Citation: Ning Li, Hang Gao, Xin Wang, Sujun Zhao, Da Lv, Guoqing Yang, Xueyun Gao, Haikuan Fan, Yangqin Gao, Lei Ge. Novel indirect Z-scheme g-C₃N₄/Bi₂MoO₆/Bi hollow microsphere heterojunctions with SPR-promoted visible absorption and highly enhanced photocatalytic performance[J]. Chinese Journal of Catalysis, ;2020, 41(3): 426-434. doi: S1872-2067(19)63478-9 shu

Novel indirect Z-scheme g-C₃N₄/Bi₂MoO₆/Bi hollow microsphere heterojunctions with SPR-promoted visible absorption and highly enhanced photocatalytic performance

Ning Li ^a,b,c, ,
Hang Gao ^b ,
Xin Wang ^b ,
Sujun Zhao ^b ,
Da Lv ^b ,
Guoqing Yang ^b ,
Xueyun Gao ^b ,
Haikuan Fan ^b ,
Yangqin Gao ^b ,
Lei Ge ^a,b

a State Key Laboratory of Heavy Oil Processing, China University of Petroleum Beijing, No. 18 Fuxue RD, Beijing 102249, China;
b Department of Materials Science and Engineering, College of New Energy and Material, China University of Petroleum Beijing, No. 18 Fuxue RD, Beijing 102249, China;
c Beijing Key Laboratory of Failure, Corrosion, and Protection of Oil/Gas Facilities, College of New Energy and Material, China University of Petroleum Beijing, Beijing 102249, China

Received Date: 1 July 2019
Revised Date: 2 August 2019

Fund Project: This work was financially supported by the Science Foundation of China University of Petroleum, Beijing (2462017YJRC048, 2462018BJC005), and the National Natural Science Foundation of China (51802351).

The surface plasmonic resonance (SPR) effect of Bi can effectively improve the light absorption abilities and photogenerated charge carrier separation rate. In this study, a novel ternary heterojunction of g-C₃N₄/Bi₂MoO₆/Bi (CN/BMO/Bi) hollow microsphere was successfully fabricated through solvothermal and in situ reduction methods. The results revealed that the optimal ternary 0.4CN/BMO/9Bi photocatalyst exhibited the highest photocatalytic efficiency toward rhodamine B (RhB) degradation with nine times that of pure BMO. The DRS and valence band of the X-ray photoelectron spectroscopy spectrum demonstrate that the band structure of 0.4CN/BMO/9Bi is a z-scheme structure. Quenching experiments also provided solid evidence that the ·O^2- (at -0.33 eV) is the main species during dye degradation, and the conduction band of g-C₃N₄ is only the reaction site, demonstrating that the transfer of photogenerated charge carriers of g-C₃N₄/Bi₂MoO₆/Bi is through an indirect z-scheme structure. Thus, the enhanced photocatalytic performance was mainly ascribed to the synergetic effect of heterojunction structures between g-C₃N₄ and Bi₂MoO₆ and the SPR effect of Bi doping, resulting in better optical absorption ability and a lower combination rate of photogenerated charge carriers. The findings in this work provide insight into the synergism of heterostructures and the SPR absorption ability in wastewater treatment.
- g-C₃N₄/Bi₂MoO₆/Bi,
- Z-scheme catalyst,
- Surface plasmonic resonance effect,
- Rhodamine B,
- Visible light,
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通讯作者: 陈斌, bchen63@163.com

Novel indirect Z-scheme g-C₃N₄/Bi₂MoO₆/Bi hollow microsphere heterojunctions with SPR-promoted visible absorption and highly enhanced photocatalytic performance