Tuning photocatalytic performance of Cs3Bi2Br9 perovskite by g-C3N4 for C(sp3)—H bond activation

被引：0
作者：
Zhang-Jun Bai
Yu Mao
Bing-Hao Wang
Lang Chen
Sheng Tian
Biao Hu
You-Ji Li
Chak-Tong Au
Shuang-Feng Yin
机构：
[1] Hunan University,Advanced Catalytic Engineering Research Center of the Ministry of Education, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering
[2] Jishou University,Key Laboratory of Mineral Cleaner Production and Exploit of Green Functional Materials in Hunan Province
[3] Fuzhou University,College of Chemical Engineering
来源：
Nano Research | 2023年 / 16卷
关键词：
photocatalysis; Cs; Bi; Br; /g-C; N; heterojunction; selective oxidation; toluene; benzaldehyde;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
All-inorganic halide perovskite (IHP) has been deemed promising in photocatalysis due to tunable bandgap and long lifetime of charge carriers. However, unsatisfactory photocatalytic activity and low stability prevent its practical applications. Rational construction of heterojunctions has been proved to be an efficient way to circumvent these obstacles. Herein, g-C3N4 nanosheet was employed to construct a 2D/2D (2D: two-dimensional) heterostructure with Cs3Bi2Br9 through an electrostatic self-assembly process. Owing to the efficient transfer of photogenerated charge carriers, the activity of Cs3Bi2Br9 was boosted with enhanced generation of carbon centered radicals. The optimized 10% Cs3Bi2Br9/g-C3N4 composite displays the highest benzaldehyde formation rate of 4.53 mmol·h−1g−1 under visible light, which is 41.8 and 2.3 times that of individual g-C3N4 and Cs3Bi2Br9, respectively. The stability of Cs3Bi2Br9 nanosheets and its selectivity for benzaldehyde (from 65% of Cs3Bi2Br9 to 90% of the composite) was enhanced by reducing its surface energy and tuning the reaction pathway, respectively.
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页码：6104 / 6112
页数：8
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