Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

Abstract

Functionalization of metal oxides nanomaterial by different organic and inorganic species could considerably enhance the electrochemical performance of a supercapacitor. Here, we have synthesized and functionalized ZnO nanoparticles (NPs) via organic compounds of E. cognate and then doped the synthesized nanomaterials by NiO following hydrothermal route involving the bioactive compounds. As synthesized ZnO@NiO was analyzed by field emission-scanning electron microscopy at nanoscale. The organic functional groups were delineated by X-ray photoelectron spectroscopy as well as by Fourier transform infrared spectroscopy. What is more, Tauc plot revealed drastically decreased band gap energy of ZnO@NiO to 2.48 eV resulting in an enhanced electrochemical properties. Therefore, organic framework derived ZnO@NiO nanomaterial was scrutinized as an electrode for supercapacitor by galvanostatic charge-discharge, cyclicvoltammetry and electrochemical impedance spectroscopy. ZnO@NiO electrode demonstrated specific capacitance of 185 Fg −1 by cyclicvoltammetry, proposing its potential towards supercapacitor due to nanoscale particles and incorporated C, O, and N atoms of organic compounds. K E Y W O R D Sbio-template, low band gap energy, nanostructures, stabilizing agents, supercapacitor, zinc oxides: nickel oxide

Green synthesis of doped Co3O4 nanocatalysts using organic template for fast azo dye degradation from aqueous environment

“…The Raman scattering vibration modes in Fig. 3(a) correspond to Co 3 O 4 phase in agreement with Kombaiah et al 23 . In Fig.…”

“…The Raman scattering vibration modes in Fig. 3(a) correspond to Co 3 O 4 phase in agreement with Kombaiah et al 23 In Fig. 3(c), various vibration bands can be observed over the range 300 to 1500 cm −1 corresponding to Co 3 O 4 and NiO.…”

“…Previously, we have successfully demonstrated the functionalization of metal oxide nanomaterials using Euphorbia cognata Boiss for energy storage applications. 22,23 The bioactive compounds of plants have been used as reducing and stabilizing agents in the synthesis of metal oxide-based photocatalysts in a number of studies. Singh et al synthesized CuO nanoparticles using P. guajava plant extract and revealed their 93% degradation efficiency for removal of industrial dyes.…”

“…pindrow ) leaves. Previously, we have successfully demonstrated the functionalization of metal oxide nanomaterials using Euphorbia cognata Boiss for energy storage applications 22,23 . The bioactive compounds of plants have been used as reducing and stabilizing agents in the synthesis of metal oxide‐based photocatalysts in a number of studies.…”

Facile ZnO-based nanomaterial and its fabrication as a supercapacitor electrode: synthesis, characterization and electrochemical studies

“…The current era of advancement in technology has greatly increased the demand of electrochemical advanced nanomaterials, such as supercapacitors, batteries, and fuel cells. [1][2][3][4][5][6] The performance of these devices critically depends on the ow of electrons or conductivity of the electrode material. 6,9,[15][16][17][18] Therefore, numerous electrode materials have been intensively investigated among the scientic community to enhance the performance of electrodes.…”