Photocatalytic activity of nanocrystalline TiO2(B) synthesized from titanium glycolate complex by hydrothermal method

Kazuhiro YAMAMOTO; Hironori SHIMOITA; Koji TOMITA; Kazumi FUJITA; Makoto KOBAYASHI; Valery PETRYKIN; Masato KAKIHANA

doi:10.2109/jcersj2.117.347

Papers

Photocatalytic activity of nanocrystalline TiO₂(B) synthesized from titanium glycolate complex by hydrothermal method

Kazuhiro YAMAMOTO, Hironori SHIMOITA, Koji TOMITA, Kazumi FUJITA, Makoto KOBAYASHI, Valery PETRYKIN, Masato KAKIHANA

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Keywords: TiO₂(B), Water-soluble titanium complex, Hydrothermal synthesis, Photocatalyst, Titanium dioxide

JOURNAL FREE ACCESS

2009 Volume 117 Issue 1363 Pages 347-350

DOI https://doi.org/10.2109/jcersj2.117.347

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Abstract

The metastable phase of TiO₂(B), one of the polymorphs of titanium dioxide (TiO₂), was prepared by a hydrothermal treatment of a titanium glycolate complex ([Ti₄(C₂H₂O₃)₄(C ₂H₃O₃)₂(O₂)₄O₂]^6-) at 473 K for 1-72 h in the presence of H₂SO₄. Characterization by X-ray diffraction (XRD) and transmission electron microscopy (TEM) revealed that the obtained samples were composed of single phase TiO₂(B) and the particles had plate-like morphology. After post-synthetic hydrothermal crystal growth (PHCG) applied to the as-prepared sample, thicker plate-like shaped particles were obtained. The photocatalytic activities of the samples obtained by the hydrothermal treatment and after the subsequent PHCG were evaluated in terms of methanol decomposition.

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