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ARTICLE

Synthesis of Mn²⁺ modified CdS nanoparticles and its application as catalyst in photodegradation of methyl red dye

R. Ranjan^a, C. M. S. Negi^b, K. P. Tiwary^c,*

a Department of Electronics and communication Engineering, Birla Institute of Technology Mesra, Patna Campus, Patna-800014, India
b Department of Physical Sciences,Banasthali Vidyapith-304022 (Rajasthan), India
c Department of Physics, Birla Institute of Technology Mesra, Patna Campus, Patna-800014, India

* Corresponding Author:

Chalcogenide Letters 2023, 20(4), 251-259. https://doi.org/10.15251/CL.2023.204.251

Received 03 March 2023; Accepted 07 April 2023;

Abstract

Photocatalytic degradation of methyl red dye using Mn(5%) doped CdS nanoparticles was studied.Mn doped CdS nanoparticles was synthesized by microwave assisted solvo thermal method where the chemicals used wereCadmium Acetate [(CH₃COO)₂Cd, H₂O], Manganese Chloride [MnCl₂.2H₂O] and Sodium Sulfide [Na₂S.xH₂O]. X-Ray diffraction(XRD) analysis was carried out in order to analyze the structural dimensions of the synthesized nanoparticles and the average crystallite size has been calculated at the full width half maximum (FWHM) of the diffraction peaks using Debye-Scherer equation and it was found to be around2.3nm. FTIR spectra analysis was done in order to analyze different functional and vibrational groups present in the as synthesized sample of Mn doped CdSnanoparticles.The morphology of sample wasstudied by scanning electron microscope. The aqueous solution of methyl red[C₁₅H₁₅N₃O₂] has been prepared and was mixed with the as synthesized Mn doped CdSnanoparticles and was exposed for photocatalytic degradation using 100 W bulb. UV-visible spectra of the light irradiated methyl red solutions were studied at different interval of time and no red shift was observed with increase of exposure time. The intensity of the absorption peak was also found to be reduced with the increasing time interval. The photo degradation of methyl red dye was observed up to 90% at the exposure time of 90 minutes.

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