Abstract—Mechanochemical method was used to synthesize Mn doped ZnS and undoped ZnS. The particles were characterized using XRD measurements and TEM analysis. The particle size for different doping concentration was found to be 4.19nm, 3.8nm, 2.68nm. Also the particle size of pure ZnS was found to be 4.79nm. The FTIR results showed that Mn2+ ions were incorporated in host ZnS. The dye adsorption was maximum at pH=4. The photoluminescence study revealed that PL intensity increased with increase in doping concentration. The as prepared nanoparticles were further used for degradation of malachite green dye where the dye adsorption/ interaction on photocatalyst were studied using PL spectra. The PL spectra of dye absorbed photocatalyst showed that PL intensity increased manifolds due to dye adsorption. The maximum dye degradation (97%) was found for Zn1-xMnxS (x=0.01) concentration with maximum rate constant (0.026 min-1).
Index Terms—Malachite green, mechanochemical method, photocatalytic degradation, Mn doped ZnS
J. Tolia is with the Department of Chemical Engineering, V.V.P. Engineering College, Rajkot, and Gujarat, India.
J. Tolia, M. Chakraborty, and Z.V. P Murthy are with the Department of Chemical Engineering, SVNIT, Surat 395007, Gujarat, India
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Cite: Jyoti Tolia, Mousumi Chakraborty, and Z.V. P Murthy, "Study of Dye Interaction with Mn Doped ZnS Using Photoluminescence Characteristics in Degradation of Malachite Green," International Journal of Chemical Engineering and Applications vol. 3, no. 2, pp. 136-140, 2012.
