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

Autor: Yan Xing, Xichuan Lu, Yi Li, Bozhi Yang, Yujia Huang, Mengfei Zhang, Jing Cheng, Xin Min, Wei Pan
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Journal of Advanced Ceramics, Vol 11, Iss 11, Pp 1789-1800 (2022)
Druh dokumentu: article
ISSN: 2226-4108
2227-8508
DOI: 10.1007/s40145-022-0648-5
Popis: 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 $$(\rm{VO}_3^-)$$ ( V O 3 − ) 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.
Databáze: Directory of Open Access Journals
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