Simultaneous removal of organic pollutants and heavy metals in wastewater by photoelectrocatalysis: A review.
Simultaneous removal of organic pollutants and heavy metals in wastewater by photoelectrocatalysis: A review.
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DOI：
10.1016/j.chemosphere.2020.128503
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发表时间：
2020-10
期刊：
影响因子：
8.8
通讯作者：
S. Ye;Yingxu Chen;Xiaoling Yao;Jingdong Zhang
中科院分区：
文献类型：
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作者：
S. Ye;Yingxu Chen;Xiaoling Yao;Jingdong Zhang
光电催化作为电化学和电化学相结合的一种强有力的技术，在过去的十年中被广泛地应用于同时去除废水中的有机物和重金属混合污染物。在光电催化体系中，偏压可以抑制光生电子-空穴对的复合，延长光生空穴的寿命，从而显著促进有机污染物在光阳极上的氧化。同时，一些光生电子被偏压驱动到阴极以还原重金属。本文综述了紫外光、可见光和太阳光下光电催化处理有机-重金属混合污染体系的研究进展。我们展示了影响光电催化去除有机污染物和重金属过程的主要操作变量。讨论了太阳能在光电催化中的应用问题。最后，对光电催化技术在工业应用中的发展前景进行了展望。
As a powerful technique by combining photocatalysis with electrochemistry, photoelectrocatalysis has been extensively explored to simultaneously remove mixed pollutants of organic and heavy metal in wastewater in the past decade. In the photoelectrocatalytic system, the bias potential can remarkably promote the oxidation of organic pollutants on the photoanode by suppressing the recombination of photogenerated electron-hole pairs and extending the lifetime of photogenerated holes. Meanwhile, some photogenerated electrons are driven by the bias potential to the cathode to reduce heavy metals. In this review, we summarize the research advances in photoelectrocatalytic treatment of organic-heavy metal mixed pollution systems under UV light, visible light and sunlight. We demonstrate the main operation variables affecting the photoelectrocatalytic removal processes of organic pollutants and heavy metals. The problems for utilization of solar energy in photoelectrocatalysis are discussed. Finally, this review proposes the perspectives for future development of photoelectrocatalysis to industrial applications.