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Synthesis, structural and photocatalytic studies of Mn-doped CdS nanoparticles

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Abstract

Mn-doped CdS nanoparticles (Cd1−x Mn x S; where x = 0.00–0.10) were synthesized by a chemical precipitation method. The synthesized products were characterized by X-ray diffraction (XRD), scanning electron microscope, transmission electron microscope (TEM), and UV–Vis spectrometer. The XRD and TEM measurements show that the size of crystallites is in the range of 10–40 nm. Optical measurements indicated a red shift in the absorption band edge upon Mn doping. The direct allowed band gaps of undoped and Mn-doped CdS nanoparticles measured by UV–Vis spectrometer were 2.3 and 2.4 eV at 400 °C, respectively. Photocatalytic activities of CdS and Mn-doped CdS were evaluated by irradiating the solution to ultraviolet light and taking methyl orange (MO) as organic dye. It was found that 5 mol% Mn-doped CdS bleaches MO much faster than undoped CdS upon its exposure to the ultraviolet light. The experiment demonstrated that the photo-degradation efficiency of 5 mol% Mn-doped CdS was significantly higher than that of undoped CdS.

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Acknowledgements

TGhe authors are grateful to Dr. Sanjeev Aggrawal and Nidhi Sekhawat, Kurukshetra University, Kurukshetra, for technical support in obtaining UV–Vis spectra. The authors are also grateful to the Director, NIT, Kurukshetra, for XRD facilities in the physics department.

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Authors and Affiliations

  1. Department of Chemistry, Sant Longowal Institute of Engineering & Technology, Longowal, 148 106, India

    Ruby Chauhan & Ram Pal Chaudhary

  2. Technology Education and Research Integrated Institutions, Kurukshetra, 136 119, India

    Ruby Chauhan

  3. Department of Physics, National Institute of Technology, Kurukshetra, 136 119, India

    Ashavani Kumar

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  1. Ruby Chauhan
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  2. Ashavani Kumar
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  3. Ram Pal Chaudhary
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Correspondence to Ashavani Kumar.

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Chauhan, R., Kumar, A. & Chaudhary, R.P. Synthesis, structural and photocatalytic studies of Mn-doped CdS nanoparticles. Res Chem Intermed 39, 645–657 (2013). https://doi.org/10.1007/s11164-012-0586-x

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  • DOI: https://doi.org/10.1007/s11164-012-0586-x

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