Sol-Gel Developed CdS Nanoparticles for Photocatalytic Degradation of Alizarin Red

In the present study photocatalytic degradation of a hazardous water soluble alizarin red dye in aqueous suspension of nanosized CdS particles. CdS nanoparicles have been developed from the sol gel method. Photocatalytic degradation of alizarin red have been studied with the help of variety of parameters such as catalyst dose, dye concentration, pH, contact time and most important COD and TOC study. It was observed that photocatalytic degradation of alizarin red dye by CdS nanoparticles was an effective, economic and faster mode of removing dye from an aqueous solution. The optimum condition for the degradation of the dye was 50 mg/L, pH 8.4, catalyst dose 50 mg/L and contact time 30 minutes. Chemical oxygen demand and total organic carbon of the photodegraded dye solution substantially decreased. The kinetics studies also have been study. Besides the above, the XRD and SEM studies were carried out for morphological features and size of the CdS particles.