%0 Journal Article %J Journal of Photochemistry and Photobiology A-Chemistry %D 2009 %T Chlorophyll-based photocatalysts and their evaluations for methyl orange photoreduction %A Joshi, Meenal M. %A Kamble, Sanjay R. %A Labhsetwar, Nitin K. %A Parwate, D. V. %A Rayalu, Sadhana S. %K Chlorophyll-based photocatalyst %K Mesoporous material %K Methyl orange %K Photoreduction %X

Immobilization of chlorophyll on different functionalized mesoporous materials has been attempted. The replacement of butanediol with monoethanol amine has resulted in increase in chlorophyll loading by a factor of two. The maximum immobilization of chlorophyll was on MCM-41 functionalized with monoethanolamine MCM-41/MEA/Chl) as compared to other mesoporous materials. This material has been characterized using XRD, UV-vis diffuse reflectance spectroscopy, scanning electron microscopy (SEM-EDX) and fluorescence spectroscopy. The photocatalytic reduction of methyl orange (MO)was studied using MCM-41/MEA/Chl as photocatalyst under the visible light. The photocatalytic reduction of MO was 0.396 mg/g of MCM-41/MEA/Chl photocatalyst as compared to 0.508 mg/g of TiO(2) for that of Degussa P-25 photocatalyst. The effect of various operating parameters like catalyst loading, initial concentration and intensity of light has also been studied. Photocatalytic property of chlorophyll-based photocatalytic material indicates that chlorophyll acts as a reaction center, which absorbs visible light and generates electron, which is transferred to different electron acceptors reducing MO into derivative of hydrazine. (C) 2009 Elsevier B.V. All rights reserved.

%B Journal of Photochemistry and Photobiology A-Chemistry %I ELSEVIER SCIENCE SA %C PO BOX 564, 1001 LAUSANNE, SWITZERLAND %V 204 %P 83-89 %8 MAY %G eng %N 2-3 %3 Foreign %4 2.243 %R 10.1016/j.jphotochem.2009.01.016