sub>2</jats:sub>L<jats:sup>2</jats:sup>](ClO<jats:sub>4</jats:sub>)<jats:sub>2</jats:sub>) were synthesized by condensation between H<jats:sub>2</jats:sub>L (3,3′‐(ethane‐1,2‐diylbis(benzylazanediyl))bis(methylene)bis(2‐hydroxy‐5‐methyl‐benzaldehyde)) and different molar equivalent 1,3‐propanediamine in the presence of Ni(II) ions. The structures of complexes were characterized by IR spectroscopy, elemental analysis, electrospray mass spectra and X‐ray single crystal diffraction. In complex <jats:bold>A</jats:bold>, the Ni(II)‐Ni(II) distance was 2.9413(7) Å, bridged by two phenolic oxygens and an acetate anion, while in complex <jats:bold>B</jats:bold>, it was 3.0540(1) Å, only bridged by two phenolic oxygens. The calf thymus DNA (CT‐DNA) binding ability was studied through spectroscopic and electrochemical methods, the corresponding binding constant for complexes <jats:bold>A</jats:bold> and <jats:bold>B</jats:bold> were 6.45×10<jats:sup>4</jats:sup> M<jats:sup>−1</jats:sup> and 8.65×10<jats:sup>4</jats:sup> M<jats:sup>−1</jats:sup>, respectively. The MS revealed that <jats:bold>B</jats:bold> can transform to <jats:bold>A</jats:bold> by adding more H<jats:sub>2</jats:sub>L, and <jats:bold>A</jats:bold> cannot transform to <jats:bold>B</jats:bold> in the presence of excess 1,3‐propanediamine.</jats:p>
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A Facile Synthesis of Three Dimensional β-Ni(OH)2 Composed of Ultrathin Nanosheets for High Performance Pseudocapacitor
作者：
Qin, Zhenhua;Wang, Yan;Huang, Xiaoman;Shen, Wenjuan;Yu, Jiuhong;...
期刊：
Journal of Inorganic and Organometallic Polymers and Materials ,2020年30(6):2089-2097 ISSN：1574-1443
通讯作者：
Li, Jianfen
作者机构：
[Yu, Jiuhong; Huang, Xiaoman; Li, Jianfen; Qin, Zhenhua; Shen, Wenjuan; Wang, Yan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Li, Jianfen] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
Capacitance;Chlorine compounds;High resolution transmission electron microscopy;Nickel compounds;Phase structure;Scanning electron microscopy;Spectrometers;Supercapacitor;Electrochemical activities;Hierarchical;Hydrolytic process;Scanning electrons;Specific capacitance;Thermal gravimetric;Ultrathin nanosheets;X ray photoelectron spectrometers;Nanosheets
摘要：
Hierarchical β-Ni(OH)2 nanostructures composed of ultrathin nanosheets were synthesized via a hydrolytic process of nickel chloride. The obtained samples were characterized by X-ray diffraction, thermal gravimetric, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectrometer. The corresponding results show that the Ni(OH)2 has a β-phase structure, and the hierarchical β-Ni(OH)2 nanostructures are made up of several cross-linked nanosheets, and the thickness of the nanosheets is only 9.3nm. The ultrathin nanosheets provide a very short diffusion channel for ion migration, which is beneficial to improve the electrochemical activity of the sample. The ultrathin β-Ni(OH)2 nanosheets aggregates have a specific capacitance of 1727 F/g at a current density of 1 A/g. Increasing the current density to 20 A/g, the specific capacitance can still maintain at 1235 F/g. Importantly, after 1000 charge–discharge cycles, the results show that the loss of the specific capacitance is only 1.6% at 1 A/g, and the loss is 27.9% at 20 A/g. The excellent performances of β-Ni(OH)2 nanostructures used as pseudocapacitors reveal the great potential of ultrathin nanosheets materials in energy storage. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
语种：
英文
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Synthesis of heterobinuclear Cu(Ⅱ)-Ni(Ⅱ) complex: Structure, CT-DNA interaction, hydrolytic function and antibacterial studies
作者：
Ding, Peipei;Wang, Yang;Kou, Huizhi;Li, Jianfen;Shi, Baoxian*
期刊：
Journal of Molecular Structure ,2019年1196:836-843 ISSN：0022-2860
通讯作者：
Shi, Baoxian
作者机构：
[Wang, Yang; Li, Jianfen; Ding, Peipei; Shi, Baoxian; Kou, Huizhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Shi, Baoxian] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
Binding energy;DNA;Hydrolysis;Mass spectrometry;Single crystals;Spectroscopic analysis;X ray diffraction;Absorption and emissions;Anti-bacterial activity;Anti-bacterial studies;Antibacterial properties;DNA binding;Heterbinuclear complex;Single crystal x-ray diffraction;Template-directed synthesis;Complexation
摘要：
A new benzyls pendant-armed macrobicyclic heterbinuclear Cu(Ⅱ)-Ni(Ⅱ) complex has been obtained by template-directed synthesis and characterized by elemental analysis, IR spectra, electrospray mass spectra, and single crystal X-ray diffraction. The complex was bridged by two phenolic oxygens and an acetate radical, with the Cu(Ⅱ)-Ni(Ⅱ) distance of 2.9292(8) Å. The hydrolytic function, CT-DNA binding and antibacterial properties were also studied. The initial rate values for the hydrolysis of 4-nitophenylphosphate to 4-nitrophenolate by the Cu(Ⅱ)-Ni(Ⅱ) complex was 1.33 × 10−5 s−1, and 104 times faster than that the spontaneous hydrolysis of the phosphate monoester. The complex shows a better binding property to CT-DNA and the intrinsic binding constant is 1.29 × 105 M−1. The Stern-Volmer constant is 1.25 × 105 M−1. The viscosity increased obviously with the increase of complex concentration, the results showed that the complex bind to DNA through intercalation mode, which was in accordance with the absorption and emission spectral studies. The antibacterial activities against E.coli was also investigated using the Gentamycinas reference system. © 2019
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英文
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A new macrocyclic heterobinuclear Cu(II)-Zn(II) complex: synthesis, crystal structure, phosphate hydrolysis, and DNA binding studies
作者：
Kou, Huizhi;Wang, Yang;Ding, Peipei;Li, Jianfen;Shi, Baoxian*
期刊：
Journal of Coordination Chemistry ,2019年72(10):1683-1696 ISSN：0095-8972
通讯作者：
Shi, Baoxian
作者机构：
[Kou, Huizhi; Wang, Yang; Ding, Peipei; Li, Jianfen; Shi, Baoxian] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan, Hubei, Peoples R China
通讯机构：
[Shi, Baoxian] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan, Hubei, Peoples R China.
关键词：
Macrocyclic heterobinuclear;crystal structure;phosphate ester hydrolysis;DNA binding;viscosity
摘要：
A new macrocyclic heterobinuclear Cu(II)-Zn(II) complex was synthesized and characterized by elemental analysis, FT-IR, ES-MS, and single-crystal X-ray diffraction. Five-coordinate geometry for the new complex is proposed. The copper…zinc distance bridged by two phenolic oxygens and a acetate ligand is 2.9508 Å. The phosphate ester hydrolysis activity and the DNA binding ability of the complex were studied. The results showed that the present complex has an efficient catalytic activity of phosphoester bond cleavage. The catalytic rate constant kcat for the hydrolysis of 4-nitrophenyl phosphate disodium salt hexahydrate (pNPP) by the synthesized complex is 2.69 × 10−4 s−1 and 105 times faster than the spontaneous hydrolysis of the phosphate monoester. The complex shows a good binding ability to calf thymus (CT-DNA) and the corresponding binding constant is 1.9 × 105 M−1. The linear Stern-Volmer quenching constant obtained by the fluorescent spectroscopic is 6.3 × 104 M−1. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.
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英文
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Synthesis, Characterization of a Baicalin-Strontium(II) Complex and Its BSA-Binding Activity
作者：
Wang, Yang;Xiong, Chunhong;Wu, Zhongyuan;Liu, Yulan;Qiu, Yinsheng;...
期刊：
ChemistrySelect ,2019年4(45):13079-13088 ISSN：2365-6549
通讯作者：
Zhou, Guoqing
作者机构：
[Wang, Yang; Cheng, Xianzhong; Liu, Yulan; Qiu, Yinsheng; Zhou, Guoqing; Wu, Zhongyuan; Xiong, Chunhong] Wuhan Polytech Univ, Hubei Collaborat Innovat Ctr Anim Nutr & Feed Saf, Hubei Key Lab Anim Nutr & Feed Sci, Wuhan 430023, Peoples R China.;[Wang, Yang] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
通讯机构：
[Zhou, Guoqing] W;Wuhan Polytech Univ, Hubei Collaborat Innovat Ctr Anim Nutr & Feed Saf, Hubei Key Lab Anim Nutr & Feed Sci, Wuhan 430023, Peoples R China.
关键词：
Baicalin-Sr(II) complex;Binding ability;BSA;Spectrometry;Synthesis
摘要：
<jats:title>Abstract</jats:title><jats:p>Baicalin is one of the major bioactive constituents of <jats:italic>Scutellaria baicalensis Georgi</jats:italic>, possessed anti‐inflammation, antimicrobial and anticancer activity, has been attained extensive attention. In the present work, a new baicalin‐Sr(II) complex (Sr[baic]⋅3H<jats:sub>2</jats:sub>O) was synthesized to enhance its biological activity. A series of experiments were carried out to give the satisfying reaction conditions: pH=8.3 and the molar ratio of L:M ≤ 1:1. The obtained complex Sr[baic]⋅3H<jats:sub>2</jats:sub>O was characterized by IR, ES‐MS UV‐vis, atomic absorption, elemental analysis and thermogravimetric analysis. The interactions between baicalin/Sr[baic] and bovine serum albumin were also researched through fluorescence spectrum, which accord with the static quenching mechanism, Sr[baic] has higher binding ability than baicalin. Thermodynamic parameters ΔG°<0, ΔH°<0 and ΔS°>0, indicated that electrostatic forces is the major interaction forces in Sr[baic]‐bovine serum albumin system. Furthermore, the synchronous fluorescence experiments were carried out. The studies revealed that both baicalin and Sr[baic] quench the intrinsic fluorescence of bovine serum albumin, and the possible binding site is located on Trp residues. In circular dichroism spectrum, the binding of baicalin and Sr[baic] to bovine serum albumin lead to a loss in helical stability, by contrast, Sr[baic] increases baicalin's binding ability.</jats:p>
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Catalytic Conversion of Glucose to 5-(Hydroxymethyl)furfural Over Phosphotungstic Acid Supported on SiO2-Coated Fe3O4
作者：
Wang, Yuexin;Hu, Zongxiao;Fan, Guozhi* ;Yan, Juntao;Song, Guangsen;...
期刊：
Waste and Biomass Valorization ,2019年10(8):2263-2271 ISSN：1877-2641
通讯作者：
Fan, Guozhi;Li, Jianfen
作者机构：
[Hu, Zongxiao; Wang, Yuexin; Li, Jianfen; Fan, Guozhi; Song, Guangsen; Yan, Juntao] Wuhan Polytech Univ, Sch Chem & Environm Engn, 68 South Xuefu Rd, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Fan, GZ; Li, JF] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, 68 South Xuefu Rd, Wuhan 430023, Hubei, Peoples R China.
关键词：
Glucose;5-(Hydroxymethyl)furfural;Phosphotungstic acid;Fe3O4;SiO2
摘要：
Abstract: There is a significant interest in valorization of biomass and its derivatives into chemicals. In this work, glucose derived from biomass was converted into 5-(hydroxymethyl)furfural (HMF). Phosphotungstic acid (PHA) supported on magnetic nanoparticles Fe3O4 coated by SiO2 (Fe3O4@SiO2/PHA) was prepared and employed in the synthesis of HMF from glucose. The supported catalyst of Fe3O4@SiO2/PHA was characterized by infrared spectroscopy (IR) and powder X-ray diffraction. The results indicated that the supported catalyst exhibited similar catalytic activity to that of homogeneous PHA. The effects of such reaction variables as the amount of PHA, reaction solvent, temperature and time were studied in detail. The yield of HMF at 30.4% was observed at 130 °C for 3 h in N,N-dimethylformamide under nitrogen atmosphere. The supported catalyst was recovered by an external magnet after the reaction and reused in the next run without further pretreatment. No significant change in activity was observed at the initial four cycles, in which the yield of HMF changed in a small range from 28.7 to 30.8%. Graphical Abstract: [Figure not available: see fulltext.]. © 2018, Springer Science+Business Media B.V., part of Springer Nature.
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英文
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Preparation of convertible cellulose from rice straw using combined organosolv fractionation and alkaline bleaching
作者：
Luo, Kehui;Wang, Yuexin;Xiao, Huzong;Song, Guangsen;Cheng, Qunpeng;...
期刊：
IOP Conference Series: Earth and Environmental Science ,2019年237(5):052053 ISSN：1755-1307
通讯作者：
Fan, Guozhi
作者机构：
[Wang, Yuexin; Cheng, Qunpeng; Song, Guangsen; Luo, Kehui; Fan, Guozhi; Xiao, Huzong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Fan, Guozhi] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
会议名称：
2018 4th International Conference on Advances in Energy Resources and Environment Engineering, ICAESEE 2018
会议时间：
7 December 2018 through 9 December 2018
会议地点：
Chengdu, PEOPLES R CHINA
会议主办单位：
[Luo, Kehui;Wang, Yuexin;Xiao, Huzong;Song, Guangsen;Cheng, Qunpeng;Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
关键词：
Bleaching;Cleaning;Energy resources;Lignin;Organic solvents;Silica;Sodium Carbonate;Sodium compounds;Sustainable development;Cellulose content;Microcrystalline cellulose;Mixed solution;Mixed solvent;Organosolv fractionations;Removal rate;Rice straws;X ray diffractometers;Cellulose;Bleaching;Cleaning;Silica;Sodium Carbonate;Sodium Compounds
摘要：
Rice straw was employed to prepare microcrystalline cellulose (MCC). First, crude cellulose was isolated from rice straw using organosolv fractionation in the presence of mixed solvent composed of ethanol and H2O. Most hemicellulose and lignin were removed while little silica was not. Second, crude cellulose was bleached in Na2CO3/H2O2 mixed solution to remove residual silica as well as small amount of hemicellulose and lignin. After that, the removal rates of hemicellulose, lignin and silica reached up 91.5, 92.8 and 97.9%, respectively. Cellulose from rice straw was further converted into MCC in the presence of hydrochloric acid aqueous solution, and the cellulose content reached up to 92.4% in MCC. Infrared spectrometer (IR) and X-ray diffractometer (XRD) were used to characterize the structure of rice straw and its derived samples. © 2019 Institute of Physics Publishing. All rights reserved.
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英文
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Precursor-template strategy toward hollow nanostructured Li(Ni1/3Co1/3Mn1/3)O2 Microspheres cathode with enhanced electrochemical performance
作者：
Kang, Zhenya;Wang, Yourong* ;Yao, Mengzhi;Cheng, Siqing*
期刊：
International Journal of Electrochemical Science ,2018年13(7):6771-6778 ISSN：1452-3981
通讯作者：
Wang, Yourong;Cheng, Siqing
作者机构：
[Kang, Zhenya; Wang, YR; Cheng, SQ; Wang, Yourong; Cheng, Siqing; Yao, Mengzhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, YR; Cheng, SQ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
关键词：
Li(Ni1/3Co1/3Mn1/3)O-2 ( NCM);Precursor template;cathode materials;Lithium ion batteries (LIBs);Electrochemical performance
摘要：
The hollow nanostructured Li(Ni1/3Co1/3Mn1/3)O2 (NCM) microspheres with low Li/Ni disorder were fabricated by precursor-template approach and investigated electrochemically as lithium ion batteries (LIBs) cathode. The as-obtained NCM microspheres cathode exhibits high specific capacity, good coulombic efficiency and outstanding rate capability. This might mainly be due to the unique hollow nanostructured architectures of the NCM microspheres enabling to shorten Li+ diffusion and electron transportation paths in the materials, which is verified via the cyclic voltammetry (CV) at various scan rate to obtain the high apparent Li+ diffusion coefficient for the discharge/charge processes. © 2018 Published by ESG.
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英文
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Synthesis, Characterization, and Performance Evaluation of Sulfur-Containing Diphenylamines Based on Intramolecular Synergism
作者：
He, Jun-Bo;Shi, Hao;Wang, Yue;Gao, Xin-Lei*
期刊：
Molecules ,2018年23(2):401 ISSN：1420-3049
通讯作者：
Gao, Xin-Lei
作者机构：
[He, Jun-Bo; Shi, Hao] Wuhan Polytech Univ, Coll Food Sci & Engn, Minist Educ, Key Lab Deep Proc Major Grain & Oil, Wuhan 430023, Hubei, Peoples R China.;[Wang, Yue; Gao, Xin-Lei] Wuhan Polytech Univ, Dept Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Gao, Xin-Lei] W;Wuhan Polytech Univ, Dept Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
acetamide derivative;antioxidant;diphenylamine;lubricating agent;sulfur;tricarboxylic acid;trimellitic acid;analogs and derivatives;chemistry;friction;materials testing;oxidation reduction reaction;synthesis;Acetamides;Antioxidants;Diphenylamine;Friction;Lubricants;Materials Testing;Oxidation-Reduction;Sulfur;Tricarboxylic Acids
摘要：
To obtain novel structural antioxidants that have different antioxidant mechanisms, four 2-(alkylthio)-N-(4-(phenylamino)phenyl)acetamides 2a–d as dual functional antioxidants are designed, synthesized, and confirmed by 1H-NMR, FTIR, MS, and elemental analysis. The antioxidant behavior of compounds 2a–d as additives of base oil triisodecyl trimellitate (TIDTM) is evaluated by non-isothermal and isothermal DSC analyses. The results showed all compounds can greatly increase the incipient oxidation temperature (IOT) and oxidation induction time (OIT) of TIDTM, especially, compound 2c exhibited an OIT value of 72.5 min at 230 ◦C, which is almost 28 times the length of TIDTM. Moreover, compounds 2a–d do not affect the tribological performance of TIDTM. The mechanism of antioxidants involved an intramolecular synergism are proposed. This work demonstrates compound 2c can be used as a novel potential antioxidant additive of TIDTM; in addition, it would inspire the emergence of highly potent antioxidants with different antioxidant mechanisms. © 2018 by the authors.
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英文
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Synthesis of cyclic carbonate via the coupling reaction of carbon dioxide with epoxide at ambient pressure
作者：
Hu, Zongxiao;Fan, Guozhi* ;Wang, Yuexin;Li, Jianfen;Song, Guangsen
期刊：
Greenhouse Gases: Science and Technology ,2018年8(3):570-579 ISSN：2152-3878
通讯作者：
Fan, Guozhi
作者机构：
[Hu, Zongxiao; Wang, Yuexin; Li, Jianfen; Song, Guangsen; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Fan, Guozhi] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
CO2;epoxide;cyclic carbonate;ambient pressure;ZnBr2;Bu4NBr
摘要：
Cyclic carbonates were synthesized via the coupling reaction of CO2 with epoxides at ambient pressure. The reaction of atmospheric pressure CO2 with styrene oxide (SO) was selected as the model reaction. The coupling reaction was investigated by varying a simple catalytic system composed of Lewis acid and quaternary ammonium salt, molar ratio of catalyst to substrate, solvent, and temperature. The yield of styrene carbonate (SC) reached 91.5% in the presence of ZnBr2/Bu4NBr at p(CO2)° = 0.1 MPa and 100°C for 4 h. The coupling reactions between CO2 and a series of substrates including aliphatic and aromatic epoxides were also performed efficiently. Yields of cyclic carbonates in the range of 76.4–93.2% were achieved. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.
语种：
英文
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TiCl_4处理对纳米结构SrTiO_3薄膜及染料敏化太阳能电池性能的影响
作者：
寇慧芝;杨术明;王洋;闫俊涛
期刊：
功能材料 ,2018年49(5):5023-5027 ISSN：1001-9731
通讯作者：
Yan, J.
作者机构：
[闫俊涛; 寇慧芝; 王洋] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, China;[杨术明] College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, China
通讯机构：
[Yan, J.] S;School of Chemical and Environmental Engineering, China
关键词：
染料敏化太阳能电池;TiCl4处理;光谱电化学;自由电子密度;陷阱态;短路光电流
摘要：
研究了TiCl_4处理对纳米结构SrTiO_3薄膜电极及染料敏化太阳能电池的影响。与未处理SrTiO_3电极相比,TiCl_4处理后的电极能够吸附更多的染料。采用时间分辨电流的方法研究了两种电极的陷阱态分布。在0.2mol/L高氯酸四丁基铵(TBAP)和0.5mol/L高氯酸乙酰丙酮溶液中,未处理SrTiO_3电极和TiCl_4处理电极的陷阱态密度分别为2.85×10~(16)和1.83×10~(16) cm-2。光谱电化学表明TiCl_4处理后SrTiO_3电极导带中自由电子密度增加,暗电流减小,电荷复合减小。测量了N3敏化SrTiO_3电极和TiCl_4处理SrTiO_3电极的光电流电压曲线,发现TiCl_4处理SrTiO_3太阳能电池有较高的光电流密度,这与前面的测试结果相吻合。
语种：
中文
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Reduced graphene oxide -coated 3D interconnected SiO2 nanoparticles with enhanced lithium storage performance
作者：
Guo, Xu;Xie, Kai;Wang, Yourong* ;Kang, Zhengya;Zhou, Wei;...
期刊：
International Journal of Electrochemical Science ,2018年13(6):5645-5653 ISSN：1452-3981
通讯作者：
Wang, Yourong;Cheng, Siqing
作者机构：
[Guo, Xu; Xie, Kai; Wang, YR; Cheng, SQ; Wang, Yourong; Cheng, Siqing; Zhou, Wei; Kang, Zhengya] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, YR; Cheng, SQ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
关键词：
Anode materials;Lithium ion batteries;SiO 2;Sol-gel method
摘要：
3D interconnected SiO2 nanoparticles coated by reduced graphene oxide (rGO) (SiO2@rGO) were fabricated easily by online hydrolysis and subsequent condensation of the precursor tetraethylorthosilicate (TEOS) in the dispersed graphene oxide (GO) sol, followed by the reduction of GO using hydrazine hydrate. The as-obtained 3D interconnected SiO2 nanoparticles coated by rGO composites as anode material for lithium ion rechargeable batteries (LIBs) delivers a reversible discharge capacity of 490.7 mAh g-1 at a current density of 100 mA g-1 after 60 cycles with the coulombic efficiency of nearly 98%. Compared to the bare nano-SiO2, the enhanced lithium storage performance could be attributed to its unique 3D interconnected network space structure to accommodate the volume variation during cycled lithiation/delithiation process. © 2018 The Authors.
语种：
英文
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A facile synthesis of hierarchical MoS2 nanotori with advanced lithium storage properties
作者：
Xie, Kai;Liu, Zhenghao;Wang, Yourong* ;Song, Guangsen;Cheng, Siqing*
期刊：
NEW JOURNAL OF CHEMISTRY ,2018年42(13):10935-10939 ISSN：1144-0546
通讯作者：
Wang, Yourong;Cheng, Siqing
作者机构：
[Xie, Kai; Wang, YR; Cheng, SQ; Wang, Yourong; Cheng, Siqing; Song, Guangsen; Liu, Zhenghao] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, YR; Cheng, SQ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
关键词：
disulfide;lithium;molybdenum complex;molybdenum disulfide;nanorod;nanotube;unclassified drug;Article;cyclic potentiometry;high resolution transmission electron microscopy;lithiation;nanofabrication;precursor;priority journal;scanning electron microscopy;surface property;synthesis;X ray diffraction
摘要：
MoS2 with a 2D layered structure and high theoretical capacity has been regarded as a promising candidate for anode materials in lithium ion batteries. But its poor cyclic stability and low rate capability hinder its practical applications. Herein, hierarchical MoS2 nanotori consisting of MoS2 nanosheets with an increased interlayer distance were synthesized by a facile hydrothermal reaction for the first time. A possible formation mechanism of the hierarchical MoS2 nanotori is proposed based on the scanning electronic microscopy (SEM) results and the influence of the MoO3 precursor on the morphology of the MoS2 obtained. The hierarchical MoS2 nanotori display superior reversible capacity, good rate capability and improved cyclic performance, which can be attributed to their hierarchical surface, hollow structure feature and increased layer distance. The formation mechanism of hierarchical MoS2 nanotori proposed here should offer a new technique for the design and synthesis of MoS2 with different morphologies using MoO3 as the growth template.
语种：
英文
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Hierarchically Porous Carbon Derived from Peanut Shells for High-performance Lithium-sulfur Batteries
作者：
Zhu, Lei;Wang, Yourong* ;Xie, Kai;Song, Guangsen;Cheng, Siqing*
期刊：
Chemistry Letters ,2018年47(2):236-239 ISSN：0366-7022
通讯作者：
Wang, Yourong;Cheng, Siqing
作者机构：
[Zhu, Lei; Xie, Kai; Wang, YR; Cheng, SQ; Wang, Yourong; Cheng, Siqing; Song, Guangsen] Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, YR; Cheng, SQ] W;Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
Lithium-sulfur batteries;Hierarchically porous carbon (HPC);Peanut shell
摘要：
Lithium-sulfur (Li-S) batteries are considered to be a promising energy storage device because of their high theoretical energy density and relatively low cost. But low rate performance and poor cycle stability arising from the poor electronic conductivity and the shuttling of polysulfide intermediates hamper its practical application. In order to address these shortcomings, hierarchically porous carbon (HPC) derived from peanut shells is employed as a host to accommodate sulfur for the first time. As-prepared HPC possesses a hierarchically porous structure with a relatively high specific surface area of 1775.7m2 g-1 and a large pore volume of 1.457 cm3 g-1. When as-prepared HPC was employed as cathode hosts for lithiumsulfur batteries, it was found that S/HPC composite displayed an excellent electrochemical performance. The initial discharge capacity of 1659.8mAh g-1 is reached at 0.5C and a reversible capacity of 815.7mAh g-1 can be maintained after 100 cycles. Even if the current density increases to 3C, the specific capacity still is as high as 736.9mAh g-1. ©2018 The Chemical Society of Japan.
语种：
英文
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Synthesis of 5-hydroxymethyl furfural from cellulose via a two-step process in polar aprotic solvent
作者：
Fan, Guozhi* ;Wang, Yuexin;Hu, Zongxiao;Yan, Juntao;Li, Jianfen;...
期刊：
Carbohydrate Polymers ,2018年200:529-535 ISSN：0144-8617
通讯作者：
Fan, Guozhi
作者机构：
[Hu, Zongxiao; Wang, Yuexin; Li, Jianfen; Song, Guangsen; Yan, Juntao; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Fan, Guozhi] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
5-Hydroxymethyl furfural;Cellulose;Glucose;Phosphotungstic acid;Two-step process
摘要：
The synthesis of 5-hydroxymethyl furfural (HMF) from cellulose via a two-step process was investigated. To optimize reaction conditions, the separate conversion of cellulose and glucose was first performed in tetrahydrofuran (THF) and N, N-dimethylformamide (DMF) via a one-step process using hosphotungstic acid (PHA) as catalyst. The direct conversion of cellulose to HMF was then performed via the two-step process. The first step and the second step were carried out in THF and the mixture solvent composed of THF/DMF, respectively. Cellulose was converted to HMF and glucose in the first step in THF. Both of cellulose and the as-formed glucose were then converted to HMF in the second step. The conversion of cellulose to HMF and glucose were significantly improved by the two-step process, and the total yield of HMF and glucose was elevated from 52.1 to 97.0%. A possible mechanism for the formation of HMF from cellulose via the two-step process was also proposed.
语种：
英文
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