空位缺陷
光催化
锡
硫黄
带隙
材料科学
硫化物
降级(电信)
电化学
价(化学)
纳米技术
化学工程
无机化学
化学
催化作用
冶金
结晶学
光电子学
物理化学
电极
工程类
有机化学
电信
计算机科学
作者
Langang Li,Zichun Chai,Wei Jin,Hui Sun,Junhui He,Guoqing Wu,Weiwei Xia
标识
DOI:10.1016/j.jallcom.2022.167658
摘要
SnS2 with nanoflake-based microstructure and different concentrations of sulfur vacancy (SV) has been synthesized. The valence state of tin cation in the precursors is found to be closely related to the SV concentration in SnS2 nanoflake. SnS2 nanoflake with unsaturated tin cation in tin salt precursor (SnCl2·2H2O) favors to create SV. Sufficient SV is found to bring about a number of advantages such as smaller energy band gap, larger electrochemical active surface Area (ECSA), improved light absorption and separation efficiency of photogenerated charge carriers, which results in superior photocatalytic activities for degradation of RhB and CO2. SnS2 with more sulfur vacancies exhibits better photocatalytic activity for RhB degradation with a degradation rate 1.02×10−2min−1 and for CO2 reduction with an average CO production rate 2.44μmol∙g−1∙h−1. Above results not only reveal the importance of defect engineering, but also provide valuable guide to develop effective metal-sulfide photocatalysts for organic pollutant degradation and CO2 reduction.
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