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자연과학대학
화학·나노과학전공
Journal papers
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An inorganic nanohybrid with high specific surface area: TiO 2-pillared MoS2
Title
An inorganic nanohybrid with high specific surface area: TiO 2-pillared MoS2
Authors
Paek S.-M.
;
Jung H.
;
Park M.
;
Lee J.-K.
;
Choy J.-H.
Ewha Authors
최진호
SCOPUS Author ID
최진호
Issue Date
2005
Journal Title
Chemistry of Materials
ISSN
0897-4756
Citation
Chemistry of Materials vol. 17, no. 13, pp. 3492 - 3498
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
A novel lamellar inorganic-inorganic nanohybrid (TiO2-pillared MoS2) has been successfully synthesized by an exfoliation- reassembling method. According to the X-ray diffraction and cross-sectional transmission electron microscopy analyses, quantum-sized TiO2 nanoparticles with a diameter of 1 nm are homogeneously distributed in the interlayer space of a two-dimensional MoS2 lattice. Such structural regularity of pillars results in a remarkable enhancement of porosity, as confirmed by nitrogen adsorption-desorption isotherms. The Langmuir specific surface area (186 m2 g-1) of the TiO2-pillared MoS2 has been determined to be remarkably larger than that (12 m 2 g-1) of the restacked MoS2. It is, therefore, evident that adequate intercalation of TiO2 nanoparticles into a MoS2 lattice gives rise to a highly porous structure. Ti K-edge extended X-ray absorption fine structure (EXAFS) analyses also indicate that the anatase nanopillars are stabilized in the interlayer space of MoS2 without any significant agglomeration. From Mo K-edge EXAFS studies, it has been found that the highly distorted octahedral structure of the host lattice in the as-prepared nanohybrid changes into a thermodynamically stable trigonal prismatic one upon heat treatment. © 2005 American Chemical Society.
DOI
10.1021/cm0477220
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