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나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
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Anatase TiO2 nanosheets with surface acid sites for Friedel-Crafts alkylation

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Title
Anatase TiO2 nanosheets with surface acid sites for Friedel-Crafts alkylation
Author(s)
Munhee Lee; Yongbeom Seo; Hye Sun Shin; Changbum Jo; Ryong Ryoo
Publication Date
2016-03
Journal
MICROPOROUS AND MESOPOROUS MATERIALS, v.222, no., pp.185 - 191
Publisher
ELSEVIER SCIENCE BV
Abstract
The solvothermal synthesis route to mesoporous TiO2 using a vinylphenol polymer structure-directing agent (SDA) was optimized to provide a high yield of bilayer nanosheets. The resultant TiO2 material exhibited a high BET area of 420 m2 g-1 after the removal of SDA. Structural analysis of the nanosheets was carried out using powder X-ray diffraction, high resolution-transmission electron microscopy, Raman spectroscopy and solid-state NMR. The results indicated that the TiO2 material consisted mainly of the bilayer nanosheets with (010) facet-dominant anatase crystal structure. The thickness of the nanosheet was 0.75 nm, corresponding to two unit-cell parameters along the b-axis in the anatase crystal system. More than 10% of the surface Ti atoms were terminated with bridging O-H groups and coordinatively unsaturated Ti atoms, which acted as Brönsted and Lewis acid sites. Accordingly, the anatase nanosheets exhibited catalytic performance in the liquid-phase Friedel-Crafts alkylation of aromatic compounds. © 2015 Elsevier Inc. All rights reserved
URI
https://pr.ibs.re.kr/handle/8788114/2195
ISSN
1387-1811
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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