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Mesoporous Assembly of Layered Titanate with Well-Dispersed Pt Cocatalyst

Title
Mesoporous Assembly of Layered Titanate with Well-Dispersed Pt Cocatalyst
Authors
Jung, Tae SungKim, Tae WooHwang, Seong-Ju
Ewha Authors
황성주
SCOPUS Author ID
황성주scopus
Issue Date
2009
Journal Title
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
ISSN
0253-2964JCR Link
Citation
vol. 30, no. 2, pp. 449 - 453
Keywords
Mesoporous assemblyRestackingSurface expansionLayered titanatePhotocatalysts
Publisher
KOREAN CHEMICAL SOC
Indexed
SCI; SCIE; SCOPUS; KCI WOS
Abstract
A mesoporous assembly of layered titanate with well-dispersed Pt cocatalysts has been synthesized via a restacking of exfoliated titanate nanosheets and a simultaneous adsorption of Pt nanoparticles. According to powder X-ray diffraction analysis, the obtained mesoporous assembly shows amorphous structure corresponding to the disordered stacking of layered titanate crystallites. Field emission-scanning electron microscopy and N(2) adsorption-desorption isotherm measurement clearly demonstrate the formation of mesoporous structure with expanded Surface area due to the house-of-cards type stacking of the titanate crystallites. From high resolution-transmission electron microscopy and elemental mapping analyses, it is found that Pt nanoparticles with the size of similar to 2.5 nm are homogeneously dispersed in the mesoporous assembly of layered titanate. In comparison with the protonated titanate, the present mesoporous assembly of layered titanate exhibits better photocatalytic activity for the photodegradation of organic molecules. This finding underscores that the restacking of exfoliated nanosheets is quite useful not only in creating mesoporous structure but also in improving the photocatalytic activity of titanium oxide.
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자연과학대학 > 화학·나노과학전공 > Journal papers
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