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Fikadu Tsehaye, Om Prakash Yadav and Lokesh Yadav; Effects of operational parameters on degradation of methyl orange dye over nanosized CdS photocatalyst under UV Radiation; Advanced Materials and Technologies Environmental Sciences; 2017:1(3):98-107
Nano-sized CdS has been prepared by aqueous chemical method using glycine as a capping and stabilizing agent. X-ray diffraction (XRD) analysis of as-synthesized material revealed hexagonal wurtzite structure of CdS with average crystallite size 48.1 nm. The observed FTIR spectra support the template role of glycine in controlling the size of CdS nanoparticles. Photo-catalytic efficiency of CdS nanoparticles was investigated under UV irradiation following degradation of methyl orange (MO), as a probe. Effect of some operational parameters such as photo-catalyst load, pH of solution and substrate (MO) initial concentration on the photo-catalytic degradation of the dye have been investigated. Using methyl orange initial concentration 300 mg/L, optimum photo-catalyst load 120 mg /L and pH 4.0, as high as 92 % degradation of methyl orange could be achieved under UV radiation. The photo-catalytic method developed here can be used for large scale treatment of water bodies contaminated with methyl orange dye.