Studies on photocatalytic performance and supercapacitor applications of undoped and Cu-doped ZnO nanoparticles

• DOI: 10.1016/j.apsadv.2022.100344
• Publication Date: 2022-11-24T13:56:52Z
• Authors: S. Sivakumar; Yengkokpam Robinson; Nazir Ahmad Mala
• Keywords: Wurtzite crystal structure; Coprecipitation

The structural, morphology and optical properties were characterised using XRD, FTIR, SEM, TEM, UV-DRS for the undoped Cu-doped ZnO NPs with varying Cu doping molar concentrations from 0 wt% to 6 through co-precipitation method. presence of a hexagonal wurtzite structure all samples was confirmed by structural study NPs, indicating incorporation Cu2+ ions into lattice substitution average crystallite sizes 25–22 nm. surface analysis indicated growth spherical nanocrystallites fine particles. Optical studies nanostructured particles revealed that increasing agent resulted in blue shift absorption band gap energy 3.27 eV 3.44 eV. degradation efficiency MB is 89.2% photocatalyst, which performs much better than under natural sunlight irradiation. electrochemical determined specific capacitance 10 100 mV/s scan rate samples. Amongst various concentrations, had most excellent 539.87 F/g at mV/s. Compared matrix enhanced photocatalytic activities performance wastewater treatment supercapacitor applications.