Journal of Alloys and Compounds2022，Vol.89412.DOI:10.1016/j.jallcom.2021.162500

Fabrication of a stable light-activated and p/n type AgVO3/V2O5-TiO2 heterojunction for pollutants removal and photoelectrochemical water splitting

Zhang, Miao Lv, Jianguo Wang, Yanfen Yu, Hai Yang, Lei Liu, Yanmei Gao, Qian He, Gang Sun, Zhaoqi
Journal of Alloys and Compounds2022，Vol.89412.DOI:10.1016/j.jallcom.2021.162500
✕
  • NSTL
  • Elsevier

Fabrication of a stable light-activated and p/n type AgVO3/V2O5-TiO2 heterojunction for pollutants removal and photoelectrochemical water splitting

Zhang, Miao 1Lv, Jianguo 2Wang, Yanfen 3Yu, Hai 1Yang, Lei 4Liu, Yanmei 1Gao, Qian 1He, Gang 1Sun, Zhaoqi1
扫码查看

作者信息

  • 1. Anhui Univ
  • 2. Hefei Normal Univ
  • 3. Anhui Univ Sci & Technol
  • 4. Hefei Univ
  • 折叠

Abstract

In this study, we fabricated TiO2 nanorod arrays (TiO2), which were decorated with AgVO3 quantum dots (QDs) on and a layer of V2O5 film, forming a heterojunction material for removal pollutants and photo-electrochemical (PEC) water splitting. The AgVO3/V2O5-TiO2 nanorod arrays (AgVO3/V2O5-TiO2) synthesized by the secondary hydrothermal method were grown on conductive glass to form one-dimensional (1D) nanorod and p-n junction structures. Through experimental characterisation and testing, optical, mor-phological photocatalysis and PEC characteristics of the materials were measured and studied. The TiO2 modified with AgVO3 and V2O5 can significantly improve the visible light optical absorption, the reduce the electron-hole pair binding rate and shorten the band gap (3.07-1.41 eV) of TiO2. The resulting photocurrent density (116 uA/cm(2)) and photodegradation efficiency (rate constant, k = 0.025 min(-1)) of AgVO3/V2O5-TiO2 are approximately 20 (6 uA/cm(2)) and 5 times (0.005 min(-1)) higher than those of bare TiO2, respectively. The AgVO3/V2O5-TiO2 achieved a current density of 10 mA at an overpotential of 246.2 mV and exhibited ex-cellent oxygen evolution reaction (OER) performance. The systematic PEC experiments concluded that the optimized of the TiO2 interface by AgVO3 and V2O5 could promote the separation and transport of charge carriers. (C) 2021 Published by Elsevier B.V.

Key words

Double type-II band gap/Fermi level alignment/P-n junction heterojunction/Donor density/Photoelectrochemical activity/PHOTOCATALYTIC DEGRADATION/CONSTRUCTION/STABILITY/COMPOSITE/OXIDATION/ARRAYS

引用本文复制引用

出版年

2022
Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
被引量14
参考文献量37
段落导航相关论文