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Journal of Advanced Ceramics 2022, 11(11): 1789-1800 https://doi.org/10.1007/s40145-022-0648-5
Research Article | Open Access | Issue | Published: 05 November 2022

Self-assembled Ag4V2O7/Ag3VO4 Z-scheme heterojunction by pH adjustment with efficient photocatalytic performance

Show Author's Information Yan XINGa,b,  Xichuan LUb,  Yi LIc,  Bozhi YANGd,  Yujia HUANGe,  Mengfei ZHANGb,  Jing CHENGb,  Xin MINd,  Wei PANb( )
New Energy Technology Engineering Lab of Jiangsu Province, College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China
School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China
Keywords:
self-assembly, photocatalysis, heterojunction, Ag4V2O7/Ag3VO4, Z scheme
Cite this article:
XING Y, LU X, LI Y, et al. Self-assembled Ag4V2O7/Ag3VO4 Z-scheme heterojunction by pH adjustment with efficient photocatalytic performance. Journal of Advanced Ceramics, 2022, 11(11): 1789-1800. https://doi.org/10.1007/s40145-022-0648-5
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Abstract Full text Electronic supplementary material About this article

Semiconductor heterojunction plays a pivotal role in photocatalysis. However, the construction of a heterojunction with a fine microstructure usually requires complex synthetic procedures. Herein, a pH-adjusted one-step method was employed to controllably synthesize Ag4V2O7/Ag3VO4 heterojunction with a well-tuned 0D/1D hierarchical structure for the first time. It is noteworthy that the ordered stacking of vanadium oxide tetrahedron ( VO3−) guided by the pH value wisely realizes the in-situ growth of Ag4V2O7 nanoparticles on the surface of Ag3VO4 nanorods. Furthermore, comprehensive characterization and calculation decipher the electronic structures of Ag4V2O7 and Ag3VO4 and the formation of Z-scheme heterojunction, benefiting the visible light harvesting and carrier utilization. Such a new Ag4V2O7/Ag3VO4 heterojunction exhibits remarkable photocatalytic activity and excellent stability. Complete degradation of Rhodamine B (RhB) can be achieved in 10 min by the Ag4V2O7/ Ag3VO4 heterojunction under visible light irradiation, demonstrating an outstanding reaction rate of 0.35 min−1 that is up to 84-fold higher than those of other silver vanadates. More importantly, this integration of synthesis technology and heterojunction design, based on the intrinsic crystal and electronic structures, could be inspiring for developing novel heterostructured materials with advanced performance.


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About this article

Self-assembled Ag4V2O7/Ag3VO4 Z-scheme heterojunction by pH adjustment with efficient photocatalytic performance

Show Author's information Yan XINGa,b, Xichuan LUb, Yi LIc, Bozhi YANGd, Yujia HUANGe, Mengfei ZHANGb, Jing CHENGb, Xin MINd, Wei PANb( )
New Energy Technology Engineering Lab of Jiangsu Province, College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China
School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China

Abstract

Semiconductor heterojunction plays a pivotal role in photocatalysis. However, the construction of a heterojunction with a fine microstructure usually requires complex synthetic procedures. Herein, a pH-adjusted one-step method was employed to controllably synthesize Ag4V2O7/Ag3VO4 heterojunction with a well-tuned 0D/1D hierarchical structure for the first time. It is noteworthy that the ordered stacking of vanadium oxide tetrahedron ( VO3−) guided by the pH value wisely realizes the in-situ growth of Ag4V2O7 nanoparticles on the surface of Ag3VO4 nanorods. Furthermore, comprehensive characterization and calculation decipher the electronic structures of Ag4V2O7 and Ag3VO4 and the formation of Z-scheme heterojunction, benefiting the visible light harvesting and carrier utilization. Such a new Ag4V2O7/Ag3VO4 heterojunction exhibits remarkable photocatalytic activity and excellent stability. Complete degradation of Rhodamine B (RhB) can be achieved in 10 min by the Ag4V2O7/ Ag3VO4 heterojunction under visible light irradiation, demonstrating an outstanding reaction rate of 0.35 min−1 that is up to 84-fold higher than those of other silver vanadates. More importantly, this integration of synthesis technology and heterojunction design, based on the intrinsic crystal and electronic structures, could be inspiring for developing novel heterostructured materials with advanced performance.

Keywords: self-assembly, photocatalysis, heterojunction, Ag4V2O7/Ag3VO4, Z scheme

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Publication history

Received: 30 May 2022
Revised: 27 July 2022
Accepted: 17 August 2022
Published: 05 November 2022
Issue date: November 2022

Copyright

© The Author(s) 2022.

Acknowledgements

The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (Nos. 52102068, 52202058, and 52073156), Science and Technology on Advanced Functional Composite Laboratory (No. 6142906200509), State Key Laboratory of New Ceramics & Fine Processing Tsinghua University (No. KF202112), and the Natural Science Foundation of Jiangsu Province (No. 20KJB430017) and NUPTSF (No. NY219162).

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