Naveen Thakur, Pankaj Kumar, Nikesh Thakur, Kuldeep Kumar, Ashwani Tapwal, Pankaj Sharma
Metal and metal oxide nanoparticles are used widely in a variety of fields of science, research organizations, and industry sectors due to recent advancements in nanoscience and nanotechnologies. Due to their exclusive its unique characteristics and uses, copper oxide nanoparticles (CuO NPs) have drawn more attention than further other metal oxides. The expensive components reagents, equipment, and environmental hazards and risks connected to the physical and chemical processes of CuO NPs synthesis have been a major cause for concern. This review main features of a collection of thorough data from the latest advancements in the synthesis, characterization, and applications from prior research studies on the biological method of synthesizing CuO NPs in the sample order to puffer a solution to the given aforementioned techniques by aiming to reduce reducing environmental pollution and producing inexpensive cheaper nanoparticles with effective characteristics. CuO NPs demonstrated astounding photocatalytic efficiency against the degradation of industrial waste dye. For the photocatalytic destruction of organic contaminants, CuO NPs have high prospective applications. This review study provides additional information on the use of CuO photocatalysts, which are low-cost and environmentally acceptable, to efficiently remove hazardous colors from industrial wastewater. This investigation also provides useful and informative knowledge on the instant synthesis of CuO NPs from plant extracts with desired properties.
Prof. Saurav Goel, Mechanical Engineering Division, School of Engineering, London South Bank University, UK. 
