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Correlation for Photocatalytic Degradation Kinetics of Carboxylic Acids by Electrochemically Synthesized Cd/ZnO Nanoparticles and Study of Antibacterial Behaviour

Shilpa R., Charan Kumar H.C., Sannaiah Ananda

Abstract


Cd/ZnO nanoparticle has been successfully synthesized by electrochemical method which is simple and inexpensive method. The synthesized Cd/ZnO nanoparticle was used has a catalyst for the photodegradation of Oxalic acid, Chloroacetic acid and Formic acid under various experimental conditions by volumetric method. The Cd/ZnO 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 Cd/ZnO nanoparticles showed that the maximum intensity peak at 302.12 nm in the UV-region and the band gap energy is found to be 2.64 nm and which was calculated using Tauc-plot. The SEM results shows that the particles were agglomerated ZnO with Cd. The EDAX spectra revels the presence of Cd, Zn and O. The structure of Cd/ZnO nanoparticles was found to be cubic structure and average crystal size was found to be 26.32 nm which was confirmed from XRD data. The photocatalytic activity of the synthesized Cd/ZnO 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 Cd/ZnO 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, Cd/ ZnO nanoparticles, Carboxylic acids, antibacterial activity

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