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Synthesis, characterisation and photocatalytic activity of Ag+- and Sn2+-substituted KSbTeO6

Ravinder Guje, Prathapuram Shrujana, Naveen Kumar Veldurthi, Ravi Gundeboina, Nageshwar Rao Kappera, and Vithal Muga

Department of Chemistry, Osmania University, Hyderabad 500 007, India

 

E-mail: mugavithal@gmail.com

Abstract: Ag+- and Sn2+-substituted KSbTeO6 were prepared by a facile ion-exchange method at ambient temperature. All the samples were characterised by scanning electron microscopy, energydispersive spectra, thermogravimetric analysis, powder X-ray diffraction, Raman spectra and UV-VIS diffuse reflectance spectra. Both Sn2+- and Ag+-substituted KSbTeO6 were crystallised in a cubic lattice with the Fd3̅m space group. The band-gap energy of all the samples was deduced from their UV-VIS diffuse reflectance spectral profiles. The visible light-induced photocatalytic oxidation of the methylene blue (MB) dye was examined in the presence of all the as-prepared materials. The Ag+- and Sn2+-substituted KSbTeO6 exhibited a higher photocatalytic activity than the parent KSbTeO6 in degradation of the MB dye under visible light irradiation.

Keywords: defect pyrochlore – X-ray diffraction – Raman spectroscopy – photodegradation

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2015-0013

 

Chemical Papers 69 (2) 269–278 (2015)

Wednesday, May 22, 2024

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