Copyright (c) 2026 H.N. Rajesha, Vanishree Beloor, N.V. Sushma, Norah B. Altheeb, Mohammad R. Hatshan, Syed Farooq Adil, J.P. Shubha

This work is licensed under a Creative Commons Attribution 4.0 International License.
Green Fabrication of Ag-Functionalized WO3 Nanostructures: Advancing Visible-Light Photocatalysis and Biodiesel Production
Corresponding Author(s) : J.P. Shubha
Asian Journal of Chemistry,
Vol. 38 No. 10 (2026): Vol 38, Issue 10, 2026
Abstract
In this study, Asystasia gangetica leaf extract was employed as a green precursor for the synthesis of silver-functionalized tungsten trioxide nanoparticles (Ag-WO3 NPs) via the solution combustion method. The synthesized nanoparticles were characterized using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, UV-visible spectroscopy, and scanning electron microscopy (SEM) to investigate their crystalline structure, functional groups, optical properties and surface morphology, respectively. The visible-light driven photocatalytic performance of Ag-WO3 NPs was evaluated using crystal violet (CV) as a model dye and an effluent sample collected from a silk-dyeing unit. The results demonstrated 88% degradation of CV within 6 h at pH 9.2 and 85% degradation of the effluent within 8 h at pH 6.8 under visible-light irradiation. The synthesized Ag/WO₃ NPs were tested as transesterification catalysts for converting waste sunflower oil into methyl esters, extending their potential use beyond photocatalysis to wastewater treatment and biodiesel production.
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