收稿日期: 2020-07-05
网络出版日期: 2020-09-03
基金资助
国家自然科学基金资助项目(2207020402);上海市科委资助项目(19DZ2293100);上海市科委资助项目(19DZ2293100)
Review on photocatalytic removal of heavy metals from water
Received date: 2020-07-05
Online published: 2020-09-03
许振民, 施利毅 . 光催化去除水体中重金属离子的研究进展[J]. 上海大学学报(自然科学版), 2020 , 26(4) : 491 -505 . DOI: 10.12066/j.issn.1007-2861.2245
Treatment of heavy metal pollution is challenging, and hence, is the focus of tackling environmental problems. Photocatalysis-based technologies provide a green and sustainable route to heavy metal removal. TiO$_{2}$ is regarded as the most suitable photocatalyst because of its unique photo- and electrochemical performances. However, its application under visible light and natural sunlight is limited due to its large band gap and high carrier recombination rate. This review summarises a series of photo catalysts that have been developed in the recent years for heavy metal removal. Strategies for improving the photocatalytic activity of TiO$_{2}$, which involve surface modification, metal/non-metal doping, immobilisation, and coupling with other semiconductors, were summarised; the corresponding reaction mechanisms were also discussed. Moreover, the status and drawbacks of the current research on the photocatalytic removal of heavy metals were critically discussed.
Key words： heavy metal; photocatalysis; TiO$_{2}$
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