Facile ultrasonic-assisted synthesis of micro–nanosheet structure Bi_4Ti_3O_(12)/g-C_3N_4 composites with enhanced photocatalytic activity on organic pollutants

作     者：Huihui Gan Futao Yi Huining Zhang Yongxing Qian Huixia Jin Kefeng Zhang 

作者机构：School of Civil Engineering and Architecture Ningbo Institute of Technology Zhejiang University College of Environmental Science and Engineering Guilin University of Technology 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2018年第26卷第12期

页      面：2628-2635页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Supported by the National Natural Science Foundation of China(51509220) the Natural Science Foundation of Zhejiang Province(LQ14E090003) Ningbo Science and Technology Plan Projects(2014C50007,2014C51003) Ningbo major social development projects(2017C510006) 

主　　题：Rhodamine B Photocatalyst Ultrasonic assisted synthesis Bi4Ti3O12 g-C3N4 

摘      要：The Bi_4Ti_3O_(12)/g-C_3N_4 composites with microsheet and nanosheet structure were prepared through facile ultrasonic-assisted method. The SEM and TEM results suggested that the nanosheets g-C_3N_4 were stacked on the surface of regular Bi_4Ti_3O_(12) sheets. Comparing with pure Bi_4Ti_3O_(12) and g-C_3N_4, the Bi_4Ti_3O_(12)/g-C_3N_4 composites showed significant enhancement in photocatalytic efficiency for the degradation of RhB in solution. With the mass ratio of g-C_3N_4 increasing to 10 wt%, the Bi_4Ti_3O_(12)/g-C_3N_4-10% presented the best photocatalytic activity. Its photocatalysis reaction constant was approximately 2 times higher than the single component Bi_4Ti_3O_(12) or g-C_3N_4. Meanwhile, good stability and durability for the Bi_4Ti_3O_(12)/g-C_3N_4-10% were confirmed by the recycling experiment and FT-IR analysis. The possible mechanism for the improvements was the matched band positions and the effective separation of photo-excited electrons(e-) and holes(h+). Furthermore, based on the results of active species trapping, photo-generated holes(h+) and superoxide radical(·O2-) could be the main radicals in reaction.