High Surface Area SnO2-Ta2O5 Composite for Visible Light-driven Photocatalytic Degradation of an Organic Dye

Velaga, Bharath and Shanbogh, Pradeep P and Swain, Diptikanta and Narayana, Chandrabhas and Sundaram, Nalini G. (2018) High Surface Area SnO2-Ta2O5 Composite for Visible Light-driven Photocatalytic Degradation of an Organic Dye. In: PHOTOCHEMISTRY AND PHOTOBIOLOGY, 94 (4). pp. 633-640.

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Abstract

SnO2-Ta2O5 nanocomposite was synthesized by a facile coprecipitation method and further calcined to obtain crystalline powder. Phase formation, morphology, bandgap and photocatalytic properties were analyzed using powder X-ray diffraction, scanning electron microscopy, UV-Vis diffused reflectance spectroscopy, BET surface area and Raman spectroscopy, respectively. Effect of calcination temperature on the crystallinity of the composite was studied. The as-prepared samples of SnO2, Ta2O5 and SnO2-10wt%Ta2O5 composite as well as the calcined composite sample were tested for photocatalytic activity for methylene blue dye degradation under visible light. Photocatalytic studies reveal that the as-prepared SnO2-10wt%Ta2O5 composite showed the best photocatalytic activity for the degradation of methylene blue (MB) by harvesting visible-light radiation efficiently. Further mineralization of methylene blue, estimated by COD analysis, is found to have degraded with an efficiency of 91.6%. The study demonstrates that heterostructure of SnO2-Ta2O5 nanocomposite could be applied in photocatalytic purification of organic pollutants.

Item Type:	Journal Article
Publication:	PHOTOCHEMISTRY AND PHOTOBIOLOGY
Publisher:	WILEY, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
Additional Information:	Copyright of this article belong to WILEY, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	24 Jul 2018 15:15
Last Modified:	24 Jul 2018 15:15
URI:	http://eprints.iisc.ac.in/id/eprint/60287

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