文献类型：期刊文献

英文题名：Photocatalytic degradation of rhodamine B by Bi2O3@LDHs S-scheme heterojunction: Performance, kinetics and mechanism

作者：Zhang, Lianyang[1];Meng, Yue[2,5];Shen, Hui[3];Li, Jinhua[3];Yang, Chunfang[3];Xie, Bo[4];Xia, Shengjie[4]

机构：[1]Shaoxing Univ, Coll Text & Fash, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing 312000, Zhejiang, Peoples R China;[2]Huzhou Univ, Sch Life Sci, 759 East Erhuan Rd, Huzhou 313000, Peoples R China;[3]Zhejiang Huayuan Pigment Co Ltd, Deqing 310024, Zhejiang, Peoples R China;[4]Zhejiang Univ Technol, Coll Chem Engn, Dept Chem, 18 Chaowang Rd, Hangzhou 310014, Peoples R China;[5]Huzhou Coll, Dept Life & Hlth Sci, Huzhou 313000, Peoples R China

年份：2021

卷号：567

外文期刊名：APPLIED SURFACE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000691188400004)、、WOS

基金：This work is supported by National Natural Science Foundation of China (92061126, 51871091, 21503188), Opening Project of Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province (QJRZ1901) and Zhejiang Leading Innovation and Entrepreneurship Team Project (2018R01008).

语种：英文

外文关键词：Layered Double Hydroxides (LDHs); Photodegradation; Dyes; Kinetic; Heterojunction

外文摘要：In this paper, based on Bi2O3 and CoAl-layered double hydroxides (LDHs), a core-shell structure S-scheme heterojunction catalyst (Bi2O3@LDHs) was synthesized and used for photodegradation of Rhodamine B (RhB), a typical dye. The effects of the amount of catalyst (A), light intensity (B), pH value (C) and reaction temperature (T) on the degradation performance were discussed. The apparent kinetic equation of RhB photodegradation catalyzed by LDHs and Bi2O3@LDHs are: ln(C/C-0) = -5.661 x 10(5)e(-30.01x103/RT) x [A](0)(0.9348) x [B](o)(1.0348) x [C](0)(0.9965) x t and ln(C/C-0) = -8.398 x 10(3)e(-16.39x103/RT) x [A](0)(1.2547) x [B](o)(1.5279) x [C](0)(1.0197) x t. Under the best reaction conditions of the amount of catalyst is 40 mg, the light intensity is 400 W, the reaction pH value is 9, and the reaction temperature is 303 K, the highest removal is 90.36%, and the activity is 37.65 mg g(-1)h(-1). In addition, by means of radical characterization and DFT calculation, the formation mechanism of built-in electric field and the promotion of S-scheme electron transport path in heterojunction were systematically analyzed, and the degradation intermediates and degradation paths were also discussed.