Effect of Anion on Crystal Form of TiO2 and Their Photocatalytic Performance

doi:10.7517/j.issn.1674-0475.2013.03.003

Abstract

Abstract: SO₄^-2, F^-, Cl^- and PO₄^-3 were selected as anion to investigate the morphology and the crystal form of TiO₂ (named as TiO₂-S、TiO₂-F、TiO₂-Cl and TiO₂-P) prepared with hydrothermal synthesis in this study. Their photoctalytic performance were also investigated. Form SEM photo, TiO₂-S、TiO₂-F、TiO₂-Cl and TiO₂-P present shape of particle, decanedron, acanthosphere, and irregular bulk, respectively. XRD patterns showed that TiO₂-S and TiO₂-F were both anatase structure, TiO₂-Cl was rutile structure, and TiO₂-P was a mixed phase of anatase, rutile and brookite. These were indicated by the UV-Vis diffuse reflectance spectroscopy. XPS spectrum showed that four TiO₂ nanometer materials are affected by the anion doping. The photocatalytic activities of the samples were evaluated by rhodamine B degradation. The results revealed that the order of photocatalytic efficiency was TiO₂-F>TiO₂-S>TiO₂-Cl>TiO₂-P, which indicated that the photocatalytic activity of anatase with {001} facets and F was higher than rutile's and brookite's.

Key words: TiO₂, photocatalytsis, {001} facets, Rhodamine B

CLC Number:

HAN Yan-he, JIANG Jin-hai, JIANG Li, LI Bao-qin, LIU Lu, CHEN Jia-qing, LIANG Cun-zhen. Effect of Anion on Crystal Form of TiO₂ and Their Photocatalytic Performance[J]. Imaging Science and Photochemistry, 2013, 31(3): 186-196.

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Effect of Anion on Crystal Form of TiO₂ and Their Photocatalytic Performance

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