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A comprehensive review of synthetic methodologies, photo/photoelectro-catalytic hydrogen evolution performance and pollutant degradation capabilities of CuGaS2 based materials

Year: 2025

Type: article

Abstract: Copper gallium sulfide (CuGaS 2 ) is an important candidate of the group I-III-VI 2 semiconductor family. CuGaS 2 has a direct band gap of ∼2.49 eV, which falls in the visible range. The advantages of CuGaS 2 also include environmentally friendly elemental components, tunable band gap alignment and excellent light harvesting property. These properties make CuGaS 2 an emerging candidate for visible light induced photocatalysis, photoelectrocatalysis and photovoltaic applications. In addition, the properties of CuGaS 2 can vary depending on the polymorphic phase, which includes chalcopyrite, wurtzite and zinc blende. The synthesis methods play a crucial role in the phase stabilization and properties of CuGaS 2 . This review summarizes the different synthesis methods adopted for the preparation of CuGaS 2 and their unique experimental factors that play an important role in the desired phase, morphology and application. The prescriptive role of solvent, temperature, surfactant, etc., is discussed. Despite the diverse applications of CuGaS 2 , this review mainly focuses its effectiveness in terms of photocatalytic and photoelectrocatalytic potency in H 2 generation and pollutant degradation. A detailed discussion on the mechanistic pathways for the photocatalytic and photoelectrocatalytic properties and the enhancement of the properties by doping and heterostructure assembly is emphasized. Some other applications of CuGaS 2 are also concisely discussed. In addition, the challenges and future prospects for improving the properties of CuGaS 2 in photo/photoelectro-catalytic applications are emphasized in this review.

Source: International Journal of Hydrogen Energy

DOI: 10.1016/j.ijhydene.2025.151588

Authors: N Vyshakh Viswanath, Jagan Radhakrishnan, Krishnendu Biswas

Institutions: Vellore Institute of Technology University, Vels University

Language: English

Topic: Advanced Photocatalysis Techniques

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,730