Photocatalytic efficiency of green synthesized ZnO nanoparticles for the degradation of methyl orange dye: A review

Abstract

The primary global source of water pollution is industrial and textile dyes. These industries produce Highly stable organic dyes that are released untreated into nearby ponds, lakes and rivers. As ZnO nanoparticles (NPs) are inexpensive, non-toxic, chemically and thermally stable, and have a higher UV absorption capacity, they are an effective nano-catalyst for removing hazardous contaminants such as organic and inorganic dyes from wastewater. The green synthesis of synthesised ZnO NPs, their shape and size, and their photocatalytic effectiveness against the dye methyl orange are all described in this paper. The emphasis is on environmentally friendly synthesis of ZnO NPs using plant extracts because the synthesis process impacts the characteristics and applications of ZnO NPs. Additionally, based on recently published literature, the shape and size factors that affect the photocatalytic activity in the degradation of MO dye are highlighted.