Nanoparticles exhibits versatile chemical, optical, electrical and magnetic properties. Metal oxide nanoparticles i.e. copper oxide synthesized via chemical route have potential applications in the field of photocatalyis for environmental remediation; water purification, optoelectronics for solar energy conversion and bioremediation for antimicrobial potential. Size and shape of copper oxide nanoparticles at nanoscale level  can be controlled by synthesis parameters i.e. type and dose of precursor salt chemical, capping/stablizing agent adopted, ph value, temperature conditions and synthesis procedure. Synthesized spherical and rod shaped nanoparticles used for dye degradation study to remove methylene blue, congo red, methylene orange and eriochrome black T dyes. Temperature dependent voltage-current and photoluminescence study conducted for synthesized nanorods.This review elaborates the size and shape dependent study of copper oxide nanoparticles for purification of dye polluted water and electrical conductivity for optoelectronic applications.

Gurjinder Singh has completed his Ph.D. in the research area of synthesis, characterization and electronic properties of metal oxide semiconductor nanoparticles. He is serving as Associate Professor in the department of Electrical and Electronics & Communication Engineering at DIT University, Dehradun. His research work highlights chemical and green synthesis of metal oxide semiconductor nanoparticles for photoluminescence, photocatalytic, bioremedial and sensing applications. His current research work relates to the properties of metal oxide semiconductor nanoparticles i.e. dye degradation for environmental remediation. And electrical conductivity and light absorption for optoelectronic devices.