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Photocatalytic and Antibacterial Activities of Ag/ZnO Nanocomposities Fabricated by Co-Precipitation Method

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

A Ag/ZnO nanocomposite has been synthesized and characterized for investigating its photocatalytic activity. The morphology and particle size of the Ag/ZnO was studied by scanning electron microscope (SEM) and the microstructure of the as-synthesized nanocomposite was confirmed by X-ray diffraction (XRD) analysis. The elemental composition of the metal oxide was determined by energy dispersion spectrometry (EDS). Diffuse reflectance spectra (DRS), Photoluminescence (PL) spectra, and Fourier transform infrared spectroscopy (FTIR) were also studied for characterizing the nanocomposite. The average particle size was found to be around 20–30 nm. Photocatalytic activity of Ag/ZnO has been investigated over methyl violet (6B) dye under UV and visible light irradiation. The degradation of methyl violet (6B) dye using ZnO and Ag/ZnO was compared and found that Ag/ZnO composite is more efficient than ZnO. The rate of disappearance of dye was monitored spectrophotometrically in the maximum visible absorption wavelength and the extent of degradation was discussed in terms of Langmuir–Hinshelwood model. The Ag/ZnO composite was found capable of degrading the industrial dye effluent. Effect of H2O2 addition on dye degradation by the Ag/ZnO was investigated and Ag/ZnO was found to be an effective antimicrobial agent. Reusability of Ag/ZnO catalyst was also tested.

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Acknowledgments

We gratefully acknowledge Professors Tuula T. Pakkanen and Mika Suvanto, Department of Chemistry, University of Eastern Finland, Finland, for providing XRD, SEM, and EDS facilities for this research.

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Authors and Affiliations

  1. Department of Chemistry, Shah Jalal University of Science and Technology, Sylhet, Bangladesh

    Md. Abdus Subhan, M. R. Awal, Tanzir Ahmed & M. Younus

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  1. Md. Abdus Subhan
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  2. M. R. Awal
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  3. Tanzir Ahmed
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  4. M. Younus
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Correspondence to Md. Abdus Subhan.

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Subhan, M.A., Awal, M.R., Ahmed, T. et al. Photocatalytic and Antibacterial Activities of Ag/ZnO Nanocomposities Fabricated by Co-Precipitation Method. Acta Metall. Sin. (Engl. Lett.) 27, 223–232 (2014). https://doi.org/10.1007/s40195-014-0038-2

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  • DOI: https://doi.org/10.1007/s40195-014-0038-2

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