Abstract
The recent development of green chemistry, when preparing nanoparticles using plants and their various parts has received a lot of attention in today's world. Metal and metal oxide nanoparticles have gained recognition for their recent advances in green synthesis. In this work, the green synthesis of a 2D g-C3N4 nanosheet decorated with SnO2 nanocomposite was prepared by Ananas comosus crown extract for electrochemical storage applications. The novel Ananas comosus crown extract acts as a reducing or capping agent for a green approach. The prepared g-C3N4/SnO2 nanocomposites were studied with structural, functional group, morphological, elemental composition, chemical state, and surface area analysis of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman, Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET). SnO2 and various concentrations of g-C3N4 (25, 50, 75 & 100 mg) nanocomposite were investigated for electrochemical performance. At a current density of 1 Ag−1, the green synthesized (SnO2/g-C3N4 (50 mg)) SCN-50 nanocomposite displays a high specific capacitance of 302.7 Fg−1, as well as the composite demonstrates excellent capacitance retention of 94 % after 10,000 loops. Moreover, the asymmetric supercapacitor device of SnO2/g-C3N4//Activated carbon performed good reversible and cyclic stability with high energy and power density. The green synthesis of SnO2/g-C3N4 nanocomposite has promising electrode materials for future energy storage devices.
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