摘要
利用离子液体辅助醇热法制备了具有较高活性的Bi_2WO_6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Bi_2WO_6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.
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 per-formance 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 frac-tion） Ag/Bi and photo-reduction time of 20 min has been confirmed to have the best photocatalytic activity.
出处
《上海师范大学学报（自然科学版）》
2016年第6期670-675,共6页
Journal of Shanghai Normal University(Natural Sciences)
基金
国家自然科学基金(21577092
21237003)
上海市科学技术委员会(15520711300)
