Title: Preparation and characterisation of visible-light-driven BaCo_0.5Y_0.5O₃ photocatalyst

Authors: R.M. Mohamed, K. Mori, T. Ohmichi, H. Yamashita

Addresses: Nanostructured Materials Lab., Department of Advanced Materials, Central Metallurgical R&D Institute, Helwan, 11421, Cairo, Egypt. ' Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan. ' Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan. ' Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan

Abstract: In this work, the synthesis of BaCo_0.5Y_0.5O₃ visible-light-driven photocatalyst was studied via the sol-gel method. When the calcinations temperature was 1000°C, a pure perovskite phase was obtained. The particle size and crystallinity of BaCo_0.5Y_0.5O₃ powders markedly increased with a rise in the calcination temperature. The band gap of BaCo_0.5Y_0.5O₃ calculated using the UV-visible spectra was found to be less than that of titania. BaCo_0.5Y_0.5O₃ was shown to posses photocatalytic activity under visible light irradiation. The activity of BaCo_0.5Y_0.5O₃ depended strongly on the synthesis temperature.

Keywords: photocatalysts; BaCo0.5Y0.5O3; sol-gel; perovskite.

DOI: 10.1504/IJNM.2009.028133

International Journal of Nanomanufacturing, 2009 Vol.4 No.1/2/3/4, pp.257 - 266

Published online: 07 Sep 2009 *

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