High Surface Area SnO2 -Ta2 O5 Composite for Visible Light-driven Photocatalytic Degradation of an Organic Dye

Velaga, Bharath ; Shanbogh, Pradeep P. ; Swain, Diptikanta ; Narayana, Chandrabhas ; Sundaram, Nalini G. (2018) High Surface Area SnO2 -Ta2 O5 Composite for Visible Light-driven Photocatalytic Degradation of an Organic Dye Photochemistry and Photobiology, 94 (4). pp. 633-640. ISSN 0031-8655

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Official URL: http://doi.org/10.1111/php.12896

Related URL: http://dx.doi.org/10.1111/php.12896

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:Article
Source:Copyright of this article belongs to American Society for Photobiology.
ID Code:124185
Deposited On:08 Nov 2021 07:39
Last Modified:08 Nov 2021 07:39

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