Synthesis and characterization of quaternary GO/CoCrO3/SiO2/Ag2WO4Nanocomposite based on energy storage and photocatalytic applications

Abstract

This paper embellished to present novel graphene oxide/cobalt chromium oxide/silicon dioxide/silver tungstate nanocomposite using urea as a reducing agent and tetraethylorthosilicate to enhance stability via hydrothermal approach along with modified hummer’s method, co-precipitation and sol–gel routes. The existence of oxygen, cobalt, chromium, carbon, silicon, silver, and tungsten are confirmed by the nanocomposite elemental composition whereas reduction in particle size up to 4.28 nm indicated by surface morphology. Nanocomposite material had an average crystallite size of 6.85 nm with band gap of 2.5 eV possessing zeta potential value of −16.9 mV. Peak intensity has decreased indicated by Pl spectra whereas FTIR confirms existence of functional groups. The material exhibited excellent electrochemical performance with a specific capacitance of 5124F/g and electrochemical active surface area of 0.02 cm2. The power density ranges from 2881.8 to 2117 W/kg and the energy density ranges from 117.6 to 160.1 Wh/Kg whereas charge transfer resistance value of 1.67 Ω results in electron rate constant 4.98 × 10-9 cms−1. Nanomaterial shows photocatalytic activity about 88.27% degradation efficiency achieved for methylene blue dye under direct sunlight irradiation for 180 min obtaining pseudo kinetics constant value of 1.43x10-2 min−1. Overall results suggest that the GO/CoCrO3/SiO2/Ag2WO4 nanocomposite material has promising potential as energy storage material for supercapacitors and as a photocatalytic material for environmental remediation.