Citation: Mingpu Kou, Yu Deng, Rumeng Zhang, Li Wang, Po Keung Wong, Fengyun Su, Liqun Ye. Molecular oxygen activation enhancement by BiOBr_0.5I_0.5/BiOI utilizing the synergistic effect of solid solution and heterojunctions for photocatalytic NO removal[J]. Chinese Journal of Catalysis, ;2020, 41(10): 1480-1487. doi: 10.1016/S1872-2067(20)63607-5 shu

Molecular oxygen activation enhancement by BiOBr_0.5I_0.5/BiOI utilizing the synergistic effect of solid solution and heterojunctions for photocatalytic NO removal

Mingpu Kou ^a,b, ,
Yu Deng ^b ,
Rumeng Zhang ^a,b ,
Li Wang ^a ,
Po Keung Wong ^c ,
Fengyun Su ^a ,
Liqun Ye ^a,b

a Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, Henan, China;
b College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang 443002, Hubei, China;
c School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China

Received Date: 26 February 2020
Revised Date: 22 March 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (51872147, 21671113), the 111 Project (D20015), and the Program for Innovative Research Team of Science and Technology in the University of Henan Province (19IRTSTHN025).

To improve the photocatalytic oxidation reaction activity for NO removal, photocatalysts with excellent activity are required to activate molecular oxygen. Solid solution and heterojunction were suggested as effective strategies to enhance the molecular oxygen activation viaexciton and carrier photocatalysis. In this study, a solid solution and heterojunction containing BiOBr_0.5I_0.5/BiOI catalyst was synthesized, and it showed improved photocatalytic activity for removing NO. The photocatalytic NO removal mechanism indicated that synergistic effects between the solid solution and heterojunction induced the enhanced activity for molecular oxygen activation. The photogenerated holes, superoxide, and singlet oxygen generated by the carrier and exciton photocatalysis supported the high photocatalytic NO removal efficiency. This study provides new ideas for designing efficient Bi-O-X (X=Cl, Br, I) photocatalysts for oxidation reactions.
- BiOBr_0.5I_0.5/BiOI,
- NO removal,
- Molecular oxygen activation,
- Carrier,
- Exciton
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Molecular oxygen activation enhancement by BiOBr0.5I0.5/BiOI utilizing the synergistic effect of solid solution and heterojunctions for photocatalytic NO removal

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通讯作者: 陈斌, bchen63@163.com

Molecular oxygen activation enhancement by BiOBr_0.5I_0.5/BiOI utilizing the synergistic effect of solid solution and heterojunctions for photocatalytic NO removal