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首页> 外文期刊>Journal of Hazardous Materials >Bio-photoelectrochemcial system constructed with BiVO_4/RGO photocathode for 2,4-dichlorophenol degradation: BiVO_4/RGO optimization, degradation performance and mechanism
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Bio-photoelectrochemcial system constructed with BiVO_4/RGO photocathode for 2,4-dichlorophenol degradation: BiVO_4/RGO optimization, degradation performance and mechanism

机译：用Bivo_4 / Rgo光电处理的生物光电化学系统进行2,4-二氯苯酚降解：Bivo_4 / Rgo优化，降解性能和机制

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摘要

A single-chamber bio-photoelectrochemical system (BPES) constructed with BiVO4/reduced graphene oxide (RGO) photocathode was proposed for 2,4-dichlorophenol (2,4-DCP) degradation under simulated solar irradiation. The BiVO4/RGO (B/G) composites were synthesized, optimized and characterized by various techniques to analyze their physico-chemical and photocatalytic properties. Results showed that B/G (5 wt% - 9 h - 150 degrees C) exhibited the best photocatalytic activity for 2,4-DCP degradation, which was 1.5 times of that of BiVO4, due to its better light absorption, faster electrons transfer, and more efficient photo-generated e(-) - h(+) separation. Reactive species trapping experiments revealed that center dot OH was the main radical leading to 2,4-DCP degradation, and h+ also influenced 2,4-DCP removal. The 2,4-DCP (20 mg/L) removal rate and current output from the illuminated BPES were much higher than those of the unilluminated reactor (68.5 % vs. 41.8 %, 60.31 A/m(3) vs. 40.07 A/m(3)) in 24 h, and the cathode potential was more negative, indicating that photocathode catalytic process was favorable to pollutants degradation and energy generation. Intermediates of 2,4-DCP degradation in the BPES were identified, and accordingly, possible degradation pathway and mechanism were proposed. This research advanced the development of efficient photocathode and mechanism of recalcitrant wastewater treatment in the BPES.
机译：用BiVo4 / Speed氧化石墨烯（RGO）光电阴极构成的单室生物光电化学系统（BPES）在模拟的太阳照射下为2,4-二氯苯酚（2,4-DCP）降解。通过各种技术合成，优化和表征Bivo4 / Rgo（B / G）复合材料，以分析其物理化学和光催化性能。结果表明，B / g（5wt％ - 9h-150℃）表现出2,4-DCP降解的最佳光催化活性，这是BIVO4的1.5倍，因为它更好的光吸收，更快的电子转移，更有效的照片生成的E（ - ） - h（+）分离。反应性物种诱捕实验表明，中心点OH是导致2,4-DCP降解的主要自由基，H +也影响了2,4-DCP去除。来自照明BPE的2,4-DCP（20mg / L）去除率和电流输出远高于未启任反应器（68.5％vs.41.8％，60.31A / m（3）与40.07 A / M（3））在24小时，阴极电位更为阴性，表明光电阴极催化过程有利于污染物降解和能量产生。鉴定了BPE中2,4-DCP降解的中间体，因此提出了可能的降解途径和机理。本研究提出了高效光电阴极的发展和BPE中顽抗废水处理的机制。

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  • 来源
    《Journal of Hazardous Materials》 |2020年第may5期|121917.1-121917.14|共14页
  • 作者

    Tu Lingli; Hou Yanping; Yuan Guiyun; Yu Zebin; Qin Shanming; Yan Yimin; Zhu Hongxiang; Lin Hongfei; Chen Yongli; Wang Shuangfei;

  • 作者单位

    Guangxi Univ Sch Resources Environm & Mat Nanning 530004 Peoples R China;

    Guangxi Univ Sch Resources Environm & Mat Nanning 530004 Peoples R China|Guangxi Key Lab Clean Pulp & Papermaking & Pollut Nanning 530004 Peoples R China;

    Guangxi Univ Sch Resources Environm & Mat Nanning 530004 Peoples R China;

    Guangxi Univ Sch Resources Environm & Mat Nanning 530004 Peoples R China;

    Guangxi Univ Sch Resources Environm & Mat Nanning 530004 Peoples R China;

    Guangxi Univ Sch Resources Environm & Mat Nanning 530004 Peoples R China;

    Guangxi Key Lab Clean Pulp & Papermaking & Pollut Nanning 530004 Peoples R China|Guangxi Univ Coll Light Ind & Food Engn Nanning 530004 Peoples R China|Guangxi Bossco Environm Protect Technol Co Ltd 12 Kexin Rd Nanning 530007 Peoples R China;

    Guangxi Bossco Environm Protect Technol Co Ltd 12 Kexin Rd Nanning 530007 Peoples R China;

    Guangxi Bossco Environm Protect Technol Co Ltd 12 Kexin Rd Nanning 530007 Peoples R China;

    Guangxi Key Lab Clean Pulp & Papermaking & Pollut Nanning 530004 Peoples R China|Guangxi Univ Coll Light Ind & Food Engn Nanning 530004 Peoples R China|Guangxi Bossco Environm Protect Technol Co Ltd 12 Kexin Rd Nanning 530007 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bio-photoelectrochemcial system; BiVO4/RGO photocathode; 2, 4-Dichlorophenol; Intermediates; Degradation mechanism;

    机译：生物光电化学系统;Bivo4 / Rgo光电阴极;2,4-二氯苯酚;中间体;降解机制;

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