作者： Zhang, Kaidi;Jiang, Meng;Cheng, Qunpeng*;Song, Guangsen;Fan, Guozhi

期刊： ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY,2020年39(1):UNSP e13295 ISSN：1944-7442

通讯作者： Cheng, Qunpeng

作者机构： [Zhang, Kaidi; Cheng, Qunpeng; Song, Guangsen; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Xuefu South Rd 68, Wuhan 430023, Hubei, Peoples R China;[Jiang, Meng; Song, Guangsen] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan, Hubei, Peoples R China

通讯机构： [Cheng, Qunpeng] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Xuefu South Rd 68, Wuhan 430023, Hubei, Peoples R China.

关键词： catalytic cracking;Ni;Ni;Ce;Ni;Fe;toluene

摘要： In this work, three catalysts (Ni-based catalyst, Ni/Fe-based catalyst, and Ni/Ce-based catalyst) were developed for catalytic cracking of toluene as a model compound of tar in a fixed bed reactor. The characteristic of catalysts were determined by XRD, EDX, and BET. Meanwhile, the effects of calcination temperature and reaction temperature on syngas yield and toluene conversion rate were also studied. The results showed that the BET surface area was decreased with the rise of calcination temperature, while the content of hydrogen and syngas yield were decreased with the rise of calcination temperature. The three catalysts showed a promising application in catalytic reforming of toluene for hydrogen production. The catalytic performance of three catalysts was ordered as Ni/Ce > Ni/Fe > Ni > thermal cracking. The maximum syngas yield (1.44 L/g toluene) and toluene conversion rate (96.4%) were obtained for Ni/Ce-based catalyst, which indicated the effectiveness of the Ni/Ce-based catalyst.

语种： 英文

作者： 柴波;闫俊涛;范国枝;宋光森;王春蕾

期刊： 催化学报,2020年(01):190-199 ISSN：0253-9837

作者机构： 武汉轻工大学动物营养与饲料科学湖北省重点实验室;武汉轻工大学化学与环境工程学院

关键词： CdMoO4/g-C3N4复合物;异质结;电荷分离;可见光;光催化活性

摘要： 半导体光催化技术因其能够完全矿化和降解废水以及废气中的各种有机和无机污染物而受到越来越多研究者关注.尽管TiO2作为光催化剂显示了良好的应用前景,但其只对紫外光响应,该部分能量大约仅占太阳光谱的5%,从而限制了其实际应用.因此,开发新型可见光响应光催化剂成为光催化领域的研究焦点之一.石墨相氮化碳（g-C3N4）作为一种光催化材料,由于具有良好的热和化学稳定性以及可见光响应而备受关注.然而,单纯的g-C3N4由于光生电荷载流子易复合,光催化效果并不理想.为进一步提高g-C3N4的光催化活性,构建g-C3N4基异质结复合光催化材料被认为是增强g-C3N4光生电子-空穴分离效率的有效方法. CdMoO4作为一种光催化材料,与g-C3N4匹配的能带有利于光生电子-空穴的分离,从而提高g-C3N4的光催化活性.本文通过便利的原位沉淀-煅烧过程,制备了新颖的Cd MoO4/g-C3N4异质复合光催化材料.复合材料的晶相构成、形貌、表面化学组分和光学特性等通过相应的分析测试手段进行表征.光催化活性通过可见光下催化降解罗丹明B水溶液来评价.结果显示,将CdMoO4沉积在g-C3N4表面形成复合材料可明显提高光催化活性,且当CdMoO4含量为4.8wt%时达到最佳的光催化活性.这种显著增强的光催化活性可能是由于Cd MoO4/g-C3N4复合物能够有效地传输和分离光生电荷载流子,从而抑制了光生电子-空穴的复合.电化学阻抗、瞬态光电流和稳定荧光光谱测试结果证实,通过Cd MoO4与g-C3N4复合可有效增强电荷分离效率.此外,活性物捕获实验表明,在光催化过程中空穴（h+）和超氧自由基（?O2-）是主要活性物种.根据莫托-肖特基实验并结合紫外-可见漫反射吸收光谱,得到了单纯g-C3N4和CdMoO4的能带结构,提出了形成的II型异质结有助于增强光催化活性的机理.

语种： 中文

作者： Shi, Xunwang;Zhang, Kaidi;Cheng, Qunpeng*;Song, Guangsen*;Fan, Guozhi;...

期刊： Vidnovlyuvana Enerhetyka,2019年140:32-38 ISSN：1819-8058

通讯作者： Cheng, Qunpeng;Song, Guangsen

作者机构： [Cheng, Qunpeng; Li, Jianfen; Zhang, Kaidi; Shi, Xunwang; Song, Guangsen; Fan, Guozhi; Song, GS] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430073, Hubei, Peoples R China.

通讯机构： [Cheng, QP; Song, GS] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430073, Hubei, Peoples R China.

关键词： Nickel-iron catalyst;Rape straw;Hydrogen-rich gas;Pyrolysis

摘要： A catalyst loaded Ni-Fe using powder active carbon (PAC) and gamma-Al2O3 as the support was prepared for hydrogen-rich syngas production from rape straw pyrolysis in a two-stage fixed reactor. EDX (Energy dispersive X-ray spectroscopy), SEM (Scanning electron microscope) and N-2 isothermal adsorption desorption were used to characterize the catalysts. The results showed that the support of PAC-gamma Al2O3 was uniform with large specific surface area. The metals loaded on the support were well dispersed. The performance of Ni-Fe/PAC-gamma Al2O3 catalysts compared with single support catalyst NiO-Fe2O3/gamma Al2O3 (NFA) and NiO-Fe2O3/PAC (NFP) was studied. The results showed that the Ni-Fe/PAC-gamma Al2O3 catalysts showed a good catalytic activity which obviously enhanced the H-2 gas yield to 54.23 g/kg Rape straw and reduced the tar yield to 4.06 g/kg. Meanwhile, Ni-Fe/PAC-gamma Al2O3 catalysts had a stronger ability to prevent the deactivation to keep a longtime stability than the single carrier catalyst. (C) 2019 Elsevier Ltd. All rights reserved.

语种： 英文

作者： Qin, Zhenhua;Yu, Jiuhong;Chen, Ken;Fan, Guozhi;Cheng, Qunpeng*;...

期刊： Desalination and Water Treatment,2019年153:76-84 ISSN：1944-3994

通讯作者： Cheng, Qunpeng;Song, Guangsen

作者机构： [Yu, Jiuhong; Cheng, Qunpeng; Qin, Zhenhua; Song, Guangsen; Chen, Ken; Fan, Guozhi; Song, GS] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Cheng, QP; Song, GS] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

关键词： Adsorption;Drinking-water treatment sludge;Modified;Phosphoru;Pyrolysis

摘要： A modified drinking-water treatment sludge (MDWTS) by pyrolysis was used as the adsorbent for the removal of phosphorus. The influence of pyrolysis temperature, dosage of adsorbent, contact time and pH on the P adsorption capacity were tested. Meanwhile the equilibrium and kinetics of adsorption process by DWTS and MDWTS were also studied. The results showed that the adsorption capacity of DWTS was greatly improved after pyrolyzed. The increase of pyrolysis temperature was benefit for the phosphorus adsorption. The maximum adsorption capacity (25.32 mg/g) of MDWTS was appeared at 800°C. The adsorption capacity of DWTS and MDWTS was strongly dependent on solution pH especially at low pH. The maximum phosphorus adsorption capacity were achieved at pH 5. As the dosage of DWTS and MDWTS increased from 0.5 to 3 g/100 ml, P adsorption capacity decreased from 7.47 mg/g to 1.74 mg/g and 22.45 mg/g to 3.26 mg/g respectively. High-adsorbent dosage could effectively reduce the unsaturation of the ion-exchange sites of DWTS and MDWTS which caused comparatively lesser ion exchange. The adsorption isotherms of P removal by DWTS and MDWTS were well described by Freundlich models, suggesting the adsorption of phosphorus was a heterogeneous surface adsorption process. Meanwhile kinetics studies showed that the adsorption process of P followed pseudo-second order kinetic model. © 2019 Desalination Publications. All rights reserved.

语种： 英文

作者： 李芙蓉;范国枝;王文清

期刊： 化学世界,2019年60(9):561-567 ISSN：0367-6358

作者机构： 武汉轻工大学化学与环境工程学院,湖北武汉,430023;[王文清; 李芙蓉; 范国枝] 武汉轻工大学

关键词： 限制供氧;绿锈;硫酸根

摘要： 在不同的供氧条件下,开展了利用Fe~0/Fe~(2+)复合体系去除硫酸根的实验研究,对反应产物进行了 X射线衍射(XRD)、扫描电子显微镜(SEM)及X射线光电子能谱分析(XPS)表征,并剖析了其作用机理。结果表明:供氧条件对硫酸根的去除效果由好到差的顺序依次为:限制供氧>好氧>厌氧,硫酸根的去除率分别为(93.4±1.3)%、(67.1±3.2)%和(18.8±2.8)%。经表征确定限制供氧条件下产生的墨绿色絮体为硫酸盐绿锈,而好氧条件下的最终产物主要为纤铁矿。限制供氧条件下Fe~0/Fe~(2+)复合体系制备硫酸盐绿锈去除硫酸根实质是传统氧化法和共沉淀法制备硫酸盐绿锈的结合,克服了传统方法的缺点,具有操作简便,成本低廉的特点。

语种： 中文

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.

语种： 英文

作者： Chai, Bo;Yan, Juntao;Fan, Guozhi;Song, Guangsen*;Wang, Chunlei

期刊： NEW JOURNAL OF CHEMISTRY,2019年43(20):7846-7854 ISSN：1144-0546

通讯作者： Song, Guangsen

作者机构： [Wang, Chunlei; Song, Guangsen; Chai, Bo; Yan, Juntao; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Song, Guangsen] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

关键词： cadmium derivative;lactic acid;microsphere;molybdenum complex;reagent;sulfur derivative;zinc derivative;Article;chemical composition;crystal structure;hydrogen evolution;impedance spectroscopy;light;measurement;morphology;photocatalysis;priority journal;quantum chemistry;Raman spectrometry;surface area;X ray diffraction;X ray photoemission spectroscopy

摘要： A series of Cd1-xZnxS solid solutions and samples of amorphous MoS2 decorated on Cd1-xZnxS microspheres were successfully prepared. The crystal phases, morphologies, elemental distribution, chemical compositions, optical properties, and specific surface areas of the as-fabricated samples were investigated by the corresponding measurement techniques. The photocatalytic H2 evolution activities of the MoS2/Cd1-xZnxS composites were explored and compared using lactic acid as a sacrificial reagent. The results manifested that 5 wt% MoS2 loaded on the surface of the Cd0.8Zn0.2S solid solution could attain the highest photocatalytic H2 evolution rate of 12.39 mmol g-1 h-1, corresponding to an apparent quantum efficiency (AQE) of about 16.5% under 420 nm monochromatic light. The electrochemical impedance spectroscopy (EIS), transient photocurrent response and photoluminescence (PL) spectroscopy experiments confirmed that MoS2 as a cocatalyst could promote the transfer and separation of photogenerated charge carriers on the Cd0.8Zn0.2S solid solution. In addition, amorphous MoS2 decorated on the Cd0.8Zn0.2S sample showed a much better performance than that of crystalline MoS2. This could be because amorphous MoS2 possessed more abundant active sites than its crystalline counterpart. Based on the energy band positions of Cd0.8Zn0.2S and MoS2, a tentative mechanism for the enhanced photocatalytic H2 evolution activity was proposed. © 2019 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

语种： 英文

作者： Chai, Bo;Yan, Juntao;Fan, Guozhi;Song, Guangsen*;Wang, Chunlei

期刊： Journal of Alloys and Compounds,2019年802:301-309 ISSN：0925-8388

通讯作者： Song, Guangsen

作者机构： [Wang, Chunlei; Song, Guangsen; Chai, Bo; Yan, Juntao; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Song, Guangsen] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

关键词： Band structure;Bismuth compounds;Charge carriers;Chemical analysis;Electrochemical impedance spectroscopy;Heterojunctions;Ion exchange;Light;Optical properties;Photocatalysis;Photoluminescence spectroscopy;Rhodium compounds;Semiconductor quantum wells;Silicon compounds;Chemical compositions;In-situ construction;Ion-exchange strategy;Photocatalytic performance;Transient photocurrents;Type II hetero junctions;Visible light;Visible-light irradiation;Photocatalytic activity

摘要： To further improve the light response range and photocatalytic activity of Bi2SiO5, the Bi2SiO5/BiOBr type-II heterojunction photocatalysts were constructed by in-situ partial ion exchange strategy using Bi2SiO5 as precursor. The crystal phases, morphologies, chemical compositions, optical properties and textural structures of as-synthesized Bi2SiO5/BiOBr photocatalysts were characterized by the corresponding analytical techniques. The photocatalytic activities of samples were evaluated by degrading Rhodamine B (RhB) solution under visible light irradiation. The results showed that the Bi2SiO5/BiOBr heterojunction photocatalysts significantly improved the photocatalytic performances, which would be ascribed to the extended light response, enhanced adsorption capacity, matched energy band structures and intimate interface contact. Construction of Bi2SiO5/BiOBr heterojunction facilitated the separation and transfer of photoexcited charge carriers, which were verified by the electrochemical impedance spectroscopy (EIS), transient photocurrent response and steady photoluminescence spectroscopy (PL) measurements. This work would offer a new insight into the design and preparation of Bi2SiO5-based heterojunction photocatalysts for the removal of organic contaminant. © 2019 Elsevier B.V.

语种： 英文

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.

语种： 英文

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

作者： Rao, Na;Wang, Mei*;Shang, Ziming;Hou, Yanwen;Fan, Guozhi;...

期刊： Energy & Fuels,2018年32(1):670-677 ISSN：0887-0624

通讯作者： Wang, Mei;Li, Jianfen

作者机构： [Rao, Na; Shang, Ziming; Li, Jianfen; Wang, Mei; Hou, Yanwen; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 40023, Hubei, Peoples R China.

通讯机构： [Wang, M; Li, JF] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 40023, Hubei, Peoples R China.

摘要： Modifications by impregnation and grafting are commonly used for the preparation of amine-functionalized MCM-41. A comprehensive evaluation of the advantages and disadvantages of the two methods was performed in this work. MCM-41 was synthesized by the hydrothermal method, setting the amine-loading mass fraction at 40, 50, and 60 wt %. Three amine-modified adsorbents were prepared by impregnating polyethylenimine (PEI), and the three other adsorbents were prepared by grafting 3-aminopropyltriethoxysilane (APTS) onto MCM-41. The as-prepared adsorbents were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and N2 adsorption-desorption techniques. CO2 adsorption capacities were measured, and the experimental data were fitted with adsorption kinetic models. The cyclic stability of the adsorbents prepared by the two kinds of amine-modified methods was compared using the cyclic adsorption-desorption experiments. The characterization results showed that the target adsorbents were prepared successfully. The thermal stability of the adsorbents modified by grafting was better than the thermal stability of the adsorbents modified by the impregnation. Maximum CO2 adsorption capacities of 3.53 mmol g-1 (50% PEI-MCM-41) and 2.41 mmol g-1 (50% APTS-MCM-41) could be reached at 25 °C and 1 atm, which were 4.7 and 3.2 times greater than that of MCM-41. The Avrami model fitted the experimental data well, indicating a variety of interactions between the adsorbents and CO2. CO2 adsorption capacity after 5 adsorption-desorption cycles decreased by 14.22 and 5.19% for the adsorbents prepared by impregnation and grafting, respectively. It was concluded that MCM-41 modified by impregnation and grafting followed the same kinetic model. The absorbents modified by impregnation showed higher CO2 adsorption capacity and amine-loading efficiency, while those prepared by grafting had better thermal and cyclic stabilities. © 2017 American Chemical Society.

语种： 英文

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

作者： Fan, Guo-Zhi*;Wang, Yue-Xin;Song, Guang-Sen;Yan, Jun-Tao;Li, Jian-Fen

期刊： Journal of Applied Polymer Science,2017年134(22):n/a-n/a ISSN：0021-8995

通讯作者： Fan, Guo-Zhi

作者机构： [Wang, Yue-Xin; Yan, Jun-Tao; Li, Jian-Fen; Song, Guang-Sen; Fan, Guo-Zhi] Wuhan Polytechn Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Fan, Guo-Zhi] W;Wuhan Polytechn Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： cellulose;microcrystalline cellulose;microwave irradiation;rice straw

摘要： Crude cellulose was isolated from rice straw and then converted into microcrystalline cellulose (MCC) via partial hydrolysis. Both the isolation and partial hydrolysis were carried out under microwave. Rice straw was successively pretreated with alkaline and acid solutions before hydrolysis. Lignin and silica were almost removed but partial removal of hemicellulose in dilute alkali solution, and the residual hemicellulose was further removed in dilute acid solution. The total removal rates of hemicellulose, lignin and silica reached up 92.0%, 98.5%, and 96.8%, respectively. The cellulose content of 93.6 wt % in MCC was given by partial hydrolysis of crude cellulose isolated from rice straw. The comparison between microwave irradiation and traditional heating method was also investigated. Compared to traditional heating method, similar results were obtained while milder conditions, including shorter time and lower temperature, were required. An effective microwave-assisted and energy-efficient methodology using rice straw as the alternative source of cellulose fiber was developed. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44901. © 2017 Wiley Periodicals, Inc.

语种： 英文

作者： Fan, Guozhi*;Wang, Yuexin;Yan, Juntao;Song, Guangsen;Li, Jianfen*

期刊： Journal of CO2 Utilization,2017年18:370-377 ISSN：2212-9820

通讯作者： Fan, Guozhi;Li, Jianfen

作者机构： [Wang, Yuexin; Li, Jianfen; Song, Guangsen; Yan, Juntao; Fan, Guozhi; Li, J] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Fan, GZ; Li, J] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： Bins;Carbon dioxide;Catalyst activity;Catalysts;Chemical reactions;Copper compounds;Iron compounds;Styrene;Catalytic performance;Catalytic system;Coupling reaction;Optimized conditions;Reaction conditions;Reaction temperature;Styrene carbonates;Styrene oxide;Catalyst supports

摘要： Cu(acac)2/n-Bu4NBr/Fe3O4@MCM-41 was prepared by supporting Cu(acac)2 as well as n-Bu4NBr on complex support of Fe3O4@MCM-41 and developed as binary supported catalyst for the synthesis of styrene carbonate (SC) via the coupling reaction of styrene oxide (SO) with carbon dioxide (CO2). The activity of the supported catalyst was investigated by supporting Cu(acac)2 and n-Bu4NBr alone or together, varying molar ratio of materials and reaction conditions including CO2 pressure, reaction temperature as well as time. Cu(acac)2/n-Bu4NBr/Fe3O4@MCM-41 displayed higher catalytic activity than that of single supported catalyst, homologous homogenous catalytic system composed of Cu(acac)2 and n-Bu4NBr in terms of the conversion of SO and the yield of SC. Excellent SC yield at 87.5% was obtained under optimized conditions. The recyclability of binary supported catalyst was also performed. No obvious loss in the activity was observed at the initial 3 cycles and the subsequent loss in the catalytic performance can be recovered by supplementing moderate amount of n-Bu4NBr. © 2017 Elsevier Ltd. All rights reserved.

语种： 英文

作者： Luo, Shanshan;Fan, Guozhi*;Luo, Ming;Li, Jianfen;Song, Guangsen

期刊： Journal of CO2 Utilization,2016年14:23-30 ISSN：2212-9820

通讯作者： Fan, Guozhi

作者机构： [Li, Jianfen; Luo, Ming; Song, Guangsen; Fan, Guozhi; Luo, Shanshan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Fan, Guozhi] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： Carbon;Carbonation;Catalyst activity;Catalysts;Gas adsorption;Infrared spectroscopy;Mesoporous materials;Nanomagnetics;Nanoparticles;Permanent magnets;Styrene;X ray diffraction;Magnetic nano-particles;Nitrogen adsorption desorption isotherms;Powder X ray diffraction;Reaction conditions;Recyclable catalyst;Solvent free synthesis;Styrene carbonates;ZnBr2;Carbon dioxide

摘要： ZnBr2 supported on magnetic nanoparticles Fe3O4 coated by MCM-41 (Fe3O4@MCM-41/ZnBr2) was prepared and characterized by infrared spectroscopy (IR), powder X-ray diffraction (XRD) and nitrogen adsorption-desorption isotherms. The as-prepared samples were used as a recyclable catalyst for solvent-free synthesis of styrene carbonate (SC) from styrene oxide (SO) and carbonate dioxide (CO2). The results showed that Fe3O4@MCM-41/ZnBr2 exhibited similar catalytic activity to homologous ZnBr2. It was found that the reaction depended on the reaction conditions in terms of the yield of SC. The yield of SC at 81.5% was obtained with 8 MPa CO2 pressure at 90 °C for 3 h. The supported catalyst Fe3O4@MCM-41/ZnBr2 can be easily recovered by a permanent magnet after the reaction and reused without further treatment. No significant change in the structure and loss in activity were observed. The yield of SC changed in a small range from 79.2 to 82.6% during 5 cycles. © 2016 Elsevier Ltd. All rights reserved.

语种： 英文

作者： 罗珊珊;罗鸣;兰坤;范国枝

期刊： 化学与生物工程,2016年(4):37-40 ISSN：1672-5425

作者机构： 武汉轻工大学化学与环境工程学院,湖北 武汉,430023;[罗珊珊; 罗鸣; 兰坤; 范国枝] 武汉轻工大学

关键词： 乙酰丙酮铜;二氧化碳;氧化苯乙烯;苯乙烯环状碳酸酯

摘要： 采用浸渍法制备了负载催化剂MCM-41包裹Fe3O4负载乙酰丙酮铜[Fe3O4@MCM-41/Cu（acac）2],利用红外光谱（IR）和X-射线粉末衍射（XRD）对负载催化剂的结构进行了表征,并采用原子吸收光谱（AAS）测定了负载催化剂中的Cu负载量;研究了负载催化剂在二氧化碳（CO2）和氧化苯乙烯（SO）偶联合成苯乙烯环状碳酸酯（SC）反应中的催化性能,考察了Cu负载量、反应温度、反应压力和反应时间等对SC合成的影响,并采用气相色谱（GC）对SC产率进行了定量分析,利用磁铁对负载催化剂进行了回收并研究了其循环催化性能。结果表明,负载催化剂具有较高的催化活性,SC产率高达91.7%;在重复使用5次后,负载催化剂的催化活性基本保持不变。

语种： 中文

作者： 廖崇静;罗珊珊;方涛;范国枝

期刊： 湖北农业科学,2015年(8):1950-1953 ISSN：0439-8114

作者机构： 武汉轻工大学化学与环境工程学院,武汉,430023;[廖崇静; 方涛; 罗珊珊; 范国枝] 武汉轻工大学

关键词： 稻秆;纤维素;超临界CO2;磷钨酸;水解

摘要： 研究了超临界CO2中磷钨酸催化稻秆纤维素水解反应,并采用二硝基水杨酸（DNS）法和间接碘量法分别测定水解产物中还原糖和葡萄糖的产率。考察了CO2压力、去离子水及磷钨酸的用量、反应温度以及反应时间对纤维素水解反应的影响。结果表明,当CO2压力为8 MPa,去离子水用量为8 m L,反应温度为140℃,反应时间为6 h,催化剂磷钨酸用量为0.10 mmol时,还原糖产率达到34.1%。

语种： 中文

作者： Liao, Chongjing;Fang, Tao;Luo, Shanshan;Fan, Guo-Zhi*;Song, Guangsen

期刊： Journal of Applied Polymer Science,2015年132(1):n/a-n/a ISSN：0021-8995

通讯作者： Fan, Guo-Zhi

作者机构： [Liao, Chongjing; Song, Guangsen; Fan, Guo-Zhi; Fang, Tao; Luo, Shanshan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Fan, Guo-Zhi] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： catalysts;cellulose and other wood products;synthesis and processing

摘要： The preparation of partial acetylation of cellulose derived from rice straw was catalyzed by phosphotungstic acid with various numbers of crystal water, and H3PW12O40.4H2O was found to be as effective catalyst. The yield of the cellulose acetate was significantly enhanced by converting cellulose directly isolated from rice straw into microcrystalline cellulose before acetylation. The optimization of the acetylation was investigated by varying the amount of catalyst and acetic anhydride as well as reaction conditions including reaction time and medium, and a degree of substitution (DS) value of 2.29 and yield of 62.9% were obtained under the optimized conditions. The structure and the formation of the acetylated product were confirmed by Fourier transform infrared spectroscopy (FTIR) and powder X-ray diffraction (XRD) technique, the thermal properties were determined by thermal analysis including thermogravimetry analysis (TGA) and differential scanning calorimetry (DSC), and the morphology was observed by scanning electron microscope (SEM). © 2014 Wiley Periodicals, Inc.

语种： 英文

作者： Fan, Guozhi*;Luo, Shanshan;Fang, Tao;Wu, Qiang;Song, Guangsen;...

期刊： Journal of Molecular Catalysis A: Chemical,2015年404-405:92-97 ISSN：1381-1169

通讯作者： Fan, Guozhi

作者机构： [Li, Jianfen; Song, Guangsen; Fan, Guozhi; Luo, Shanshan; Fang, Tao; Wu, Qiang] 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： Aniline;Carbon;Catalysis;Catalyst activity;Cerium;Methanol;Synthesis (chemical);Catalyzed synthesis;Formation pathways;Methyl;Methyl N-phenylcarbamate;Optimized conditions;Phenyl isocyanates;Phenylcarbamate;Reaction conditions;Carbon dioxide

摘要： Direct synthesis of methyl N-phenylcarbamate (MPC) from carbon dioxide (CO2), aniline and methanol catalyzed by cerium dioxide (CeO2) in the presence of n-butyllithium (BuLi) was developed. The catalytic activity of CeO2 was significantly improved by the addition of BuLi. The conversion of aniline and the yield of MPC were dependent on the amount of CeO2 and BuLi, reaction conditions including the pressure of CO2, reaction time and temperature, and 9.4% yield of MPC was obtained under the optimized conditions. The formation pathway of MPC was also investigated in detail by varying reactants based on previously reported investigations, and phenyl isocyanate (PI) was believed to be the intermediate for the synthesis of MPC. A possible reaction pathway for the direct synthesis of MPC from CO2, aniline and methanol was proposed. © 2015 Published by Elsevier B.V.

语种： 英文

作者： Fan, Guozhi*;Luo, Shanshan;Wu, Qiang;Fang, Tao;Li, Jianfen;...

期刊： RSC Advances,2015年5(70):56478-56485 ISSN：2046-2069

通讯作者： Fan, Guozhi

作者机构： [Li, Jianfen; Song, Guangsen; Fan, Guozhi; Luo, Shanshan; Fang, Tao; Wu, Qiang] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Fan, Guozhi] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

摘要： A magnetic Fe<inf>3</inf>O<inf>4</inf>@SiO<inf>2</inf>-ZnBr<inf>2</inf>catalyst was prepared by supporting ZnBr<inf>2</inf>on silica-coated magnetic nanoparticles of Fe<inf>3</inf>O<inf>4</inf>and used as a recoverable catalyst for the direct synthesis of diphenyl carbonate (DPC) from CO<inf>2</inf>and phenol in the presence of carbon tetrachloride. The as-prepared catalyst was characterized by infrared spectroscopy (IR), powder X-ray diffraction (XRD), a X-ray photoelectron spectrometer (XPS) and BET. Zn loading in the supported catalyst and leaching during the reaction process were determined by atomic absorption spectroscopy (AAS). It was found that Fe<inf>3</inf>O<inf>4</inf>@SiO<inf>2</inf>-ZnBr<inf>2</inf>showed higher catalytic activity than homogenous ZnCl<inf>2</inf>and ZnI<inf>2</inf>as well as homogenous ZnBr<inf>2</inf>. With this new catalyst under optimized conditions, a yield of DPC at 28.1% was obtained. The heterogeneous catalyst Fe<inf>3</inf>O<inf>4</inf>@SiO<inf>2</inf>-ZnBr<inf>2</inf>can also be recovered by a permanent magnet after the reaction and reused up to 4 times without noticeable deactivation. ©The Royal Society of Chemistry 2015.

语种： 英文