可见光下新型 Ca-AgPO 复合材料光催化去除菲和藻类：反应活性和共存效应。
Photocatalytic removal of phenanthrene and algae by a novel Ca-AgPO composite under visible light: Reactivity and coexisting effect.
机构信息
School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China; Department of Civil and Environment Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
Department of Civil and Environment Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China.
出版信息
Chemosphere. 2019 Apr;221:511-518. doi: 10.1016/j.chemosphere.2019.01.044. Epub 2019 Jan 10.
In this study, the feasibility of a novel Ca-AgPO composite with visible light irradiation for the phenanthrene (PHE) degradation and algae inactivation in artificial seawater was firstly investigated. The experimental findings revealed that AgPO phase was sucessfully formed on the Ca-based material, and the presence of Ca-based material could effectively keep AgPO particles stable. An excellent performance on PHE degradation or algae inactivation was observed from Ca-AgPO composite under visible light irradiation. The degradation of PHE or inactivation of algae not only could be efficiently achieved in the single mode, but also could be successfully achieved in the coexisting mode. Above 96% of PHE and algae were simultaneously removed within 12 h in the Ca-AgPO/visible light system. It was further observed that the degradation of PHE and/or inactivation of algae increased with the increase of Ca-AgPO dosage. HO was the primary radical responsible for PHE degradation, whereas HO and Ag released from Ca-AgPO mainly contributed to the algae inactivation. A possible mechanism involving the catalytic removal of PHE and algae by Ca-AgPO under visible light irradiation was proposed. This study provides helpful guide for the simultaneous removal of various pollutants in real seawater.
在这项研究中，首次研究了具有可见光照射的新型 Ca-AgPO 复合材料在人工海水中降解菲（PHE）和灭活藻类的可行性。实验结果表明，AgPO 相成功地形成在 Ca 基材料上，而 Ca 基材料的存在可以有效地保持 AgPO 颗粒的稳定性。在可见光照射下，Ca-AgPO 复合材料表现出优异的 PHE 降解或藻类灭活性能。PHE 的降解或藻类的灭活不仅可以在单一模式下高效实现，也可以在共存模式下成功实现。在 Ca-AgPO/可见光体系中，PHE 和藻类在 12 小时内同时去除率超过 96%。进一步观察到，随着 Ca-AgPO 用量的增加，PHE 的降解和/或藻类的灭活增加。HO 是降解 PHE 的主要自由基，而 Ca-AgPO 释放的 HO 和 Ag 主要导致藻类失活。提出了一种涉及 Ca-AgPO 在可见光照射下催化去除 PHE 和藻类的可能机制。本研究为实际海水中各种污染物的同时去除提供了有益的指导。
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