A Comprehensive Review on Green Synthesis of ZnO Nano Particles and its Applications in Photocatalysis

Santosh Kumar  Nathsharma

doi:10.69968/ijisem.2025v4i2359-367

Authors

Santosh Kumar Nathsharma Lecturer in Chemistry, Stewart Science College, Cuttack, Odisha

DOI:

https://doi.org/10.69968/ijisem.2025v4i2359-367

Keywords:

Metal oxide, Water pollution, Photocatalytic process, Green synthesis, Advanced oxidation processes (AOPs), Zinc oxide nanoparticle (ZnO NPs)

Abstract

One of the biggest issues facing humanity globally is water pollution. The discharge of untreated wastewater from urbanisation and population growth poses a serious danger to natural water supplies. Metal oxide is one of the most often used photosensitive catalysts in the photocatalysis process, which breaks down pollutants. Instead of using metal oxide in its bulk form, nanosized metal oxide is being employed to boost the photocatalytic activity. This review highlights the significant potential of green-synthesized ZnO nanoparticles (ZnO NPs) in photocatalytic applications. Various plant-based methods, including the use of brinjal calyxes and rosin from Pinus latteri, have demonstrated eco-friendly, low-cost, and efficient routes for ZnO NP synthesis. Overall, green synthesis offers a sustainable alternative to conventional chemical methods, producing highly active and environmentally benign nano catalysts. This makes green-synthesized ZnO NPs as promising candidates for wastewater treatment and broader environmental remediation efforts.

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