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Indium sulfide-based photocatalysts for hydrogen production and water cleaning: a review

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Abstract

Solar illumination is a promising source of primary energy to reduce global warming and to clean polluted waters, thus fostering research of the design of efficient photocatalysts for hydrogen production by water splitting and for contaminant degradation. In particular, photocatalysis by indium sulfide (In2S3) is drawing attention due to its suitable narrow bandgap of 2.0–2.3 eV for visible light harnessing, yet large-scale application of unmodified In2S3 is limited. Here we review the photocatalyst criteria for water splitting, the synthesis and morphological manipulations of In2S3, the synthesis of heterojunctions by coupling semiconductors to increase performance, and doping In2S3. In2S3-based heterojunctions, i.e., traditional type II, all-solid-state, and direct Z-scheme photocatalytic systems show benefits such as larger charge separation, broad solar spectrum absorption, and amended conduction band and valence band edge potentials for maximum pollutant removal and H2 production. The effect of dopant incorporation on electronic modulations of In2S3 is explained by the density functional theory.

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Abbreviations

AAS:

All solid state

ATP:

Adenosine tri-phosphate

APAP:

Analgesic/antipyretic acetaminophen

CQDs:

Carbon quantum dots

CSP:

Chemical spray pyrolysis;

CVD:

Chemical vapor deposition

CB:

Conduction band

η :

Efficiency

ESR:

Electron spin resonance

EDX:

Energy-dispersive X-ray

EDTA:

Etheylenediamine tetra-acetic acid

ΔG:

Gibbs free energy

·OH:

Hydroxyl radical

HER:

Hydrogen evolution rate

NHE:

Normal hydrogen electrode

1D:

One-dimensional

OER:

Oxygen evolution rate

OPTP:

Optical pump-tetrahertz probe spectroscopy

PEC:

Photoelectrochemical

PL:

Photoluminescence

SEM:

Scanning electron microscope

ΔG°:

Standard Gibbs free energy

·O2 :

Superoxide radicals

3D:

Three-dimensional

TEM:

Transmission electron microscope

2D:

Two-dimensional

UV-radiations:

Ultra-violet radiations

UV-DRS:

UV–vis diffuse reflectance

VB:

Valence band

XRD:

X-ray diffraction

XRD:

X-ray diffraction

XPS:

X-ray photoelectron spectroscopy

0D:

Zero-dimensional

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Correspondence to Pankaj Raizada or Van-Huy Nguyen.

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Soni, V., Raizada, P., Kumar, A. et al. Indium sulfide-based photocatalysts for hydrogen production and water cleaning: a review. Environ Chem Lett 19, 1065–1095 (2021). https://doi.org/10.1007/s10311-020-01148-w

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  • DOI: https://doi.org/10.1007/s10311-020-01148-w

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