Two-dimensional (2D) MXenes are a hotspot for environmental photocatalysis attributable to their extreme conductivity and tunable hydrophilicity. MXenes, as a prospective photocatalytic contender, provide quick photogenerated charge carrier isolation, resulting in abundant availability for surface functional groups in light-harvesting promising materials, as well as laying the groundwork for better photoconversion competency. This review presents a detailed discussion of recent research on MXene photocatalyst production methods and photocatalytic performance for pollutant degradation and water splitting with the addition of CO2 reduction. More importantly, when mixed with other traditional photocatalysts such as metal oxide, metal sulfide, g-C3N4, and so on shows tremendous performance, MXenes are widely used as co-catalysts to increase the efficacy of photocatalytic activities. Furthermore, the stability of …