Synthesis, structure, characterization and photocatalytic activity of Bi2Zr2O7 under solar radiation

Sharma, Vaishali M and Saha, Dipankar and Madras, Giridhar and Row, Guru TN (2013) Synthesis, structure, characterization and photocatalytic activity of Bi2Zr2O7 under solar radiation. In: RSC ADVANCES, 3 (41). pp. 18938-18943.

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Abstract

Bi2Zr2O7 was synthesized via a facile solution combustion method. Two different fuels, urea and tartaric acid were used in the synthesis, which resulted in Bi2Zr2O7 crystals with different band gaps and surface areas. The structure has been determined by Rietveld refinement followed by the difference Fourier technique. The compound crystallizes in the space group Fm (3) over barm. The photocatalytic degradation of two dyes was carried out under solar radiation. Bi2Zr2O7 prepared using urea as the fuel exhibits a higher photocatalytic activity than the compound prepared using tartaric acid and comparable activity to that of commercial Evonik P-25 TiO2. It is suggested that this is due to the oxygen vacancies occurring in the two cases, the urea based compound has an occupancy of 0.216, whereas the tartaric acid based synthesis shows disorder in the oxygen position amounting to a small number of oxygen vacancies.

Item Type:	Journal Article
Publication:	RSC ADVANCES
Publisher:	ROYAL SOC CHEMISTRY
Additional Information:	copyright for this article belongs to Publisher
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	16 Nov 2013 13:57
Last Modified:	16 Nov 2013 13:57
URI:	http://eprints.iisc.ac.in/id/eprint/47765

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