Citation: HE Ming-Ming, MO Mao-Song. Preparation, Characterization and Photocatalysis of Core-Shell and Hollow Polyhedral Titanium Dioxide[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(7): 1419-1427. doi: 10.3969/j.issn.1001-4861.2013.00.172 shu

Preparation, Characterization and Photocatalysis of Core-Shell and Hollow Polyhedral Titanium Dioxide

1.
Advanced Electronic Materials Research Institute, General Research Institute of Nonferrous Metals, Beijing 100088, China

Received Date: 9 October 2012
Available Online: 5 February 2013
Fund Project: 国家自然科学基金(No.21271032,50932001)资助项目。 (No.21271032,50932001)

In order to further promote the photocatalytic activity of polyhedral titanium dioxide with special exposed facets, the core-shell and hollow structured polyhedral titanium dioxide were controllably prepared by a facile hydrothermal method. The structure, morphology and photocatalytic property of core-shell and hollow structured TiO₂ were characterized by means of powder X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-Vis absorption spectra measurement, respectively. SEM and TEM observations showed that as-resulting two kinds of TiO₂ have a tunnel-like hollow, polyhedral shell-layer structure with opened (001)/(001) surface planes. The formation of the two kinds of novel structures might be due to the effect of both complexing and weak acid etching. The photodegradation to Methylene Blue of the as-resulting TiO₂ were tested in the presence of peroxide. The results showed that the photocatalytic activity of the resulting two kinds of TiO₂ structures could be promoted even higher with the additive of preoxide, which can be ascribed to their large specific surfaces, and the fact that the·OH provided by peroxide can efficiently separate e^-/h⁺ pairs on the surface of titanium dioxide.
- polyhedron;core-shell structure;hollow structure;titanium dioxide;photocatalytic activity;hydrothermal synthesis
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