| Summary: | Discharging of coloured dyes into wastewater has become one of the crucial issues around the world. Among various established alternatives to treat dye-contaminated water, photocatalytic degradation is a promising method to remove various dyes from water and wastewater due to their excellent photocatalytic activity and minimal final by-products. Nowadays, an immense number of photocatalysts have been synthesized and modified to achieve efficient treatment of photocata-lytic degradation on dyes. On top of that, criteria include appropriate band gap energy of photo-catalysts, applicability for solar light irradiation, good stability, and maximum recyclability have become the main prioritized. Herein, this review summarised the progress of emerging photocat-alysts, graphene oxide, graphitic carbon nitride (g-C3 N4) and molybdenum disulfide (MoS2) in treating dyes. Furthermore, the performance of photocatalyst, the type of dyes treated, and significant findings from the treatment was also discussed. Finally, the future trends and challenges in applying photocatalysts to treat dyes in wastewater are comprehensively deliberated. © 2022 Desalination Publications. All rights reserved.
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