Bimetallic Oxide Nanocomposites for Better Photocatalytic Activity: A Review

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ABSTRACT

Bi-metallic oxide photo-nanocatalysts are being explored extensively for removal of organic and inorganic pollutants like dyes and pesticides in an environmental benign and sustainable manner. The problems associated with the existing catalyst, are their high band gap values and large particle sizes. In this review, the photocatalytic degradation of pollutants from industrial waste water by using negligible amount of bi-metallic oxide photo-nanocatalysts has been covered as a solution of such types of problems. The photocatalytic activity of the nanocomposites was reported to be affected by main components that include the particle size, nature of crystallinity, band gap, morphology and surface area of the photocatalysts. Despite various required optimizations, the bi-metallic oxide nanocomposites like Cu/ZnO, Zn/CuO, Cu/NiO and Zn/NiO synthesized by using different methods have been shown to act as better photocatalysts as compared to others. This review article may open a new avenue to control the industrial waste water pollution in efficient and cost-effective way.

Significance of the study:

This study highlights the enhanced photocatalytic activity of bimetallic oxide nanocomposites like Cu/ZnO, Zn/CuO, Cu/NiO, and Zn/NiO. By addressing issues such as high band gap values and large particle sizes, these nanocomposites offer an effective and environmentally friendly solution for removing pollutants from industrial wastewater, promoting sustainable environmental practices.

Summary of the study:

This review explores the superior photocatalytic capabilities of bimetallic oxide nanocomposites for degrading pollutants in industrial wastewater. The study finds that factors such as particle size, crystallinity, and surface area significantly impact their efficiency. Bimetallic nanocomposites demonstrate better performance compared to monometallic counterparts, suggesting a promising, cost-effective approach to water purification.