期刊
APPLIED SURFACE SCIENCE
卷 567, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2021.150760
关键词
Layered Double Hydroxides (LDHs); Photodegradation; Dyes; Kinetic; Heterojunction
类别
资金
- National Natural Science Foundation of China [92061126, 51871091, 21503188]
- Opening Project of Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province [QJRZ1901]
- Zhejiang Leading Innovation and Entrepreneurship Team Project [2018R01008]
A core-shell structure S-scheme heterojunction catalyst (Bi2O3@LDHs) was synthesized and used for photodegradation of Rhodamine B. The effects of catalyst amount, light intensity, pH value, and reaction temperature on degradation performance were discussed, with the best removal rate reaching 90.36%. Radical characterization and DFT calculation were utilized to analyze the formation mechanism of built-in electric field and promotion of S-scheme electron transport path in the heterojunction, along with degradation intermediates and paths discussion.
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据