作者： Yu, Bowei;Fan, Guozhi*;Zhao, Sijiu;Lu, Yuchan;He, Qiao;...

期刊： APPLIED BIOLOGICAL CHEMISTRY,2021年64(1):1-13 ISSN：2468-0834

通讯作者： Fan, Guozhi

作者机构： [Cheng, Qunpeng; Lu, Yuchan; Song, Guangsen; Chai, Bo; Yu, Bowei; Yan, Juntao; Fan, Guozhi; Zhao, Sijiu; He, Qiao] 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： Wheat straw;Two-stage process;Isolation;Cellulose;Lignin;Conversion

摘要： <jats:title>Abstract</jats:title><jats:p>Convertible cellulose and lignin were simultaneously isolated from wheat straw using a two-stage process via simply varying temperature and H<jats:sub>2</jats:sub>SO<jats:sub>4</jats:sub> concentration. At the first-stage, cellulose was obtained by pretreating wheat straw at lower temperature and acid concentration using an organosolv process. The purity, yield and recovery rate of cellulose reached 86.8 wt%, 55.2 and 92.8% at 150°C with 1 wt% H<jats:sub>2</jats:sub>SO<jats:sub>4</jats:sub>. At the second stage, the residual liquid was further treated at higher temperature and acid concentration, giving 17.4% lignin yield with 86.6% recovery rate and 93.2 wt% purity at 180°C with 1.5 wt% H<jats:sub>2</jats:sub>SO<jats:sub>4</jats:sub>. The conversion of the as-isolated cellulose and lignin into chemicals was further investigated. The total yield of 5-hydroxymethylfurfural and glucose derived from wheat straw cellulose reached 82.5%, and 18.3% yield of monophenolic compounds from lignin were obtained, respectively. These results indicated that the two-stage process was effective for obtaining high-quality cellulose and lignin from wheat straw. Both of them displayed excellent convertible property.</jats:p>

语种： 英文

作者： Cheng, Q.;Huang, W.;Jiang, M.;Xu, C.;Fan, G.;...

期刊： International Journal of Environmental Science and Technology,2021年18(11):3685-3696 ISSN：1735-1472

通讯作者： Song, G.

作者机构： [Zhang, S.; Huang, W.; Fan, G.; Xu, C.; Chai, B.; Cheng, Q.; Song, G.; Yan, J.; Zhang, Y.] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430073, Peoples R China.;[Jiang, M.] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan, Peoples R China.;[Xiao, B.] Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Wuhan, Peoples R China.

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

关键词： Anaerobic digestion;Indicators;Hydrogen sulfide;Ammonia;Temperature;Biogas slurry

摘要： Anaerobic digestion is a widely applicated technology for the treatment of wastes. Though it has been developed for many years, there are still some existing problems that need to be solved especially when it is used in a large scale in China. Substantial researches have been carried out and tried to increase biogas production and treatment efficiency in anaerobic digestion. In this review, the development and problems existed in anaerobic digestion are summarized like raw materials, indicators; hydrogen sulfide, ammonia; temperature, optimization, biogas slurry and residues in order to supply the suggestions for the researchers for the further development of anaerobic digestion and its application in a large scale in China. © 2021, Islamic Azad University (IAU).

语种： 英文

作者： Luo, Ke-Hui;Zhao, Si-Jiu;Fan, Guo-Zhi*;Cheng, Qun-Peng;Chai, Bo;...

期刊： FOOD SCIENCE & NUTRITION,2020年8(7):3504-3514 ISSN：2048-7177

通讯作者： Fan, Guo-Zhi

作者机构： [Cheng, Qun-Peng; Chai, Bo; Zhao, Si-Jiu; Song, Guang-Sen; Fan, Guo-Zhi; Luo, Ke-Hui] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

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

关键词： aromatic compound;composite catalyst;lignin;oxidative conversion;Wheat straw

摘要： <jats:title>Abstract</jats:title><jats:p>Lignin was isolated from wheat straw via organosolv process and further transferred to monophenolic compounds via oxidative conversion. Wheat straw lignin (WSL) with purity at 91.4 wt% was acquired in the presence of heterogeneous and recyclable catalyst of Amberlyst‐45. WSL was characterized by infrared spectrometer (IR), nuclear magnetic resonance spectroscopy (NMR) including <jats:sup>1</jats:sup>H NMR and <jats:sup>13</jats:sup>C NMR spectra. The results showed that WSL possesses typical syringyl (S), guaiacyl (G), and <jats:italic>p</jats:italic>‐hydroxyphenyl (H) units, and it is mainly composed of S and G units. The product distribution was dependent on the composition of WSL. Derivatives from S and G units were found to be the main products. The oxidative conversion of WSL was performed by varying oxidant and catalyst. Both the formation of monophenolic compounds and aromatic aldehydes were enhanced by combining oxidants and catalysts. The composite catalyst composed of NaOH/NaAlO<jats:sub>2</jats:sub> was effective for the oxidation of WSL in the presence of nitrobenzene and atmospheric pressure air. The total yield of monophenolic compounds reached up 18.1%, and yields at 6.3 and 5.7% for syringaldehyde and vanillin were achieved, respectively.</jats:p>

语种： 英文

作者： Shen, Wenjuan;Wang, Xiaoming;Jia, Falong*;Tong, Zhe;Sun, Hongwei;...

期刊： Applied Catalysis B: Environmental,2020年264:118550 ISSN：0926-3373

通讯作者： Jia, Falong;Ai, Zhihui;Zhang, Lizhi

作者机构： [Zhang, Lizhi; Jia, FL; Ai, ZH; Zhang, LZ; Sun, Hongwei; Wang, Xiaobing; Shen, Wenjuan; Jia, Falong; Tong, Zhe; Song, Fahui; Ai, Zhihui] Cent China Normal Univ, Inst Environm & Appl Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Peoples R China.;[Wang, Xiaoming] Huazhong Agr Univ, Minist Agr, Coll Resources & Environm, Key Lab Arable Land Conservat Middle & Lower Reac, Wuhan 430070, Peoples R China.;[Chai, Bo; Shen, Wenjuan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Jia, FL; Ai, ZH; Zhang, LZ] C;Cent China Normal Univ, Inst Environm & Appl Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Peoples R China.

关键词： Amorphous zero-valent iron;Anaerobic reduction;Ethylenediamine;Formation mechanism;Thiamphenicol

摘要： As a new member of zero-valent iron (ZVI) family, amorphous zero-valent iron microspheres (A-mZVI) were very promising for the aerobic disinfection of Escherichia coli. However, their formation and anaerobic reduction performance are still unknown. In this study, we investigated A-mZVI's formation mechanism and checked its anaerobic reduction ability with using thiamphenicol as a model contaminant, and found that the presence of ethylenediamine decreased the reducing capacity of NaBH4, the Fe(II) reduction rate, and the energy for crystal growth, and thus favored the formation of metastable amorphous structure. Moreover, this amorphous structural nature of A-mZVI endowed it with an apparent thiamphenicol reduction rate constant as high as 4.8 × 10−2 min−1, 7.9 times that (6.1 × 10−3 min−1) of crystalline zero-valent iron microspheres (C-mZVI). Further investigation revealed that the enhanced anaerobic thiamphenicol reduction of A-mZVI was strongly ascribed to its promoted electron donating ability arisen from the amorphization process. © 2019 Elsevier B.V.

语种： 英文

作者： Xiong, Minghui;Yan, Juntao;Chai, Bo*;Fan, Guozhi;Song, Guangsen*

期刊： 材料科学技术(英文),2020年56(21):179-188 ISSN：1005-0302

通讯作者： Chai, Bo;Song, Guangsen

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

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

关键词： Cadmium sulfide;Exfoliation (materials science);Heterojunctions;II-VI semiconductors;Lactic acid;Layered semiconductors;Molybdenum compounds;Photocatalytic activity;Photoluminescence;Sintering;Generation reaction;Multiple characteristics;Photocatalytic H2 evolution;Photoelectrochemicals;Photoinduced electrons;Photoluminescence spectrum;Sacrificial reagent;Visible-light irradiation;Sulfur compounds

摘要： Fabrication of 2D/2D heterojunction photocatalysts have attracted more attentions due to their inherent merits involving the large contact interface, short charge migration distance and plentiful active sites, which are beneficial for the enhancement of photocatalytic activity. Herein, a series of 2D/2D MoS2/CdS type-I heterojunctions were prepared by incorporation the exfoliating of bulk CdS and MoS2 with post-sintering procedure. Multiple characteristic techniques were employed to corroborate the formation of heterojunctions. By optimizing the 2D MoS2 amounts in the heterojunction, the 7 wt.% 2D/2D MoS2/CdS heterojunction displayed the maximal photocatalytic H2 evolution rate of 18.43 mmol h−1 g−1 under visible light irradiation in the presence of lactic acid as the sacrificial reagent, which was 6 times higher than that of pristine 2D CdS. Based on the photoelectrochemical and photoluminescence spectra tests, it could be deduced that the charge separation and transfer of 2D/2D MoS2/CdS heterojunction was tremendously improved, and the recombination of photoinduced electron-hole pairs was effectively impeded. Moreover, the 2D MoS2 was used as a cocatalyst to provide the abundant active sites and lower the overpotential for H2 generation reaction. The current work would offer an insight to fabricate the 2D/2D heterojunction photocatalysts for splitting H2O into H2. © 2020

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(英文),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： Chai, Bo*;Yan, Juntao;Fan, Guozhi;Song, Guangsen*;Wang, Chunlei

期刊： 催化学报(英文),2020年41(1):170-179 ISSN：0253-9837

通讯作者： Chai, Bo;Song, Guangsen

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

通讯机构： [Chai, Bo; Song, Guangsen] W;Wuhan Polytech Univ, Hubei Key Lab Anim Nutr & Feed Sci, Wuhan 430023, Hubei, Peoples R China.;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

关键词： CdMoO4/g-C3N4 composite;Charge separation;Heterojunction;Photocatalytic activity;Visible light

摘要： To further improve the charge separation and photocatalytic activities of g-C3N4 and CdMoO4 under visible light irradiation, CdMoO4/g-C3N4 composites were rationally synthesized by a facile precipitation-calcination procedure. The crystal phases, morphologies, chemical compositions, textural structures, and optical properties of the as-prepared composites were characterized by the corresponding analytical techniques. The photocatalytic activities toward degradation of rhodamine B solution were evaluated under visible light irradiation. The results revealed that integrating CdMoO4 with g-C3N4 could remarkably improve the charge separation and photocatalytic activity, compared with those of pristine g-C3N4 and CdMoO4. This would be because the CdMoO4/g-C3N4 composites could facilitate the transfer and separation of the photoexcited electron-hole pairs, which was confirmed by electrochemical impedance spectroscopy, transient photocurrent responses, and photoluminescence measurements. Moreover, active species trapping experiments demonstrated that holes (h+) and superoxide radicals (·O2−) were the main active species during the photocatalytic reaction. A possible photocatalytic mechanism was proposed on the basis of the energy band structures determined by Mott-Schottky tests. This work would provide further insights into the rational fabrication of composites for organic contaminant removal. © 2020 Dalian Institute of Chemical Physics, Chinese Academy of Sciences

语种： 英文

作者： Xiong, Minghui;Chai, Bo*;Yan, Juntao;Fan, Guozhi;Song, Guangsen*

期刊： Applied Surface Science,2020年514:145965 ISSN：0169-4332

通讯作者： Chai, Bo;Song, Guangsen

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

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

关键词： Charge separation and transfer;Cocatalyst;Photocatalytic H2 evolution;WS2/ZnIn2S4 heterojunction

摘要： Exploiting the low-cost, abundant and noble-metal-free cocatalysts was still a research hotspot in the photocatalysis field. Herein, few-layer WS2 decorating ZnIn2S4 heterojunctions were successfully fabricated by a two-step procedure including exfoliating bulk WS2 and post-sintering treatment. The multiple characterization techniques were employed to investigate the properties of as-prepared WS2/ZnIn2S4 heterojunctions. The photocatalytic activities were evaluated by H2 evolution performances, and the results revealed that the activities would be significantly promoted by integrating a little amount of WS2 with ZnIn2S4. Moreover, the optimal loading amount of WS2 was about 3 wt% in the heterojunctions, corresponding to the H2 evolution rate of 2.55 mmol g−1h−1 and the apparent quantum efficiency (AQE) of 3.2% at 420 nm monochromatic light. Based on the photoelectrochemical and photoluminescence (PL) spectra tests, the effective charge separation and transfer in the WS2/ZnIn2S4 heterojunction were convincingly corroborated, which was beneficial for the improvement of photocatalytic activity. Furthermore, the few-layer WS2 as cocatalysts could also offer the sufficient active sites to facilitate the H2 evolution. The present work would provide some insights for the development of non-noble-metal cocatalysts in the photocatalysis region. © 2020 Elsevier B.V.

语种： 英文

作者： Liu, Chun;Xiong, Minghui;Chai, Bo*;Yan, Juntao;Fan, Guozhi;...

期刊： Catalysis Science & Technology,2019年9(24):6929-6937 ISSN：2044-4753

通讯作者： Chai, Bo;Song, Guangsen

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

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

摘要： Two-dimensional (2D) materials have received tremendous attention in photocatalysis owing to their superior physicochemical properties including high specific surface areas, efficient interfacial charge separation and abundant surface active sites. Herein, 2D/2D Ni2P/CdS heterojunctions with Ni2P nanosheets (NSs) loaded on ultrathin CdS NSs were fabricated by combining liquid exfoliation of bulk CdS with a post-annealing procedure. The crystal phases, morphologies, microstructures, optical properties and specific surface areas of the as-prepared photocatalysts were thoroughly investigated by multiple detection techniques. The results of photocatalytic H2 evolution performance under visible light revealed that the optimal 2D/2D Ni2P/CdS heterojunction showed a significantly enhanced photocatalytic H2 evolution rate of 17.95 mmol g-1 h-1 using lactic acid as a sacrificial reagent, which was approximately 6 times higher than that of bare exfoliated CdS NSs, corresponding to the apparent quantum efficiency (AQE) of 4.2% under 420 nm monochromatic light. In addition, based on the analysis of electrochemical impedance spectroscopy (EIS), photocurrent response, steady photoluminescence (PL) spectroscopy and time-resolved photoluminescence (TRPL) spectroscopy, the enhanced photocatalytic H2 evolution activity was attributed to the effective separation and transfer of photogenerated charge carriers and generation of sufficient active sites. This work provided valid evidence that the use of 2D/2D heterojunction photocatalysts would be a promising technique in water splitting for H2 generation. © 2019 The Royal Society of Chemistry.

语种： 英文

作者： 柴波;杨晓鸿;张剑

期刊： 创新创业理论研究与实践,2019年2(23):102-103 ISSN：2096-5206

作者机构： 武汉轻工大学化学与环境工程学院,湖北武汉 430023;[张剑; 柴波; 杨晓鸿] 武汉轻工大学

关键词： 材料化学;创新创业;人才培养

摘要： 在高等学校创新创业教育改革的背景下,对武汉轻工大学材料化学专业创新创业人才培养模式从人才培养方案修订,教学方法、教学手段和教学内容改革,实施本科生导师制等措施进行了一些改革和探索,期望为其他高等学校创新创业教育改革提供一些借鉴。

语种： 中文

作者： Deng, Li;Liu, Yi;Zhao, Gan;Chen, Jiahao;He, Shufan;...

期刊： Journal of Electroanalytical Chemistry,2019年832:459-466 ISSN：1572-6657

通讯作者： Ren, Zhandong

作者机构： [Deng, Li; He, Shufan; Zhu, Yuchan; Liu, Yi; Chai, Bo; Chen, Jiahao; Ren, Zhandong; Zhao, Gan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

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

关键词： Chlorine;Cyclic voltammetry;Decomposition;Iridium compounds;Scanning electron microscopy;Sodium chloride;Tantalum oxides;Titanium dioxide;Viruses;Chlorine content;Chlorine evolution;Electrolyzed oxidizing water;Oxygen evolution reaction;Service lifetime;Electrochemical electrodes

摘要： Electrolyzed oxidizing water (EO water) is a new disinfectant, which has been proved to possess the high bactericidal efficiency against a wide variety of microorganisms ranging from bacteria to viruses. EO water is generated by electrolysis of an extremely dilute NaCl solution. Therefore, it is necessary to enhance the selectivity of chlorine evolution reaction (CER), which the oxygen evolution side reaction (OER) needs to be minimized. In the present study, the TiO2 doped IrO2-Ta2O5 (IrO2-Ta2O5-TiO2) electrode was prepared by the thermal decomposition method. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray fluorescence (XRF) characterizations were employed to study the performances the IrO2-Ta2O5-TiO2 electrode. The electrochemical behaviors and actives of the IrO2-Ta2O5-TiO2 electrode coupled with the IrO2-Ta2O5 electrode was investigated using cyclic voltammetry (CV) and linear sweep voltammetry (LSV). Furthermore, the selectivity of CER was analyzed through the potential difference between the CER and OER at a constant current density to illustrate the discrepancy in available chlorine content (ACC) of two kinds of oxide electrodes in the EO water preparation. In addition, the accelerated service lifetime of the IrO2-Ta2O5-TiO2 electrode was also discussed in this article. © 2018 Elsevier B.V.

语种： 英文

作者： Hu, Liming;Yan, Juntao*;Wang, Chunlei;Chai, Bo;Li, Jianfen*

期刊： 催化学报(英文),2019年40(3):458-469 ISSN：0253-9837

通讯作者： Yan, Juntao;Li, Jianfen

作者机构： [Li, Jianfen; Wang, Chunlei; Hu, Liming; Chai, Bo; Yan, Juntao] Wuhan Polytech Univ, Coll Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Yan, JT; Li, JF] W;Wuhan Polytech Univ, Coll Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

会议名称： Chinese Symposium on Photocatalytic Materials (CSPM)

会议时间： JUL 26-29, 2018

会议地点： Wuhan Univ Technol, Wuhan, PEOPLES R CHINA

会议主办单位： Wuhan Univ Technol

关键词： Electrospinning;Photocatalysis;Ternary heterojunction;Z-scheme TiO2/g-C3N4/RGO

摘要： A series of Z-scheme TiO2/g-C3N4/RGO ternary heterojunction photocatalysts are successfully constructed via a direct electrospinning technique coupled with an annealing process for the first time. They are investigated comprehensively in terms of crystal structure, morphology, composition, specific surface area, photoelectrochemical properties, photodegradation performance, etc. Compared with binary TiO2/g-C3N4 and single-component photocatalysts, ternary heterojunction photocatalysts show the best photodegradation performance for RhB under stimulated sunlight. This can be attributed to the enlarged specific surface area (111.41 m2/g), the formation of Z-scheme heterojunction, and the high separation migration efficiency of photoexcited charge carriers. A potential Z-scheme mechanism for ternary heterojunction photocatalysts is proposed to elucidate the remarkably ameliorated photocatalytic performance based on active species trapping experiments, PL detection test of hydroxyl radicals, and photoelectrochemical properties.

语种： 英文

作者： Ren, Zhandong*;Jin, Lingzhi;Deng, Li;Ming, Ruoxi;Zhang, Ailian;...

期刊： Sustainable Energy & Fuels,2019年3(9):2321-2328 ISSN：2398-4902

通讯作者： Ren, Zhandong;Zhu, Yuchan

作者机构： [Jin, Lingzhi; Deng, Li; Zhu, Yuchan; Ming, Ruoxi; Ren, Zhandong; Zhu, YC; Zhou, Xiaorong; Chai, Bo; Zhang, Ailian] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Ren, ZD; Zhu, YC] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

摘要： With increasing demands for clean and renewable energy, electrocatalytic water splitting is considered as the most promising procedure of hydrogen production. Pt is the best catalyst for the hydrogen evolution reaction (HER). However, the low oxygen evolution reaction (OER) activity of Pt prevents it from becoming a bifunctional catalyst in practical application. Ir-based electrocatalysts with good OER activities are expected to become the most promising bifunctional catalysts once their HER activities are improved. Herein, we report a simple synthesis of a Si-doped Ir electrode using magnetron sputtering. The physical and electrochemical characterization of the materials is achieved by scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray fluorescence (XRF), X-ray diffraction (XRD) and X-ray photoelectron spectrometry (XPS). The electrochemical catalytic activity of the Si-doped Ir electrode toward the HER is demonstrated for the first time. Cyclic voltammetry (CV) curves reveal that the addition of Si can improve the utilization rate of Ir and result in a large electrochemical surface area (ESA). The overpotential of the Si-doped Ir electrode for the HER (eta = 114 mV, 50 mA cm(-2)) is obviously lower than that of an Ir electrode (eta = 148 mV, 50 mA cm(-2)) and very close to that of a Pt electrode (eta = 106 mV, 50 mA cm(-2)). The mass specific activity of the Si-doped Ir electrode exceeds that of an Ir electrode by a factor of ca. 2 at an overpotential of eta = 200 mV. The superior HER activity of the Si-doped Ir electrode could be attributed to the electronic structure modification of Ir by the interaction effect with Si as studied through XPS analysis. Moreover, the Tafel slope of 36.5 mV dec(-1) suggests that the mechanism for the Si-doped Ir electrode-catalyzed HER is Volmer-Tafel, in which the recombination of two adsorbed hydrogen atoms is the rate-determining step. In addition, the OER activity of the Si-doped Ir electrode outperforms that of an Ir electrode, which enables the Si-doped Ir electrode to be used as a bifunctional catalyst for overall water electrolysis.

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： 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*;Liu, Chun;Yan, Juntao;Ren, Zhandong;Wang, Zhou-jun

期刊： Applied Surface Science,2018年448:1-8 ISSN：0169-4332

通讯作者： Chai, Bo

作者机构： [Chai, Bo; Liu, Chun; Yan, Juntao; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.;[Wang, Zhou-jun] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China.

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

关键词： Charge carriers;Composites;Separation;Z-scheme

摘要： The Z-scheme photocatalysts of WO3/g-C3N4 composites with WO3 nanoplates anchored on the surface of g-C3N4 were synthesized by in-situ acidic precipitation and following calcination procedure. The resultant photocatalysts were characterized by various analytical techniques. This face-to-face intimate contact between g-C3N4 and plate-like WO3 not only increases the interfacial contact areas, but also facilitates the transfer and separation of photogenerated charge carriers. The photocatalytic activities of degradation Rhodamine (RhB) solution over WO3/g-C3N4 composites were evaluated under visible light irradiation. The enhanced photocatalytic activity of WO3/g-C3N4 composite could be attributed to the formation of the Z-scheme heterojunction system based on the active species trapping and hydroxyl radicals photoluminescence (PL) detection experiments. Furthermore, electrochemical impedance spectroscopy (EIS) and transient photocurrent measurements confirm the more efficient separation and transfer of photogenerated charge carriers on the WO3/g-C3N4 composite than that of pure WO3 or g-C3N4. This work would provide new insights into the design and preparation of face-to-face contact heterojunction photocatalysts for organic contaminant removal.

语种： 英文

作者： Chai, Bo*;Xu, Mengqiu;Wang, Chunlei;Yan, Juntao;Ren, Zhandong

期刊： Catalysis Communications,2018年110:10-13 ISSN：1566-7367

通讯作者： Chai, Bo

作者机构： [Xu, Mengqiu; Wang, Chunlei; Chai, Bo; Yan, Juntao; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

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

关键词： Charge carriers;Composite;Photocatalytic H2 evolution;Separation

摘要： CdMoO<inf>4</inf>/CdS@MoS<inf>2</inf>ternary composite with MoS<inf>2</inf>anchoring on the surface of CdMoO<inf>4</inf>/CdS were synthesized by a one-step hydrothermal approach and characterized by the corresponding techniques. The photocatalytic H<inf>2</inf>evolution activities were measured and compared with lactic acid as a sacrificial reagent. The results showed that the CdMoO<inf>4</inf>/CdS@MoS<inf>2</inf>ternary composite exhibited more efficient photocatalytic H<inf>2</inf>evolution activity than those of CdMoO<inf>4</inf>/CdS, MoS<inf>2</inf>/CdMoO<inf>4</inf>, and MoS<inf>2</inf>/CdS binary composites. The significantly improved photocatalytic H<inf>2</inf>evolution activity could be attributed to more effective separation of photogenerated charge carriers over the CdMoO<inf>4</inf>/CdS@MoS<inf>2</inf>ternary composite.<br/> &copy;2018 Elsevier B.V.

语种： 英文

作者： 徐梦秋;柴波;闫俊涛;王春蕾;任占冬

期刊： 硅酸盐学报,2018年46(1):93-100 ISSN：0454-5648

通讯作者： Chai, B.

作者机构： [徐梦秋; 柴波; 闫俊涛; 王春蕾; 任占冬] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, China

通讯机构： School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, China

关键词： 钼酸铋;磷酸银;复合光催化剂;光催化降解;罗丹明B

摘要： 以片状的Bi_2MoO_6为前驱物,通过原位化学沉淀法制备了Bi_2MoO_6/Ag_3PO_4复合光催化剂,考察了其光催化降解罗丹明B(RhB)的活性。研究表明:Bi_2MoO_6和Ag_3PO_4复合可显著提高光催化活性,Bi_2MoO_6和Ag_3PO_4匹配的能级结构有利于光生电子和空穴的分离,延长光生载流子的寿命;当Bi_2MoO_6的质量分数为35%时,复合光催化剂具有最佳的光催化活性。

语种： 中文

作者： Ming, Ruoxi;Zhu, Yuchan;Deng, Li;Zhang, Ailian;Wang, Ju;...

期刊： NEW JOURNAL OF CHEMISTRY,2018年42(14):12143-12151 ISSN：1144-0546

通讯作者： Ren, Zhandong

作者机构： [Deng, Li; Zhu, Yuchan; Ming, Ruoxi; Wang, Ju; Chai, Bo; Zhang, Ailian; Han, Yongqi; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

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

关键词： electrolyzed oxidizing water;iridium;oxidizing agent;platinum;ruthenium;unclassified drug;water;Article;chemical parameters;current density;electrolysis;energy consumption;heating;instrument sterilization;ion exchange;lifespan;physical parameters;priority journal;temperature

摘要： Electrolyzed oxidizing water (EO water) bactericide is an indirect electrochemical sterilization technology, which is characterized by broad-spectrum, rapid and powerful sterilization. EO water, with a certain amount of available chlorine content (ACC), is generated by electrolysis of an extremely dilute NaCl solution. It is very important to study the preparation process of EO water, including electrode material and electrolytic process. In this paper, the effect of electrode material (platinum, iridium or ruthenium) on the physical and chemical parameters of EO water was investigated first. The effect of electrode composition and roasting temperature on the ACC of EO water was rigorously analyzed. The sterilization effect of EO water produced by different electrode materials was further discussed. In addition, the accelerated service lifetime of the electrode and exchange electrode polarity electrolysis were also investigated. Next, for the electrolysis process, the effects of ion exchange membrane type, current density and electrolyte concentration on the ACC of EO water, anode current efficiency and energy consumption were also studied. Finally, the stability of EO water, that is, the influence of illumination, heating and stirring on the physical and chemical parameters of EO water, was also observed in detail. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2018.

语种： 英文

作者： Luo, Qiang*;Chai, Bo;Xu, Mengqiu;Cai, Qizhou

期刊： APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,2018年124(7):1-8 ISSN：0947-8396

通讯作者： Luo, Qiang

作者机构： [Luo, Qiang] Wuhan Polytech Univ, Sch Mech Engn, Wuhan 430048, Hubei, Peoples R China.;[Xu, Mengqiu; Chai, Bo] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.;[Cai, Qizhou] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Mould Technol, Wuhan 430074, Hubei, Peoples R China.

通讯机构： [Luo, Qiang] W;Wuhan Polytech Univ, Sch Mech Engn, Wuhan 430048, Hubei, Peoples R China.

摘要： TiO2-loaded Ti3C2 with small interlayer spacing [TiO2/Ti3C2(SIS)] was successfully synthesized through hydrothermal treatment and subsequent calcination under argon atmosphere. The phase composition, morphology and photophysical properties of Ti3C2, TiO2 and TiO2/Ti3C2(SIS) were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FSEM), transmission electron microscopy (TEM), UV–Vis spectrophotometry and fluorescence spectrophotometer, respectively. Furthermore, the photocatalytic activities of Ti3C2, TiO2 and TiO2/Ti3C2(SIS) were measured through monitoring photodegradation of methylene blue (MB) under ultraviolet (UV) light irradiation. The results showed that TiO2/Ti3C2(SIS) had an interfacial heterojunction between TiO2 and Ti3C2 with small interlayer spacing, leading to obviously improved optical absorbability and light quantum efficiency. Furthermore, the results of photocatalytic experiment indicated that TiO2/Ti3C2(SIS) exhibited significantly improved photocataytic activity compared with Ti3C2 and TiO2.

语种： 英文