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光还原法制备Ag/Bi2WO6可见光催化剂及其性能研究
潘改芳, 霍宇凝, 李和兴
上海师范大学
摘要:
利用离子液体辅助醇热法制备了具有较高活性的Bi2WO6可见光催化剂,并进一步采用光还原法将Ag纳米粒子负载到Bi2WO6催化剂表面.利用Ag良好的导电性以及表面plasma效应,有效增强了催化剂的可见光吸收,降低了光生载流子复合的几率,显著提高了污染物降解的光催化活性.同时确定了最佳Ag含量和反应条件.
关键词:  Ag/Bi2WO6催化剂  光还原法  可见光  污染物降解
DOI:
分类号:
基金项目:国家自然科学基金(21577092,21237003);上海市科学技术委员会(15520711300)
Ag/Bi2WO6 prepared by photo-reduction method and its visible-light photocatalytic activity
PAN Gaifang, HUO Yuning, LI Hexing
College of Life and Environmental Sciences,Shanghai Normal University
Abstract:
In this paper,an ionic liquid assisted solvothermal process has been developed to synthesize the Bi2WO6 photocatalyst.Furthermore,Ag/Bi2WO6 was prepared by aphoto-reduction method.The relationships between catalyst structure and catalysis performance were discussed in detail.Ag nanoparticles deposited on the surface of Bi2WO6 enhanced the absorption of visible light and improved the separation efficiency of the carrier via plasma resonance effect.Ag/Bi2WO6 catalyst with 0.75% (mole fraction) Ag/Bi and photo-reduction time of 20 min has been confirmed to have the best photocatalytic activity.
Key words:  Ag/Bi2WO6 catalyst  photo-reduction method  visible light  pollutant degradation