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Enhancement of visible light irradiation photocatalytic activity of \(\hbox {SrTiO}_{3}\) nanoparticles by Pt doping for oxidation of cyclohexane

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Abstract

In this research, strontium titanate (\(\hbox {SrTiO}_{3})\) nanoparticles were synthesised using an ultrasonic method, then were doped with Pt using a photo-assisted deposition method to form \(\hbox {Pt}/\hbox {SrTiO}_{3}\) nanoparticles. \(\hbox {SrTiO}_{3}\) and \(\hbox {Pt}/\hbox {SrTiO}_{3}\) nanoparticles were characterized by XRD, XPS, TEM, BET surface area UV–Vis and PL techniques in order to explore their chemical and physical properties. The visible light irradiation photocatalytic performances of \(\hbox {SrTiO}_{3}\) nanoparticles and \(\hbox {Pt}/\hbox {SrTiO}_{3}\) nanoparticles for photocatalytic oxidation of cyclohexane was investigated, and the results revealed that platinum was doped onto the \(\hbox {SrTiO}_{3}\) nanoparticles surfaces as metallic platinum, and the weight percent of doped platinum greatly affected the band gap, and the 1.5 wt% \(\hbox {Pt}/\hbox {SrTiO}_{3}\) nanoparticles showed the highest photocatalytic activity due to the low band gap. The stability of the \(\hbox {Pt}/\hbox {SrTiO}_{3}\) nanoparticles for the photocatalytic oxidation of cyclohexane was examined and the results revealed that the \(\hbox {Pt}/\hbox {SrTiO}_{3}\) nanoparticles could be used five times without losing their efficiency.

Graphical Abstract

TEM images of \(\hbox {SrTiO}_{3 }\) (A) and 1.5 wt% \(\hbox {Pt}/\hbox {SrTiO}_{3}\) (B) nanoparticles, which showed that \(\hbox {SrTiO}_{3}\) is a spherical nanoparticle (A) and that platinum was doped as dots (B).

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Acknowledgements

This work was funded by the Deanship of Scientific Research (DSR), King Abdulaziz University, Jeddah, under Grant No. (130-94-D1435). The authors acknowledge and thank DSR technical and financial support.

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Authors and Affiliations

  1. Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80200, Jeddah, 21589, Saudi Arabia

    Mohamed Abdel Salam

  2. Chemistry Department, College of Alwajh, University of Tabuk, Al Wajh, Saudi Arabia

    Hind Al-Johani

Authors
  1. Mohamed Abdel Salam
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  2. Hind Al-Johani
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Correspondence to Mohamed Abdel Salam.

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Abdel Salam, M., Al-Johani, H. Enhancement of visible light irradiation photocatalytic activity of \(\hbox {SrTiO}_{3}\) nanoparticles by Pt doping for oxidation of cyclohexane. J Chem Sci 129, 1687–1693 (2017). https://doi.org/10.1007/s12039-017-1369-0

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  • DOI: https://doi.org/10.1007/s12039-017-1369-0

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