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author:

Wei, Dingqiong (Wei, Dingqiong.) [1] | Ding, Yao (Ding, Yao.) [2] | Li, Zhaohui (Li, Zhaohui.) [3] (Scholars:李朝晖)

Indexed by:

EI Scopus SCIE

Abstract:

To fabricate an efficient two-component Z-scheme system for visible light induced overall water splitting, CdS/WO3 nanocomposites, with cubic CdS nanoparticles grown on the surface of hexagonal WO3 nanorods, were prepared via a facile precipitation of Cd2+ with S2- in the presence of pre-obtained hexagonal WO3 nanorods. MnO2 and MoS2, the cocatalysts for O-2 and H-2 generation respectively, were selectively deposited on WO3 and CdS in the CdS/WO3 nanocomposites. The resultant MoS2-CdS/WO3-MnO2 composites show photocatalytic activity for overall water splitting under visible light, with an optimized performance observed over 2.0%MoS2-0.2 CdS/WO3-1.0%MnO2. The visible light induced overall water splitting over MoS2-CdS/WO3-MnO2 nanocomposites can be attributed to the presence of a Z-scheme charge transfer pathway in the CdS/WO3 nanocomposites, ie, the transfer of the photo-generated electrons from the CB of WO3 to the VB of CdS to recombine with the photo-generated holes through an efficient interface between cubic CdS and hexagonal WO3. The left photo-generated holes in VB of WO3 and the photo-generated electrons in CB of CdS therefore can accomplish the water oxidation and water reduction simultaneously, with the assistance of the surface deposited cocatalysts (MnO2 and MoS2). This work demonstrated the great potential of fabricating the two-component direct Z-scheme photocatalytic systems for overall water splitting from two semi-conductors with a staggered band structure. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Keyword:

CdS Direct Z-scheme Noble-metal-free Photocatalytic overall water splitting WO3

Community:

  • [ 1 ] [Wei, Dingqiong]Fuzhou Univ, Coll Chem, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Peoples R China
  • [ 2 ] [Ding, Yao]Fuzhou Univ, Coll Chem, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Peoples R China
  • [ 3 ] [Li, Zhaohui]Fuzhou Univ, Coll Chem, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Peoples R China

Reprint 's Address:

  • 李朝晖

    [Li, Zhaohui]Fuzhou Univ, Coll Chem, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Peoples R China

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Source :

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

ISSN: 0360-3199

Year: 2020

Issue: 35

Volume: 45

Page: 17320-17328

5 . 8 1 6

JCR@2020

8 . 1 0 0

JCR@2023

ESI Discipline: ENGINEERING;

ESI HC Threshold:132

JCR Journal Grade:2

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 30

SCOPUS Cited Count: 31

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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