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Synthesis, Characterization and Photocatalytic Activity of Lanthanide (Ce, Pr and Nd) Orthovanadates

Mahapatra, Sudarshan and Madras, Giridhar and Row, Guru TN (2007) Synthesis, Characterization and Photocatalytic Activity of Lanthanide (Ce, Pr and Nd) Orthovanadates. In: Industrial and Engineering Chemistry Research, 46 (4). pp. 1013-1017.

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Abstract

A new approach to the synthesis of the lanthanide orthovanadates $CeVO_4, PrVO_4, and NdVO_4$ is proposed. These compounds exhibit a tetragonal zircon structure, crystallizing in the space group $I4_1/amd$ with a=7.3733(4) Å, c=6.4909(4) Å, and Z=4. The crystal structure has been analyzed by powder X-ray diffraction and FTIR and UV-visible spectroscopies. Particle sizes were found to be in the range of 200-300 nm as seen by scanning electron microscopy, and energy-dispersive X-ray analysis indicated the formation of $LnVO_4$. Thermal analysis of these solids indicated stability of the phase to 1000 °C. The photocatalytic activity of these compounds was investigated for the first time by the degradation of methylene blue. The degradation rates were similar for all compounds and comparable to that of commercial Degussa titania.

Item Type: Journal Article
Additional Information: Copyright of this artile belongs to American Chemical Society.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 28 Jun 2007
Last Modified: 19 Sep 2010 04:36
URI: http://eprints.iisc.ernet.in/id/eprint/10232

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