Recent progress of Cu2ZnSnS4 and Cu2ZnSnS4-based heterostructures for photocatalysis

Copper zinc tin sulfide, Cu2ZnSnS4 (CZTS), has recently emerged as a promising candidate for photocatalytic applications due to its earth abundance, non-toxicity, and suitable bandgap for visible light absorption. CZTS has been prepared using different methods for a range of applications. This synthesis and development of CZTS and CZTS-based heterostructures have been compiled and discussed. This review provides an overview of the recent progress in utilizing CZTS for photocatalysis and highlights its advantages as well as its challenges. Moreover, this review also covers the surface modifications of CZTS that have been employed to enhance its photocatalytic activity. However, unexplored areas remain in research that could aid in advancing the development of CZTS and CZTS-based heterostructures. Therefore, this perspective review aims to offer insights into the fabrication and optimization of CZTS for photocatalytic applications under irradiation of visible light and future prospects have been suggested for further improvement in this field.