Efficient Adsorption and Catalytic Reduction of Phenol Red Dye by Glutaraldehyde Cross-Linked Chitosan and Its Ag-Loaded Catalysts: Materials Synthesis, Characterization and Application

In this study, glutaraldehyde cross-linked chitosan support, as well the catalysts obtained after loading Ag metal (Ag/Chitosan), were synthesised and applied for adsorption reduction of phenol red dye in an aqueous solution. The Ag/chitosan characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) inductively coupled plasma-optical emission spectrometry (ICP-OES) analysis techniques. catalytic performance with chitosan, respectively, was performed at ambient reaction conditions. carried out using sodium borohydride (NaBH4) reducing agent, while progress study monitored ultraviolet-visible (UV-vis) spectrophotometry technique. varied amount catalyst, concentration NaBH4, loading, temperature, initial pH solution a nearly-neutral (6.4) allowed efficient dye, acidic (pH = 4) alkaline 8, 11, 13.8) solutions showed incomplete or no dye. reusability catalyst complete where significant loss activity observed. Hence, applicability Ag/catalyst thus proven both can be industrial wastewater treatment.