Title : Visible-Light-Driven degradation of highly concentrated methyl orange using a BiOI-MoS?-Polyaniline hybrid photocatalyst via green route
Abstract:
The present study focuses on the green synthesis of bismuth oxyiodide (BiOI) using Curcuma longa (haldi) extract and its subsequent compositing with polyaniline (PANI) to develop an efficient photocatalyst for environmental remediation. The phytochemical constituents in turmeric acted as both reducing and stabilizing agents, enabling an eco-friendly and cost-effective synthesis route. The prepared BiOI–PANI nanocomposite was characterized through XRD, FTIR, and SEM analyses to determine its structural, optical, and morphological properties. The results revealed enhanced charge separation efficiency and improved visible-light absorption in the composite compared to pure BiOI. Photocatalytic activity was evaluated by the degradation of organic pollutants under visible-light irradiation, where the BiOI–PANI catalyst exhibited a significantly higher degradation rate and stability. The synergistic interaction between BiOI and conductive PANI facilitated efficient electron–hole pair transfer, minimizing recombination losses. This green-synthesized BiOI–PANI catalyst demonstrates a sustainable pathway for the development of high-performance photocatalysts applicable in wastewater treatment and environmental purification.
Keywords: BiOI, polyaniline, turmeric extract, green synthesis, photocatalysis, environmental remediation.
