Preparation and characterization of In and Cu co-doped ZnS photocatalysts for hydrogen production under visible light irradiation

Kimi, Melody; Yuliati, Leny; Shamsuddin, Mustaffa

doi:10.1016/j.jechem.2016.03.012

Cited by 33 publications

(11 citation statements)

References 41 publications

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“…The presence of Cu in a photocatalyst facilitates carrier separation and also increases light absorption. As reported in a study of In and Cu co-doped ZnS photocatalysts by Kimi et al [84], photocatalytic performance is strongly related to the amount of doped Cu. With the suitable amount of doped Cu (0.03), hydrogen evolution reaches a maximum that is 8 times higher than that of hydrogen produced by In(0.1)-ZnS photocatalyst.…”

Section: Noble Metal Loadingmentioning

confidence: 73%

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Lee

Chang

2019

Catalysts

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Metal sulfide-based photocatalysts have gained much attention due to their outstanding photocatalytic properties. This review paper discusses recent developments on metal sulfide-based nanomaterials for H2 production, acting as either photocatalysts or cocatalysts, especially in the last decade. Recent progress on key experimental parameters, in-situ characterization methods, and the performance of the metal sulfide photocatalysts are systematically discussed, including the forms of heterogeneous composite photocatalysts, immobilized photocatalysts, and magnetically separable photocatalysts. Some methods have been studied to solve the problem of rapid recombination of photoinduced carriers. The electronic density of photocatalysts can be investigated by in-situ C K-edge near edge X-ray absorption fine structure (NEXAFS) spectra to study the mechanism of the photocatalytic process. The effects of crystal properties, nanostructure, cocatalyst, sacrificial agent, electrically conductive materials, doping, calcination, crystal size, and pH on the performance of composite photocatalysts are presented. Moreover, the facet effect and light trapping (or light harvesting) effect, which can improve the photocatalytic activity, are also discussed.

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Section: Noble Metal Loadingmentioning

confidence: 73%

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Lee

Chang

2019

Catalysts

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“…The comparison of the photocatalytic H 2 production activities of the Ni@ZS/CuC photocatalyst with previously published data on ZnS-based photocatalysts is listed in Table S1. − ZnS-based photocatalysts were prepared by introducing dopants or forming composite photocatalysts. The Ni@ZS/CuC photocatalyst exhibits high H 2 production activity.…”

Section: Resultsmentioning

confidence: 99%

Metal Complex/ZnS-Modified Ni Foam as Magnetically Stirrable Photocatalysts: Roles of Redox Mediators and Carrier Dynamics Monitored by Operando Synchrotron X-ray Spectroscopy

Chang

Chao

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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Magnetically stirrable photocatalysts binding the ZnS-decorated Ni foam with the metal complex cocatalyst as a redox mediator and light-absorbing composition were investigated. Loading metal complex can improve light absorption, surface hydrophilicity, interfacial charge migration, and H2 production activity. The variation of the metal valences of the composite photocatalysts in an operando environment (with sacrificial agent solution) with and without light irradiation was investigated by X-ray absorption near-edge structure (XANES) spectra and Fourier-transformed extended X-ray absorption fine structure (EXAFS) spectra to monitor the charge carrier dynamics of photocatalysis and explain how the macrocyclic Cu complex (CuC) acted as a redox mediator better than the Ni complex. The smaller valence difference of copper valence in ZS/CuC for dark and light states revealed that the Cu complex facilitates a reversible electron transfer between the ZnS photocatalyst and H+. Loading the Cu complex can improve the separation of photogenerated carriers by the redox couple of complexes, leading to a significantly improved photocatalytic H2 production activity of 8150 μmol h–1 g–1. The reactants can flow through these magnetically stirrable Ni foam-based photocatalysts by magnetic-field-driven stirring, which improves the contact between photocatalysts and the sacrificial agents. The operando synchrotron provides new insights for understanding the roles of redox mediators.

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“…Zinc sulphide (ZnS) is another most important photocatalyst in sulphide‐based semiconductor groups. ZnS and CdS belong to the sulphide IIB group 150 . It is a usual visible light‐reactive photocatalyst with tremendous properties and a bandgap energy of 3.6 eV.…”

Section: Sulphide‐based Photocatalystsmentioning

confidence: 99%

“…ZnS and CdS belong to the sulphide IIB group. 150 It is a usual visible light-reactive photocatalyst with tremendous properties and a bandgap energy of 3.6 eV. ZnS basically has two types of structures: hexagonal closed pack structure and face-centred cubic.…”

Section: Zinc Sulphide Photocatalystsmentioning

confidence: 99%

Photocorrosion inhibition of sulphide‐based nanomaterials for energy production through photocatalytic water splitting

Yaseen

Tahir

Wattoo

2021

Intl J of Energy Research

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Summary To overcome the energy shortage and environmental pollution, sunlight is considered an ideal source to solve these problems. Photocatalyst water splitting for H2 production by using solar energy is a favourable technology to deal with the energy shortage, global warming and environmental pollution. During the last few years, sulphide‐based nanomaterial photocatalysts have attained considerable attention due to their comparatively narrow bandgap energy, show excitation in the visible region, at a wavelength of about 600 nm, and thus demonstrate high photocatalytic activities. But semiconductor photocatalysts are easy to be photocorroded due to sensitivity in visible light. The photocorrosion hinder their photocatalytic performance. In order to overcome photocorrosion effects, some modifications in the photocatalysts' surface are required, for example adjusting the metal sulphide structure, depositing anti‐photocorrosion layers or nanoparticles on the surface of semiconductors, which inhibit the photocorrosion attack and sustain the stability. In this review, we discuss progress in the structure, preparation methods, H2 evolution rate, photocorrosion inhibition and energy and environmental applications of different sulphide‐based nanomaterial photocatalysts.

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Preparation and characterization of In and Cu co-doped ZnS photocatalysts for hydrogen production under visible light irradiation

Cited by 33 publications

References 41 publications

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Metal Complex/ZnS-Modified Ni Foam as Magnetically Stirrable Photocatalysts: Roles of Redox Mediators and Carrier Dynamics Monitored by Operando Synchrotron X-ray Spectroscopy

Photocorrosion inhibition of sulphide‐based nanomaterials for energy production through photocatalytic water splitting

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