Synthesis of CdS@ZnOCF Nanocomposite for Enhanced Photocatalytic Degradation and Antibacterial Activity
Loading...
Date
2023
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
UMT, Lhr
Abstract
Environmental pollution caused by the improper disposal of waste materials, particularly organic dyes from various industries into water bodies is considerable. It is important to do comprehensive studies on photocatalytic materials in order to effectively remove dangerous contaminants from water. In this respect porous carbon based materials have drawn great attention due to their novel properties. In this work, CdS@ZnO/CF nanocomposite has been prepared by the hydrothermal method. The nanocomposite was characterized by FTIR, XRD, TGA, SEM and EDX. The prepared nanocomposite has a high efficiency to degrade the methylene blue under sunlight light irradiation as compared to the individual CdS and ZnO/CF nanoparticles. CdS@ZnO/CF nanocomposite decrease the charge recombination and increase the charge separation which enhance the photocatalytic degradation activity (up to 98%). The catalyst amount, light exposure, concentration of MB were optimized. After comprehensive experiments 0.04g catalyst , 100mW/cm2 for 80mins light exposure, 30ppm concentration of MB were selected as optimum values for further analysis. The nanocomposite was recovered after several cycles and demonstrated degradation rate around 90 %. In addition, the CdS@ZnO/CF nanocomposite successfully inhibited famous type of pathogens (E.coli, Bacillus subtilis). These pathogens showed higher activity of 30mm and 15mm at 300ppm solution of catalyst. The generation of the reactive oxygen species (ROS) at the surface of metal ions were thought to be important for the powerful antibacterial activity of the CdS@ZnO/CF nanocomposite. These reactive species penetrated into the cell wall of the bacteria which leads to their destruction. Thus, it has been proven from results that the CdS@ZnO/CF nanocomposite showed remarkable photocatalytic activity for the degradation of organic dyes, with strong antibacterial activity.