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Bi与rGO共修饰SnO2光催化高效降解TCH和染料研究

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Indexed by:Journal Papers

Date of Publication:2019-05-24

Journal:安全与环境学报

Included Journals:PKU

Volume:19

Issue:3

Page Number:992-1002

ISSN No.:1009-6094

Key Words:环境工程学;光催化;可见光;二氧化锡;铋;还原氧化石墨烯

Abstract:通过简单水热法制备新型铋金属(Bi)与还原氧化石墨烯(rGO)共修饰SnO2三元光催化剂,并采用多种手段对其进行表征.以亚甲基蓝(MB)和四环素(TCH)为目标污染物,考察三元材料对污染物的光催化降解性能.结果 表明,在可见光条件下,复合光催化材料对四环素去除率为94.1%(60 min),对亚甲基蓝去除率为75.5%(120 min),降解效果显著好于纯SnO2与二元催化剂Bi-SnO2.光致发光光谱(PL)、瞬态光电流响应和电化学阻抗谱(EIS)结果表明,复合材料中电子转移及分离效率的提升显著提高了自由基的产生及光催化效率.阐述了铋金属、还原氧化石墨烯和二氧化锡中间的协同效应,并基于自由基掩蔽试验和电子自旋共振谱(ESR)提出了光催化机制.

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