Preparation of Hierarchical Mesoporous TiO2 Nanosheet Using China Rose Petal as Template

doi:10.3969/j.issn.0251-0790.2012.03.002

Abstract

Abstract:

Hierarchical mesoporous TiO₂ nanosheets were prepared using China rose petal as biotemplate through facile infiltration and thermal decomposition. For characterization of texture, X-ray diffraction spectroscopy(XRD), field emission scanning electron microscopy(FESEM), transmission electron microscopy(TEM), UV-Vis diffuse reflectance spectra(UV-Vis/DRS) and nitrogen adsorption-desorption measurements were adopted. The results demonstrate that the biomorphic structure of anatase TiO₂ nanosheets with the thickness of ca. 4 nm is obtained. There exist mesopores with pore size of about 4 nm on the surface of the TiO₂ nanosheets. Hierarchical mesoporous TiO₂ nanosheets exhibit a clear red shift(20 nm) comparing with Degussa P25, which could be excited by visible irradiation and enhance the visible activity. Hierarchical mesoporous TiO₂ nanosheets display the superior photocatalytic activity for the degradation of methylene blue under sun-light irradiation, with a which degradation rate as high as 98%.

Key words: Biotemplate, Titania, Biomorphic preparation, Photocatalysis

CLC Number:

O611.4

TrendMD:

ZHAO Xiao-Bing, WANG Fang, QIAN Jun-Chao. Preparation of Hierarchical Mesoporous TiO₂ Nanosheet Using China Rose Petal as Template[J]. Chem. J. Chinese Universities, 2012, 33(03): 442.

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Preparation of Hierarchical Mesoporous TiO₂ Nanosheet Using China Rose Petal as Template

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