Industrial applications of photocatalytic methods such as textile pharmaceutical industries, tannery, and craft

Abstract The burning issue affecting people at large all over the world is water pollution which predominantly occurs due to the residual dyes coming from various types of industries such as textiles, pulp and paper, pharmaceutical, bleaching industries, and tanneries. A large amount of persistent organic pollutants is also introduced into the freshwater resources from the wastewater treatment plants. Since the accumulation of dyes and organic compounds cause toxicity to the existing aquatic organisms, a substantial technique is to be implemented for the removal of the unwanted pollutants. Varieties of techniques have been implemented for these purposes, but the most recent technique involves the implementation of photocatalysis involving various types of metallic-oxide photocatalysts with special reference to titanium dioxide (TiO2). The proposed chapter would comprise various types of metallic oxides and mechanisms involved therein. The chapter would also help in elaborating the mechanisms that can be implemented for increasing the photocatalytic properties of the metallic oxides for the degradation of the organic contaminants and efforts devoted to improving the effectiveness of photocatalytic methods.