| Issue |
Korean Chemical Engineering Research,
Vol.47, No.3, 275-280, 2009
Vol.47, No.3, 275-280, 2009
스티렌 산화반응에 대한 V-KIT-6의 촉매특성 고찰
Catalytic Performance of V-KIT-6 for the Oxidation of Styrene
바나듐이 담지된 3차원 입방구조의 V-KIT-6를 Pluronic P123 공중합체를 구조형성제로 사용하고, 부탄올을 보조 계면활성제로 사용하여 TEOS와 NH4VO3로부터 수열합성법으로 제조하였다. 제조한 V-KIT-6는 좁은 기공분포(~6.0 nm)를 가지고 넓은 비표면적(~1,000 m2/g)을 보여주었다. V-KIT-6에서 V의 배위 특성 등은 51V 스핀 공명 NMR과 ESR을 이용하여 분석하였다. 제조된 V-KIT-6는 테트라부틸 하이드로 퍼옥사이드(TBHP)를 산화제로 사용한 스티렌의 직접산화반응에서 우수한 촉매활성을 나타내었다.
The direct incorporation of vanadium into the three-dimensional(3-D) cubic Ia3d mesostructure designated as V-KIT-6 was carried out hydrothermally using a Pluronic P123 and n-butanol as the structure-directing mixture, tetraethylorthosilicate(TEOS) as the silica source and NH4VO3 as the vanadium source. The obtained V-KIT-6 showed a very high specific surface area ~1,000 m2/g with tunable pore diameters in narrow distribution of sizes ~6.0 nm. The coordination and
nature of V sites in V-KIT-6 are characterized by 51V-spin-echo NMR analysis. 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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