Cadmium sulfide (CdS) nanoparticle has been successfully synthesized by electrochemical method which is simple and inexpensive method. The synthesized CdS nanoparticles were used as a catalyst for the photodegradation of trichloroacetic acid, chloroacetic acid and acetic acid under various experimental conditions by volumetric method. The CdS nanoparticles were characterized by various techniques such as SEM-EDAX, UV-Visible spectroscopy, FTIR-IR spectrum and X-ray diffraction studies. The study of UV-Visible spectroscopy revealed that the CdS nanoparticles showed that the maximum intensity peak at 253.64 nm in the UV-region and the band gap energy is found to be 2.39 nm which was calculated using Tauc-plot. The SEM results showed that the CdS nanoparticles have spherical shape. The EDAX spectra revels the presence of Cd and S in the nanoparticles. From XRD data, the structure of CdS nanoparticles was found to be cubic structure and crystallite size was found to be 16.10 nm. The photocatalytic activity of the synthesized CdS nanoparticles was investigated by the kinetics of photodegradation of carboxylic acids by volumetric method by using NaOH solution. Taft LFER was tested, the isokinetic temperature β was calculated for oxidation of carboxylic acids. The antibacterial activity of CdS nanoparticles was investigated by using gram positive (Bacillus subtilis MTCC 2763) and gram negative (Escherichia coli MTCC 40) bacteria by disc diffusion Kirby-Bauer method in Mueller Hinton Agar Plate by determining the ZOI.

Keywords: Electrochemical Method; CdS Nanoparticles; Carboxylic Acids; LFER; Antibacterial Activity;