Citation: Li Zhang, Chao Yang, Kangle Lv, Yachao Lu, Qin Li, Xiaofeng Wu, Yuhan Li, Xiaofang Li, Jiajie Fan, Mei Li. SPR effect of bismuth enhanced visible photoreactivity of Bi₂WO₆ for NO abatement[J]. Chinese Journal of Catalysis, ;2019, 40(5): 755-764. doi: S1872-2067(19)63320-6 shu

SPR effect of bismuth enhanced visible photoreactivity of Bi₂WO₆ for NO abatement

Li Zhang ^a, ,
Chao Yang ^a ,
Kangle Lv ^a ,
Yachao Lu ^a ,
Qin Li ^a ,
Xiaofeng Wu ^a ,
Yuhan Li ^b ,
Xiaofang Li ^c ,
Jiajie Fan ^d ,
Mei Li ^a

a Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, Hubei, China;
b Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China;
c College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China;
d School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China

Received Date: 3 January 2019
Revised Date: 29 January 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (51672312, 21373275, 51808080, 21571192), the Fundamental Research Funds for the Central Univsrsity, South-Central University for Nationalities (CZT19006), the Natural Science Foundation Project of CQ CSTC (cstc2018jcyjA3794), China "

Bi₂WO₆ is a typical visible-light-responsive semiconductor photocatalyst with a layered structure. However, the relatively large bandgap (2.6-2.8 eV) and quick recombination of photo-generated carriers result in its low quantum efficiency. In this paper, Bi-nanospheres-modified flower-like Bi₂WO₆ was successfully prepared by solvothermal treatment of Bi₂WO₆ powders in Bi(NO₃)₃ solution using ethylene glycol as reductant. The photoreactivity of this photocatalyst was evaluated by the oxidation of NO in a continuous-flow reactor under irradiation by a visible LED lamp (λ > 400 nm). It was found that both Bi nanospheres and flower-like Bi₂WO₆ precursor exhibit very poor photocatalytic activity with NO removal rates of only 7.7% and 8.6%, respectively. The photoreactivity of Bi/Bi₂WO₆ was found to steadily increase from 12.3% to 53.1% with increase in the amount of Bi nanospheres from 0 to 10 wt%. However, with further increase in the loading amount of Bi nanospheres, the photoreactivity of Bi/Bi₂WO₆ hybridized photocatalyst begins to decrease, possibly due to the light filtering by the Bi nanospheres. The enhanced visible photoreactivity of Bi/Bi₂WO₆ towards NO abatement was attributed to surface plasmon resonance driven interfacial charge separation. The excellent stability of Bi/Bi₂WO₆ hybridized photocatalyst towards NO oxidation demonstrates its potential for applications such as air purification.
- Bismuth,
- Bi₂WO₆,
- Surface plasmon resonance,
- Photocatalysis,
- NO
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SPR effect of bismuth enhanced visible photoreactivity of Bi2WO6 for NO abatement

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SPR effect of bismuth enhanced visible photoreactivity of Bi₂WO₆ for NO abatement