Microwave synthesis of ZnIn2S4/WS2 composites for photocatalytic hydrogen production and hexavalent chromium reduction

Watcharapong Pudkon; Sulawan Kaowphong; Samuel Pattisson; Peter J. Miedziak; Hasliza Bahruji; Thomas E. Davies; David J. Morgan; Graham J. Hutchings

doi:10.1039/c9cy01553a

Microwave synthesis of ZnIn₂S₄/WS₂ composites for photocatalytic hydrogen production and hexavalent chromium reduction

Watcharapong Pudkon, Sulawan Kaowphong, Samuel Pattisson, Peter J. Miedziak, Hasliza Bahruji, Thomas E. Davies, David J. Morgan, Graham J. Hutchings^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

A rapid microwave synthesis route for the fabrication of ZnIn₂S₄ powder and ZnIn₂S₄/WS₂ composites is presented. Firstly, the effects of different sulfur sources-thioacetamide and l-cysteine-on the physicochemical properties and photocatalytic H₂ production of the synthesized ZnIn₂S₄ were investigated. It was found that well-defined flower-like ZnIn₂S₄ microspheres obtained from l-cysteine facilitated a relatively higher H₂ production rate. Then, different loadings of WS₂ were introduced into the well-defined flower-like ZnIn₂S₄ microspheres aiming to improve its photocatalytic H₂ production. Compared to pure ZnIn₂S₄ and WS₂, all ZnIn₂S₄/WS₂ composite photocatalysts exhibited enhanced photocatalytic H₂ production in the presence of Na₂S/Na₂SO₃ as sacrificial reagents under UV-visible irradiation, where the ZnIn₂S₄/WS₂-40% wt composite had the highest photocatalytic activity. For this material, 293.3 and 76.6 μmol h^-1 g^-1 of H₂ gas were produced under UV-visible and visible light irradiation, respectively. In addition, the photoreduction activity of hexavalent chromium (Cr(vi)) by ZnIn₂S₄/WS₂-40% wt was also investigated under visible light irradiation and it was observed that 98.5% of Cr(vi) was reduced within 90 min at pH 4.

Original language	English
Pages (from-to)	5698-5711
Number of pages	14
Journal	Catalysis Science and Technology
Volume	9
Issue number	20
DOIs	https://doi.org/10.1039/c9cy01553a
Publication status	Published - 4 Sept 2019

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/c9cy01553aLicence: Unspecified

Cite this

@article{a9851fbc7bbb4292b6f7915da845efcf,

title = "Microwave synthesis of ZnIn2S4/WS2 composites for photocatalytic hydrogen production and hexavalent chromium reduction",

abstract = "A rapid microwave synthesis route for the fabrication of ZnIn2S4 powder and ZnIn2S4/WS2 composites is presented. Firstly, the effects of different sulfur sources-thioacetamide and l-cysteine-on the physicochemical properties and photocatalytic H2 production of the synthesized ZnIn2S4 were investigated. It was found that well-defined flower-like ZnIn2S4 microspheres obtained from l-cysteine facilitated a relatively higher H2 production rate. Then, different loadings of WS2 were introduced into the well-defined flower-like ZnIn2S4 microspheres aiming to improve its photocatalytic H2 production. Compared to pure ZnIn2S4 and WS2, all ZnIn2S4/WS2 composite photocatalysts exhibited enhanced photocatalytic H2 production in the presence of Na2S/Na2SO3 as sacrificial reagents under UV-visible irradiation, where the ZnIn2S4/WS2-40% wt composite had the highest photocatalytic activity. For this material, 293.3 and 76.6 μmol h-1 g-1 of H2 gas were produced under UV-visible and visible light irradiation, respectively. In addition, the photoreduction activity of hexavalent chromium (Cr(vi)) by ZnIn2S4/WS2-40% wt was also investigated under visible light irradiation and it was observed that 98.5% of Cr(vi) was reduced within 90 min at pH 4.",

author = "Watcharapong Pudkon and Sulawan Kaowphong and Samuel Pattisson and Miedziak, {Peter J.} and Hasliza Bahruji and Davies, {Thomas E.} and Morgan, {David J.} and Hutchings, {Graham J.}",

note = "OA compliant version deposited with Cardiff ORCA - http://orca.cf.ac.uk/125826/",

year = "2019",

month = sep,

day = "4",

doi = "10.1039/c9cy01553a",

language = "English",

volume = "9",

pages = "5698--5711",

journal = "Catalysis Science and Technology",

issn = "2044-4753",

publisher = "Royal Society of Chemistry",

number = "20",

}

TY - JOUR

T1 - Microwave synthesis of ZnIn2S4/WS2 composites for photocatalytic hydrogen production and hexavalent chromium reduction

AU - Pudkon, Watcharapong

AU - Kaowphong, Sulawan

AU - Pattisson, Samuel

AU - Miedziak, Peter J.

AU - Bahruji, Hasliza

AU - Davies, Thomas E.

AU - Morgan, David J.

AU - Hutchings, Graham J.

N1 - OA compliant version deposited with Cardiff ORCA - http://orca.cf.ac.uk/125826/

PY - 2019/9/4

Y1 - 2019/9/4

N2 - A rapid microwave synthesis route for the fabrication of ZnIn2S4 powder and ZnIn2S4/WS2 composites is presented. Firstly, the effects of different sulfur sources-thioacetamide and l-cysteine-on the physicochemical properties and photocatalytic H2 production of the synthesized ZnIn2S4 were investigated. It was found that well-defined flower-like ZnIn2S4 microspheres obtained from l-cysteine facilitated a relatively higher H2 production rate. Then, different loadings of WS2 were introduced into the well-defined flower-like ZnIn2S4 microspheres aiming to improve its photocatalytic H2 production. Compared to pure ZnIn2S4 and WS2, all ZnIn2S4/WS2 composite photocatalysts exhibited enhanced photocatalytic H2 production in the presence of Na2S/Na2SO3 as sacrificial reagents under UV-visible irradiation, where the ZnIn2S4/WS2-40% wt composite had the highest photocatalytic activity. For this material, 293.3 and 76.6 μmol h-1 g-1 of H2 gas were produced under UV-visible and visible light irradiation, respectively. In addition, the photoreduction activity of hexavalent chromium (Cr(vi)) by ZnIn2S4/WS2-40% wt was also investigated under visible light irradiation and it was observed that 98.5% of Cr(vi) was reduced within 90 min at pH 4.

AB - A rapid microwave synthesis route for the fabrication of ZnIn2S4 powder and ZnIn2S4/WS2 composites is presented. Firstly, the effects of different sulfur sources-thioacetamide and l-cysteine-on the physicochemical properties and photocatalytic H2 production of the synthesized ZnIn2S4 were investigated. It was found that well-defined flower-like ZnIn2S4 microspheres obtained from l-cysteine facilitated a relatively higher H2 production rate. Then, different loadings of WS2 were introduced into the well-defined flower-like ZnIn2S4 microspheres aiming to improve its photocatalytic H2 production. Compared to pure ZnIn2S4 and WS2, all ZnIn2S4/WS2 composite photocatalysts exhibited enhanced photocatalytic H2 production in the presence of Na2S/Na2SO3 as sacrificial reagents under UV-visible irradiation, where the ZnIn2S4/WS2-40% wt composite had the highest photocatalytic activity. For this material, 293.3 and 76.6 μmol h-1 g-1 of H2 gas were produced under UV-visible and visible light irradiation, respectively. In addition, the photoreduction activity of hexavalent chromium (Cr(vi)) by ZnIn2S4/WS2-40% wt was also investigated under visible light irradiation and it was observed that 98.5% of Cr(vi) was reduced within 90 min at pH 4.

U2 - 10.1039/c9cy01553a

DO - 10.1039/c9cy01553a

M3 - Article

AN - SCOPUS:85073599514

SN - 2044-4753

VL - 9

SP - 5698

EP - 5711

JO - Catalysis Science and Technology

JF - Catalysis Science and Technology

IS - 20

ER -