Z-Schematic Solar Water Splitting Using Fine Particles of H2-Evolving (CuGa)0.5ZnS2 Photocatalyst Prepared by a Flux Method with Chloride Salts

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

6 Scopus Citations
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Author(s)

  • Shunya Yoshino
  • Akihide Iwase
  • Yun Hau Ng
  • Rose Amal
  • Akihiko Kudo

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)5684-5692
Journal / PublicationACS Applied Energy Materials
Volume3
Issue number6
Online published26 May 2020
Publication statusPublished - 22 Jun 2020

Abstract

We successfully improved a (CuGa)0.5ZnS2 metal sulfide photocatalyst by preparation in a molten LiCl-CsCl flux for sacrificial H2 evolution compared to the counterpart prepared by a solid-state reaction. The particle size of the metal sulfide was controlled by changing the synthetic temperature of the flux method. The particle size of (CuGa)0.5ZnS2 as the H2-evolving photocatalyst drastically affected the Z-schematic water splitting activity driven by interparticle electron transfer with RGO-(CoOx/BiVO4) as an O2-evolving photocatalyst. When the (CuGa)0.5ZnS2 photocatalyst with a small particle size was used, the Z-schematic water splitting was enhanced by an increase in the collision frequency between Pt/(CuGa)0.5ZnS2 and RGO-(CoOx/BiVO4) particles for accelerating the interparticle electron transfer. This Z-scheme photocatalyst system gave an apparent quantum yield (AQY) of 0.80% at 440 nm and a solar-to-hydrogen conversion efficiency (STH) of 0.024% for water splitting into H2 and O2.

Research Area(s)

  • water splitting, energy conversion, Z-scheme system, metal sulfide, flux, REDUCED GRAPHENE OXIDE, STATE ELECTRON MEDIATOR, SOLID-SOLUTION, H-2 EVOLUTION, HYDROGEN EVOLUTION, SYSTEMS, CRYSTALS, POWDER, BIVO4

Citation Format(s)

Z-Schematic Solar Water Splitting Using Fine Particles of H2-Evolving (CuGa)0.5ZnS2 Photocatalyst Prepared by a Flux Method with Chloride Salts. / Yoshino, Shunya; Iwase, Akihide; Ng, Yun Hau; Amal, Rose; Kudo, Akihiko.

In: ACS Applied Energy Materials, Vol. 3, No. 6, 22.06.2020, p. 5684-5692.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review