A Simple, Template-Free Route for the Synthesis of Bicrystalline Mesoporous TiO₂ Materials

Authors: Su, Zhili; Yang, Chun

Source: Journal of Nanoscience and Nanotechnology, Volume 9, Number 11, November 2009 , pp. 6675-6680(6)

Publisher: American Scientific Publishers

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Abstract:

A simple, low-temperature and green template-free synthetic route has been used to prepare mesoporous TiO₂ with anatase and brookite bicrystalline framework. This route combines a quick hydrolysis at ambient temperature and sequent hydrothermal treatment at 80∼180 °C without further calcination. The resultant materials were characterized by XRD, TEM and nitrogen adsorption. It was found that the wormhole-like mesostructure and the bicrystalline framework could be formed in the hydrothermal treatment, and high surface areas of 160∼250 m² · g⁻¹ could be obtained due to the avoidance of calcination at high temperature. The effect of hydrothermal temperature on mesoporosity and crystallinity was also investigated and discussed. The as-prepared TiO₂ samples exhibited higher photocatalytic activities than pure anatase TiO₂ and corresponding calcined samples in the degradation of methyl orange, which can be attributed to the combined effect of composite crystalline phase and high surface area.

Keywords: MESOPOROUS TIO2; BICRYSTALLINE PHASES; SYNTHESIS; PHOTOCATALYSIS

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2009.1333

Publication date: 2009-11-01

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Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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