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Synthesis and characterization of multimetallic-core and siliceous-shell Au/Pt/Ag@SiO2 sol–gel derived nanocomposites

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Abstract

Trimetallic Au/Pt/Ag nanocomposite loaded amine functionalized silica nanopowder (Au/Pt/Ag@SiO2 nanopowder) is prepared through sol–gel route. Surface morphology and bulk composition of the composite were obtained using atomic force microscopy, field-emission scanning electron microscopy, high-resolution transmission electron microscopy and energy dispersive X-ray spectroscopy. Brunauer–Emmett–Teller (BET) surface area, the pore volume and pore radius of the composite particles are calculated by applying the BET equation to the sorption isotherms. In addition to that, UV–Vis-diffuse reflectance spectrum was analyzed for the synthesized composite. The synthesized composite is proposed as the promising photocatalyst for the decolouration of methyl violet dye.

Graphical abstract

We have successfully reported the syntheses and photocatalytic decolouration activity of MV dye in aqueous solution under UV-A light irradiation by SiO2 and Au/Pt/Ag@SiO2 nanopowder. The sol–gel synthesized Au/Pt/Ag@SiO2 nanopowder is proposed as a promising photocatalyst for the decolouration of MV dye. The metallic core and siliceous shell enhance the photocatalytic decolouration activity.

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Acknowledgments

The authors are grateful to Dr. B. Shanthi, (Centralized Instrumentation Service Laboratory, Department of Physics, Annamalai University) for assistance with AFM analysis. FE-SEM images were recorded at Centre for Nanoscience and Nanotechnology, Sathyabama University, Chennai. The authors are highly thankful to Prof. T. Pradeep for HR-TEM images. UV–Vis-DRS data were recorded at the University of Hyderabad. We also thank Dr. B. Subash and Mr. A. Narayanan for N2 sorption measurements. Author B. L wishes to acknowledge the University Grants Commission (UGC)-Basic Sciences Research (BSR)-Special Assistant Programme (SAP) Fellowship from the UGC, New Delhi, India.

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The authors declare no competing financial interest.

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Authors and Affiliations

  1. Department of Chemistry, Annamalai University, Annamalainagar, Chidambaram, 608 002, Tamilnadu, India

    B. Loganathan, V. L. Chandraboss, M. Murugavelu, S. Senthilvelan & B. Karthikeyan

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  1. B. Loganathan
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  2. V. L. Chandraboss
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  3. M. Murugavelu
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  4. S. Senthilvelan
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  5. B. Karthikeyan
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Correspondence to B. Karthikeyan.

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Loganathan, B., Chandraboss, V.L., Murugavelu, M. et al. Synthesis and characterization of multimetallic-core and siliceous-shell Au/Pt/Ag@SiO2 sol–gel derived nanocomposites. J Sol-Gel Sci Technol 74, 1–14 (2015). https://doi.org/10.1007/s10971-014-3564-5

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  • DOI: https://doi.org/10.1007/s10971-014-3564-5

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