Titanium Dioxide/Graphene-Based Nanocomposites as Photocatalyst for Environmental Applications: A Review

Nanostructured-based photocatalysts have always exhibited the potential to solve various environmental issues resulting from global urbanization and industrialization. The creation of nanostructured materials has given humans access to various techniques for treating the numerous inorganic and organic contaminants found in wastewater from multiple sources. Due to their exceptional photocatalytic activity, semiconductor materials, among various other materials have different environmental uses. Studying nanocomposites of titanium dioxide (TiO2) and carbon-based material, particularly graphene-based material, is one of the burgeoning research areas of visible-light-driven photocatalysts. It has been demonstrated that the combination of graphene-based material with titanium dioxide is more successful than titanium dioxide alone in photocatalysis. TiO2/graphene-based nanocomposites stand out due to their superior physical and chemical characteristics, such as their moderate band gap, high specific surface area, nontoxic, low cost, high corrosion resistance, high photoactivity, stability, and ease of handling in various configurations. Designing high-performance TiO2/graphene-based photocatalysts has drawn more and more attention. This study has evaluated TiO2/graphene-based nanocomposites for photocatalytic environmental applications from 2022 to 2024. These nanocomposites' diverse preparation methods have been discussed. The recent discoveries in TiO2/graphene-based nanocomposite composites and their uses in photocatalysis, such as wastewater treatment to remove contaminants and photoconversion of CO2 into renewable fuels are also briefly discussed in this review.