title: Synthesis of titanium dioxide nanoparticles with mesoporous anatase wall and high photocatalytic activity.
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.
authors.affiliation: Department of Chemistry, Centre of Nanoscience and Nanotechnology Research, Wuhan University, Wuhan 430072, China. typeng@whu.edu.cn
authors.forename: Tianyou
authors.initials: T
authors.lastname: Peng
authors.forename: De
authors.initials: D
authors.lastname: Zhao
authors.forename: Ke
authors.initials: K
authors.lastname: Dai
authors.forename: Wei
authors.initials: W
authors.lastname: Shi
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Hirao