Advances in Rare Earth-Doped ZnO Photocatalysts: Enhancing Photogenerated Electron-Hole Pairs for Radical Atom Generation

Abstract

Abstract Zinc oxide (ZnO) is a promising material with a diverse range of applications, spanning gas sensing, photonics, photovoltaics, energy conversion, water splitting, photocatalysis, and transparent trapping. However, ZnO limited responsiveness to visible light affected to low photogenerated electron‐hole pairs (charge), low quantum efficiency, and high recombination of charge. In this review, we are addressing innovative strategies, including incorporation rare earth elements as a trap of electron to reduce recombination charge via ZnO doping from analysis 118 referenced sources. We found that hydrothermal shows very good methods for boosting efficiency up to 100 % within 60‐min. We found that for rare‐earth metals La and Ce as a doping show highest efficiency up to 100 % within 120 min irradiations, means that efficient as a trap for reducing recombination of charge. The potential of rare earth doped ZnO will enhance photogenerated electron‐hole pairs, catalyzing the generation of radical atoms via oxidation and reduction reactions. This review encapsulates the most current findings, it serves as a valuable resource for scholars seeking to advance their understanding of rare earth doped ZnO photocatalysts and developing innovative photocatalytic technologies.

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