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J Phys Chem B. 2005 Mar 24;109(11):4947-52.

Synthesis of titanium dioxide nanoparticles with mesoporous anatase wall and high photocatalytic activity.

Author information

1
Department of Chemistry, Centre of Nanoscience and Nanotechnology Research, Wuhan University, Wuhan 430072, China. typeng@whu.edu.cn

Abstract

Mesoporous titanium dioxide nanosized powder with high specific surface area and anatase wall was synthesized via hydrothermal process by using cetyltrimethylammonium bromide (CTAB) as surfactant-directing agent and pore-forming agent. The resulting materials were characterized by XRD, nitrogen adsorption, FESEM, TEM, and FT-IR spectroscopy. The as-synthesized mesoporous TiO2 nanoparticles have mean diameter of 17.6 nm with mean pore size of 2.1 nm. The specific surface area of the as-synthesized mesoporous nanosized TiO2 exceeded 430 m2/g and that of the samples after calcination at 600 degrees C still have 221.9 m2/g. The mesoporous TiO2 nanoparticles show significant activities on the oxidation of Rhodamine B (RB). The large surface area, small crystalline size, and well-crystallized anatase mesostructure can explain the high photocatalytic activity of mesoporous TiO2 nanoparticles calcined at 400 degrees C.

PMID:
16863152
DOI:
10.1021/jp044771r

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