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Engineering the Dimensional Interface of BiVO 4-2D Reduced Graphene Oxide (RGO) Nanocomposite for Enhanced Visible Light Photocatalytic Performance

Authors
  • Sun, Jing1
  • Wang, Chunxiao1
  • Shen, Tingting1
  • Song, Hongchen1
  • Li, Danqi1
  • Zhao, Rusong
  • Wang, Xikui2
  • 1 (D.L.)
  • 2 College of Environmental Science and Engineering, Shandong Agriculture and Engineering University, Ji’nan 251100, China
Type
Published Article
Journal
Nanomaterials
Publisher
MDPI AG
Publication Date
Jun 10, 2019
Volume
9
Issue
6
Identifiers
DOI: 10.3390/nano9060907
PMID: 31234460
PMCID: PMC6630799
Source
PubMed Central
Keywords
License
Green

Abstract

Graphene as a two-dimensional (2D) nanoplatform is beneficial for assembling a 2D heterojunction photocatalytic system to promote electron transfer in semiconductor composites. Here a BiVO4 nanosheets/reduced graphene oxide (RGO) based 2D-2D heterojunction photocatalytic system as well as 0D-2D BiVO4 nanoparticles/RGO and 1D-2D BiVO4 nanotubes/RGO nanocomposites are fabricated by a feasible solvothermal process. During the synthesis; the growth of BiVO4 and the intimate interfacial contact between BiVO4 and RGO occur simultaneously. Compared to 0D-2D and 1D-2D heterojunctions, the resulting 2D-2D BiVO4 nanosheets/RGO composites yield superior chemical coupling; leading to exhibit higher photocatalytic activity toward the degradation of acetaminophen under visible light irradiation. Photoluminescence (PL) and photocurrent experiments revealed that the apparent electron transfer rate in 2D-2D BiVO4 nanosheets/RGO composites is faster than that in 0D-2D BiVO4 nanoparticles/RGO composites. The experimental findings presented here clearly demonstrate that the 2D-2D heterojunction interface can highlight the optoelectronic coupling between nanomaterials and promote the electron–hole separation. This study will motivate new developments in dimensionality factors on designing the heterojunction photocatalysts and promote their photodegradation photocatalytic application in environmental issues.

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