作　　者： (杨佳）; (牛晓君）; (安少荣）; (陈伟仡）;

机构地区： 华南理工大学环境与能源学院,广东广州510006 工业聚集区污染控制与生态修复教育部重点实验室,广东广州510006 广东省大气环境与污染控制重点实验室,广东广州510006

出　　处： 《化工环保》 2017年第4期443-448,共6页

摘　　要： 采用原位氧化聚合法制备了PANI/Bi_2MoO_6复合光催化剂,采用XRD、SEM、PL和UV-Vis DRS等技术对其进行了表征,并将其用于罗丹明B(Rh B)的可见光催化降解。表征结果显示:聚苯胺(PANI)包覆于Bi_2MoO_6微球表面,促进了光生载流子的迁移,抑制了光生电子-空穴对的复合,拓宽了催化剂的可见光响应范围。实验结果表明:PANI/Bi_2MoO_6复合光催化剂具有较高的可见光催化活性和良好的稳定性,当w(PANI)为36%、光照90 min时Rh B去除率达90.4%,明显优于纯Bi_2MoO_6;该体系中,空穴和·O2-在污染物的降解过程中起主要作用;PANI和Bi_2MoO_6之间形成了异质结结构,使光生电子-空穴对有效分离。 PANI/Bi2MoO6 composite photocatalyst was prepared by in situ oxidative polymerization method, characterized by XRD, SEM, PL and UV-Vis DRS, and evaluated by visible-light photocatalytic degradation of Rhodamine B （RhB）. The characterization results showed that the surface of Bi2MoO6 microsphere was coated with polyaniline （PANI）, which contributed to the transfer of photo-induced cartier, inhibited the recombination of photo-generated electron and hole pairs, and expanded the visible-light response range of the catalysts. The experimental results showed that： The PANI/Bi2MoO6 composite exhibited high visible-light-driven photocatalytic activity and good stability; When w （PANI） was 36% and the irradiation time was 90 min, the RhB removal rate was 90.4%, which was much better than that on Bi2MoO6; In the reaction system, hole and O2 played the crucial roles in the pollutant degradation process; The heterojunction structure between PANI and Bi2MoO6 contributed to effective separation of the photo-generated electron and hole pairs.

关 键 词： 聚苯胺 光催化 可见光