| BiVO4-Cu2O/CuO双光电极自偏压光电催化降解苯酚研究 |
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| 引用本文： | 李霞,崔玥昕,王雁,Abdul khaliq Jan,赵旭.BiVO4-Cu2O/CuO双光电极自偏压光电催化降解苯酚研究[J].环境科学学报,2018,38(11):4299-4305. |
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| 作者姓名： | 李霞 崔玥昕 王雁 Abdul khaliq Jan 赵旭 |
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| 作者单位： | 1. 北京首创股份有限公司, 北京 100028;2. 中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;3. 中国科学院大学, 北京 100049,1. 中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;2. 中国科学院大学, 北京 100049,中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085,1. 中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;2. Shaheed BB University Sheringal Dir, KPK, Pakistan,1. 中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;2. 中国科学院大学, 北京 100049 |
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| 基金项目： | 水体污染控制与治理科技重大专项（No.2017ZX07102-003）；国家自然科学基金（No.21377148，51708544） |
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| 摘 要： | 基于费米能级差,构建了以BiVO_4为光阳极,Cu_2O/CuO为光阴极的双光电极可见光响应光催化燃料电池体系,研究了该体系在不同氧化剂的辅助作用下光电催化降解苯酚的效率与动力学.结果表明,向该体系中投加H_2O_2可以显著促进苯酚的降解,且反应过程光电流稳定,铜溶出量低.详细探究了H_2O_2初始浓度、pH对降解的影响,结果表明在H_2O_2投加量为5 mmol·L~(-1),初始pH为3.5条件下利于苯酚降解,5 mg·L~(-1)的苯酚可在120 min内完全去除.顺磁共振和猝灭实验表明该体系的主要氧化物种为·OH、·O~-_2和光生空穴.该催化体系实现了苯酚在可见光下的高效催化降解.
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| 关 键 词： | 自偏压 光电催化氧化 过氧化氢 有机污染物 |
| 收稿时间： | 2018/2/22 0:00:00 |
| 修稿时间： | 2018/7/20 0:00:00 |
Photoelectrocatalytic degradation of phenol in a self-driven system with BiVO4-Cu2O/CuO dual photoelectrode |
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| LI Xi,CUI Yuexin,WANG Yan,Abdul khaliq Jan and ZHAO Xu.Photoelectrocatalytic degradation of phenol in a self-driven system with BiVO4-Cu2O/CuO dual photoelectrode[J].Acta Scientiae Circumstantiae,2018,38(11):4299-4305. |
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| Authors: | LI Xi CUI Yuexin WANG Yan Abdul khaliq Jan and ZHAO Xu |
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| Institution: | 1. Beijing Capital Co. Ltd., Beijing 100028;2. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085;3. University of Chinese Academy of Sciences, Beijing 100049,1. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085;2. University of Chinese Academy of Sciences, Beijing 100049,State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,1. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085;2. Shaheed BB University Sheringal Dir, KPK, Pakistan and 1. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085;2. University of Chinese Academy of Sciences, Beijing 100049 |
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| Abstract: | In this work, a self-driven photocatalytic fuel cell (PFC) system was constructed, which consisted of a BiVO4 photoanode and a Cu2O/CuO photocathode. The proposed PFC system was used for the degradation of phenol with the addition of oxidizing agents, which which could significantly enhance the degradation of phenol. The effect of initial concentration of H2O2 and initial pH on the removal of phenol was studied. The phenol can be completely removed in 120 min with the addition of 5 mmol·L-1 H2O2 to the PFC system and pH=3.5. Active free radicals involving·OH,·O2- and h+ were produced in this process, which were confirmed by electron spin resonance analysis and quenching experiment. The results showed that the H2O2 -PFC system greatly enhanced the phenol degradation process. |
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| Keywords: | self-bias photoelectrochemical oxidation H2O2 organic pollutant |
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