Novel Polymeric-Modified PPY@GCN Based Composite for Photocatalytic Degradation of Reactive Green 5

The widely used dye Reactive Green 5 (RG 5) endures an adverse effect on human health and water supplies, necessitating effective elimination strategies. Heterogeneous photocatalysis based on semiconductors is a sustainable approach that precisely degrades organic contaminants. The present study aims to explain and verify the effectiveness of a remarkable PPY@GCN/Bi2WO6 (PGB) composite for the environmental remediation of RG 5 dye. The graphite carbon nitride (GCN) based ternary composite (PGB) has been synthesized by the hydrothermal approach. The prepared composites were studied by using SEM/EDX to indicate morphological characteristics and elemental variations, XRD for crystalline arrangement, FTIR for functional groups, UV-VIS for absorption spectral data and PL for emission spectra. The characterization study assists the effective assembly of PGB composite on the surface of good crystallinity GCN nanosheets. The designed heterojunction enhances photocatalytic performance and increases the separation of photo-generated charges. Light activity on prepared composites and influencing parameters (pH, oxidant dosage, catalyst dose, initial RG 5 concentration, and irradiation time) were assessed in sunlight radiance. The appropriate conditions for photocatalytic breakdown were pH = 3, catalyst amount = 10 mg/L, oxidant dose = 10 mM and initial RG 5 dye concentration of 20 ppm employing a ternary PGB composite, and RG 5 dye was degraded extensively within 1 h. Under optimal conditions, the ternary PGB composite was used to accomplish 95 % degradation efficiency. The kinetic assessment indicated that experimental findings were in significant agreement with the Behnajady-Modirshahla-Ghanbery model. Reusability experiments demonstrated that catalysts may be used five times successively. Samples showed effective antibacterial properties against strains of S. aureus and E. coli and minimal cytotoxicity. A scavenging study indicated that hydroxyl radicals were the most significant reactive oxygen species involved in the photocatalytic breakdown of RG 5 dye.

Raheeba Akbar, Haq Nawaz Bhatti, Muhammad Zahid, Muhammad Yasin Naz