Citation: Xiaoqian Xie, Qadeer-Ul Hassan, Huan Lu, Fei Rao, Jianzhi Gao, Gangqiang Zhu. In situ construction of oxygen-vacancy-rich Bi⁰@Bi₂WO_6-x microspheres with enhanced visible light photocatalytic for NO removal[J]. Chinese Chemical Letters, ;2021, 32(6): 2038-2042. doi: 10.1016/j.cclet.2020.10.002 shu

In situ construction of oxygen-vacancy-rich Bi⁰@Bi₂WO_6-x microspheres with enhanced visible light photocatalytic for NO removal

Xiaoqian Xie ^a ,
Qadeer-Ul Hassan ^a ,
Huan Lu ^{b, *,} ,
Fei Rao ^a ,
Jianzhi Gao ^{a, *,} ,
Gangqiang Zhu ^{a, *,}

a.
School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
b.
School of Geography and Tourism, Shaanxi Normal University, Xi'an 710062, China

huanlu@snnu.edu.cn

jianzhigao@snnu.edu.cn

zgq2006@snnu.edu.cn

Received Date: 8 July 2020
Revised Date: 3 September 2020
Accepted Date: 3 October 2020
Available Online: 6 October 2020

Figures(4)

Surface oxygen vacancy defects and metal deposition on semiconductor photocatalysts play a critical role in photocatalytic reactions. In this work, oxygen-deficient Bi₂WO₆ microspheres have been prepared by a facile ethylene glycol-assisted solvothermal method. Bi⁰ nanoparticles were reduced by in situ thermal-treatment on Bi₂WO₆ microspheres to obtain Bi⁰@Bi₂WO_6-x as well as maintaining the oxygen vacancies (OVs) under N₂ atmosphere. Afterwards, photocatalytic NO oxidation removal activities of these photocatalysts were investigated under visible light irradiation and Bi⁰@Bi₂WO_6-x shows the best NO removal activity than other samples. The photogenerated charge separation and transfer are promoted by Bi⁰ nanoparticles deposited on the surface of semiconductor catalysts. OVs defects promote the activation of reactants (H₂O and O₂), thereby enhancing the formation of the active substance. Moreover, both OVs defects and Bi⁰ metal have the characteristics of extending light absorption and enhancing the efficient utilization of solar energy. Besides, the photocatalytic NO oxidation mechanism of Bi⁰@Bi₂WO_6-x was investigated by in situ FTIR spectroscopy for reaction intermediates and final products. This work furnishes insight into the synthesis strategy and the underlying photocatalytic mechanism of the surface-modified Bi⁰@Bi₂WO_6-x composite for pollutants removal.
- Bi₂WO₆ microspheres,
- Oxygen vacancies,
- Bi metal,
- Photocatalytic reaction
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沈阳化工大学材料科学与工程学院沈阳 110142

In situ construction of oxygen-vacancy-rich Bi0@Bi2WO6-x microspheres with enhanced visible light photocatalytic for NO removal

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通讯作者: 陈斌, bchen63@163.com

In situ construction of oxygen-vacancy-rich Bi⁰@Bi₂WO_6-x microspheres with enhanced visible light photocatalytic for NO removal