Endud, Salasiah and Wong, Ka Lun (2007) Mesoporous silica MCM-48 molecular sieve modified with SnCl2 in alkaline medium for selective oxidation of alcohol. Microporous and Mesoporous Materials, 101 (1-2). pp. 256-263. ISSN 1387-1811
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Official URL: http://dx.doi.org/10.1016/j.micromeso.2006.12.029
Tin modified mesoporous silica MCM-48 with various Si/Sn ratios were synthesized under alkaline media by post-synthesis modification using rice husk ash as Si precursor and SnCl2 as tin source. Physicochemical information of the materials was obtained by XRD, N2-physisorption, FESEM, UV-VIS diffuse reflectance and FTIR spectroscopies. The tin modified MCM-48 samples were selective in the oxidation of benzyl alcohol to benzaldehyde by using tert-butyl hydroperoxide aqueous solution as oxidant. The catalytic activity can be correlated with the strong Lewis acidity generated by the presence of tin species in Si-MCM-48. The re-usability of tin modified MCM-48 catalysts and the effect of substrate to oxidant ratio on the catalytic activity are discussed.
|Uncontrolled Keywords:||MCM-48, tin modified, heterogeneous catalyst, lewis acidity, oxidation of alcohol|
|Subjects:||Q Science > QD Chemistry|
|Deposited By:||Maznira Sylvia Azra Mansor|
|Deposited On:||06 Jan 2009 01:03|
|Last Modified:||06 Jan 2009 01:03|
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