无机材料学报2021,Vol.36Issue(6):665-672,8.DOI:10.15541/jim20200356
CuS纳米片修饰Bi5O7I复合材料用于光催化还原Cr(VI)水溶液
CuS Nanosheet Decorated Bi5O7I Composite for the Enhanced Photocatalytic Reduction Activity of Aqueous Cr(VI)
摘要
Abstract
Photocatalytic approach has been extensively explored to remove toxic Cr(VI) in wastewater owing to its high efficient, safe and low cost features. Fabricating semiconductor composite is supposed to be an effective approach to improve the poor photocatalytic activity of single component. In this work, we prepared CuS nanosheets decorated Bi5O7I composites by a simple hydrothermal method, and characterized and evaluated its photoatalytic reduction activity of Cr(VI) under the visible-light irradiation. Compared to pure Bi5O7I microrods and CuS nanoparticles, the as-prepared CuS/Bi5O7I composites exhibits more efficient photocatalytic reduction of aqueous Cr(VI). The reaction rate constant of 15wt% CuS/Bi5O7I catalyst was 20 times and 4.3 times of that of pristine Bi5O7I and CuS, respectively. BET, photoluminescence and EIS spectra measurement demonstrate that the improved photocatalytic activity may be attributed to their higher surface areas, broader light absorption region, improved separation, and transfer efficiency of photo-induced electron-hole pairs. Moreover, a possible photocatalytic mechanism of CuS/Bi5O7I catalyst is also proposed.关键词
CuS/Bi5O7I复合光催化剂/可见光催化剂/光催化降解Cr(VI)Key words
CuS/Bi5O7I composite photocatalyst/visible-light photocatalyst/photocatalytic reduction of Cr(VI)分类
化学化工引用本文复制引用
蔡苗,陈子航,曾实,杜江慧,熊娟..CuS纳米片修饰Bi5O7I复合材料用于光催化还原Cr(VI)水溶液[J].无机材料学报,2021,36(6):665-672,8.基金项目
National Natural Science Foundation of China(51972102) (51972102)