Abstract
Water pollution poses a significant global challenge that necessitates implementing effective remediation strategies. Redox reactions have garnered substantial attention in water treatment due to their capacity to disintegrate pollutants and eliminate contaminants. However, different catalysts may yield varying levels of efficiency, necessitate diverse energy sources, and entail different treatment durations for distinct types of pollutants. This review delves into the applications of metal oxide nanoparticles and hybrid materials in redox processes for water purification. Iron oxide nanoparticles, encompassing Fe and iron oxide nanoparticles (FeONPs), have showcased remarkable efficacy in removing diverse dyes through photocatalysis and sonocatalysis. Cerium oxide (CeO2) and its composites have exhibited promising results in photocatalysis, sonocatalysis, and electrocatalysis, which can degrade the organic pollutants in water. Furthermore, hybrid materials like graphene-based nanocomposites have remarkably effectively eliminated color and heavy metals from contaminated water through redox reactions. The amalgamation of organic and inorganic materials in these hybrids augments their photocatalytic and antibacterial properties. Overall, the utilization of redox reactions and hybrid materials offers a promising approach to tackling water pollution and ensuring the availability of clean water.
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