In situ construction of biocompatible Z-scheme α-Bi2O3/CuBi2O4 heterojunction for NO removal under visible light

被引：120
作者：
Chen, Qian [1 ]
Long, Huimin [1 ]
Chen, Meijuan [2 ]
Rao, Yongfang [1 ]
Li, Xinwei [4 ,5 ]
Huang, Yu [3 ,4 ]
机构：
[1] Xi Jiaotong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China
[3] Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710075, Peoples R China
[4] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol SKLLQG, Xian 710075, Peoples R China
[5] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 272卷
关键词：
In situ synthesis; Z-scheme heterojunction; Photocatalytic NO removal; In situ DRIFTS; Cytotoxicity; SELF-SACRIFICIAL SYNTHESIS; PHOTOCATALYTIC NO; BI METAL; CHARGE-TRANSFER; ELECTRIC-FIELD; PERFORMANCE; OXIDE; MECHANISM; TETRACYCLINE; DEGRADATION;
D O I：
10.1016/j.apcatb.2020.119008
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The design of efficient, stable and biocompatible photocatalysts for air purification is still a challenge. In this work, we report a Z-scheme alpha-Bi2O3/CuBi2O4 composite with high-quality interfaces using an in situ synthesis method. The alpha-Bi2O3/CuBi2O4 displays significantly enhanced photocatalytic activity for NO removal (30 %) in comparison with alpha-Bi2O3 (17 %) under visible light irradiation. Based on characterizations, theoretical calculations and ESR tests, the Z-scheme migration mechanism of photoinduced electrons and holes on alpha-Bi2O3/CuBi2O4 heterojunction was proposed. The formation of intermediates and products was monitored by in situ DRIFTS. The NO adsorption and activation on alpha-Bi2O3/CuBi2O4 surface are more favorable than that on alpha-Bi2O3 surface. The alpha-Bi2O3/CuBi2O4 also shows high selectivity for the conversion of NO to NO- 3. Moreover, the cytotoxicity of alpha-Bi2O3/CuBi2O4 exposed to human alveolar epithelial cell has been evaluated for its potential application in air purification. This work provides a new perspective regarding the design of Z-scheme heterojunctions by an in situ method and a promising photocatalyst suitable for air pollution control.
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页数：8
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