ABSTRACT
Metal oxide nanoparticles (NPs) and their nanocomposites (NCs) are reviewed comprehensively for wastewater treatment. The controlled textural and morphological properties, variable surface chemistry, broad specific areas of the surface, crystalline nature, and excess availability of nanomaterials are the main factors responsible for adsorption and photocatalysis degradation behavior of nanostructured metal oxides (MOs) and their NCs. Oxides of iron, titanium, copper, zinc, tungsten, metal oxides, and graphene-based MO NCs with variable crystalline, morphological, and structural properties are studied, with an emphasis on recent challenges, improvements, and opportunities for adsorptive removal and photodegradation of organic contaminants such as dyes. This study also helps us to understand photocatalytic metal oxides and their NCs with photocatalytic action-related properties. Remarkable photocatalytic abilities, low-cost feasible approaches to processing and controlled band gap products render the use of metal oxides an extremely important photocatalytic approach for the degradation of organic pollutants. The thesis presents an excellent platform for researchers working on water treatment composites containing metal oxides and those working on MOs and NCs with adsorption photo-degrade, etc.
