MoO3 based nanocomposites for the photocatalytic degradation of colourants – A review

Photocatalysis is the most environmentally friendly method for reducing and mineralizing organic contaminants because of its high efficacy, low toxicity, and low cost. Semiconductor photocatalysts are one of the most intriguing catalysts because they are safe and produce no secondary pollution, making them one of the best at removing pollutants from water. Transition metal oxide molybdenum trioxide (MoO3) is a widely used photocatalyst because of its tunnel structure and one-dimensional behaviour. Because it is common, has strong electrochemical activity, is non-toxic, and kills bacteria, MoO3 also plays a big role in semiconductor photocatalysts. MoO3 outperformed other oxide semiconductors as photocatalysts owing to its superior adsorption properties. MoO3 is commonly found in three polymorphs: orthorhombic, monoclinic, and hexagonal. In addition, the efficacy of various experimental settings on the deterioration of various colourants was investigated. As a result, the current study examines the photocatalytic activities of various MoO3-based nanocomposites as well as the results of various experimental conditions, with a particular emphasis on extensive colourants.