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A novel scheelite-like structure of $BaBi_2Mo_4O_{16}$: Photocatalysis and investigation of the solid solution, $BaBi_{2}Mo_{4−x}W_xO_{16}$(0.25≤x≤1)

Muktha, B and Madras, Giridhar and Row, Guru TN (2006) A novel scheelite-like structure of $BaBi_2Mo_4O_{16}$: Photocatalysis and investigation of the solid solution, $BaBi_{2}Mo_{4−x}W_xO_{16}$(0.25≤x≤1). In: Journal of Photochemistry and Photobiology A: Chemistry . (In Press)

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Abstract

A barium bismuth molybdate, $BaBi_2Mo_4O_{16}$was synthesized for the first time. The compound was made by the solid- state technique and studied for photocatalytic degradation of water pollutants. The compound crystallizes in the monoclinic C2/c system with a = 5.317 (1) Å, b = 12.875 (2) Å, c = 19.390 (3) Å, b = 101.512 (4)°, V = 1327.1 (4) Å^3 and Z = 4. The crystal structure along the a axis consists of layers of $[Bi_2O_2]$ units and $BaO_{10}$ polyhedra both surrounded isolated $MoO_4$ tetrahedra representing a scheelite-like structure. Photocatalytic degradation of phenols and substituted phenols, acids and dyes were studied using $BaBi_2Mo_4O_{16}$ as catalyst. The catalyst shows selectivity towards chlorine containing aromatics. Substitution of tungsten for molybdenum resulted in retention of structure within the limits 0.25 ≤ x ≤ 1 of the solid solution,$BaBi_2Mo_{4-x}W_xO_{16}$. The phases, x = 0.25, 0.50, 0.75 and 1.0, in the solid solution were also used to study the photocatalytic degradation of water pollutants like phenol, substituted phenols and dyes. The photocatalytic activity increases slightly with an increase in substitution of tungsten in the solid solution domain.

Item Type: Journal Article
Additional Information: As on 29/01/2007, the Corrected Proof of this article is in press.
Keywords: Single crystal X-ray diffraction;Barium bismuth molybdate; Crystal structure;Photocatalysis;Phenols
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 29 Jan 2007
Last Modified: 19 Sep 2010 04:33
URI: http://eprints.iisc.ernet.in/id/eprint/9117

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