Metal-Decorated CeO2 nanomaterials for photocatalytic degradation of organic pollutants

Abstract

Metal-doped CeO 2 nanomaterials are widely used for the photocatalytic degradation of various organic pollutants, such as organic dyes, phenols, amines, and aromatic nitro compounds, from water. Appropriate oxygen vacancies, surface-active cationic sites, and energy bandgap deviation between doped metals and CeO 2 provide a suitable environment for enhancing photocatalytic activities to degrade organic pollutants. • Metal doped CeO 2 nanomaterials are studied and discussed. • Photocatalytic degradation capacities, characteristic bandgap, oxygen vacancies, and surface-active cationic sites, have been studied. • The synthesis routes and conditions, reaction temperature, concentration, nature and annealing temperature of the doping ions, and surface morphology are described. • The future prospective of Metal doped CeO 2 nanomaterials is presented. The increasing concentration of organic pollutants in water has become challenging and has lethal effects on humans and ecology. Metal-based materials have been used as promising candidates for the degradation of organic pollutants. This review summarizes and studies the recent applications of metal-doped CeO 2 -based nanomaterials for photocatalytic degradation of organic waste in the water. The unique properties of metal-doped CeO 2 , such as its characteristic bandgap, oxygen vacancies, and surface-active cationic sites, have been studied for organic waste degradation. In addition, the properties of the synthesis routes and conditions, reaction temperature, concentration, nature and annealing temperature of the doping ions, and surface morphology are described. Finally, challenges and prospects for the development of doped CeO 2 as a photocatalyst with precise morphology and synthesis routes are discussed.