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首页> 外文期刊>Chemosphere >Construction of Z-Scheme g-C_3N_4/RGO/WO_3 with in situ photoreduced graphene oxide as electron mediator for efficient photocatalytic degradation of ciprofloxacin
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Construction of Z-Scheme g-C_3N_4/RGO/WO_3 with in situ photoreduced graphene oxide as electron mediator for efficient photocatalytic degradation of ciprofloxacin

机译：以原位光还原氧化石墨烯为电子介体的Z-方案g-C_3N_4 / RGO / WO_3的构建，以有效地光催化降解环丙沙星

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摘要

Z-scheme photocatalyst g-C3N4/RGO/WO3 with reduced graphene oxide (RGO) as the electron mediator was synthesized via a facile photoreduction method. According the results of photoluminescence (PL), electrochemical impedance spectroscopy (EIS) and photocurrent response, g-C3N4/RGO/WO3 presents more efficient separation of charges and enhanced electronic mobility than g-C3N4/WO3, g-C3N4 and WO3, which benefits from the excellent electron transfer property of RGO. Reactive species trapping experiments and electron paramagnetic resonance (EPR) test demonstrated that superoxide radical (center dot O-2(-) ) and hydroxyl radical (center dot OH) were produced because of the high redox capacities caused by the unique transfer behaviors of charges in Z-scheme photocatalyst g-C3N4/RGO/WO3. In the absence of RGO as electron mediator, only holes (h(+)) participates the degradation process of ciprofloxacin (CIP) due to the decreased redox capacities of g-C3N4/WO3 compared with g-C3N4/RGO/WO3. Therefore, the degradation rate of Ciprofloxacin (CIP) over g-C3N4/RGO/WO3 composite was nearly twice as much as that over gC(3)N(4)/WO3. In addition, the analysis of intermediates provides insight into the degradation pathway of CIP. (C) 2018 Elsevier Ltd. All rights reserved.
机译：通过简便的光还原法合成了以氧化石墨烯（RGO）为电子介体的Z型光催化剂g-C3N4 / RGO / WO3。根据光致发光（PL），电化学阻抗谱（EIS）和光电流响应的结果，与g-C3N4 / WO3，g-C3N4和WO3相比，g-C3N4 / RGO / WO3表现出更有效的电荷分离和增强的电子迁移率。得益于RGO出色的电子转移性能。反应性物种捕获实验和电子顺磁共振（EPR）测试表明，由于电荷独特的转移行为引起的高氧化还原容量，产生了超氧自由基（中心点O-2（-））和羟基自由基（中心点OH）。在Z型光催化剂g-C3N4 / RGO / WO3中在没有RGO作为电子介体的情况下，由于与g-C3N4 / RGO / WO3相比，g-C3N4 / WO3的氧化还原能力降低，因此只有空穴（h（+））参与环丙沙星（CIP）的降解过程。因此，环丙沙星（CIP）在g-C3N4 / RGO / WO3复合材料上的降解速率几乎是在gC（3）N（4）/ WO3上降解速率的两倍。此外，对中间体的分析还提供了对CIP降解途径的了解。 （C）2018 Elsevier Ltd.保留所有权利。

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  • 来源
    《Chemosphere》 |2019年第1期|444-453|共10页
  • 作者

    Lu Na; Wang Pu; Su Yan; Yu Hongtao; Liu Ning; Quan Xie;

  • 作者单位

    Dalian Univ Technol, Minist Educ, Key Lab Ind Ecol & Environm Engn, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Sch Environm Sci & Technol, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Fac Chem Environm & Biol Sci & Technol, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Sch Elect Engn, Dalian 116024, 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《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Photocatalysis; Z-Scheme; Electron mediator; g-C3N4/RGO/WO3; Ciprofloxacin;

    机译：光催化;Z-方案;电子介体;g-C3N4 / RGO / WO3;环丙沙星;

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