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In relation to this article, we declare that there is no conflict of interest.
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Received December 9, 2008
Accepted February 10, 2009
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Direct incorporation of vanadium into three-dimensional KIT-6: 2. Reactivity test for styrene oxidation

Division of Chemical Engineering, Pusan National University, Busan 609-735, Korea
dwpark@pusan.ac.kr
Korean Journal of Chemical Engineering, September 2009, 26(5), 1241-1245(5), 10.1007/s11814-009-0202-y
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Abstract

The direct incorporation of vanadium into the three-dimensional (3-D) cubic Ia3d mesostructure designated as V-KIT-6 was prepared, and the material obtained therein showed a very high specific surface area of ~1,000 m2/g with tunable pore diameters in a narrow distribution of sizes, ~5.7 to 6.0 nm. The coordination and nature of the V sites in V-KIT-6 were characterized by 51V-spin-echo NMR analysis. It shows that after calcination, the V^(4+) species are totally oxidized to the V^(5+) state with 4- and 6-coordinated V-O environments in a highly dispersed state with much less crystalline V2O5 formation. The calcined V-KIT-6 materials showed excellent catalytic activity in the direct oxidation of styrene using tert-butyl hydroperoxide (TBHP) as an oxidant.

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