Dual S-scheme graphitic carbon-doped α-Bi2O3/β-Bi2O3/Bi5O7I ternary heterojunction photocatalyst for the degradation of Bisphenol A

被引：46
作者：
Kan, Li [2 ]
Mu, Weina [1 ]
Chang, Chun [1 ,2 ]
Lian, Fei [3 ]
机构：
[1] Dalian Univ, Coll Environm & Chem Engn, Dalian 116622, Peoples R China
[2] Bohai Univ, Coll Chem & Mat Engn, Jinzhou 121013, Peoples R China
[3] Hebei Univ Technol, Sch Energy & Environm Engn, Tianjin 300401, Peoples R China
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2023年 / 312卷
关键词：
Dual S-scheme; Ternary heterojunction; Degradation mechanism; BPA; N-N HETEROJUNCTION; NITRIDE;
D O I：
10.1016/j.seppur.2023.123388
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Graphitic carbon-doped alpha-Bi2O3/beta-Bi2O3/Bi5O7I ternary heterojunction photocatalysts were synthesized by calcination of urea, malonic acid and BiOIO3 in a simple and low-cost way. The photocatalytic activity of the photocatalysts was evaluated by the degradation of Bisphenol A (BPA) under simulated sunlight irradiation. The reaction rate constants of graphitic carbon-doped alpha-Bi2O3/beta-Bi2O3/Bi5O7I were 4.6, 4.2, 17.8, and 231 times higher than those of BIO-550 (Bi5O7I), MA-BIO (alpha-Bi2O3/Bi5O7I), MACN and CN-BIO (alpha-Bi2O3/beta-Bi2O3), respectively. The enhanced photocatalytic activity is due to the high separation efficiency of heterogeneous photogenerated electron-hole pairs, which is caused by the synergistic effect of the heterojunction between the different components and the efficient electron transfer efficiency of graphitic carbon. In addition, a dual S -scheme heterojunction mechanism has been proposed to explain the excellent redox properties of the composites.
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页数：11
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