title: Low temperature synthesis and characterization of porous anatase TiO2 nanoparticles.
abstract: An ethanol solution of Ti-peroxy compounds was prepared from the ethanol solution of titanium isopropoxide (Ti(O-iPr)4) and H2O2. Heating of the ethanol solution of the Ti-peroxy compounds at 348 K formed a Ti-peroxy gel, and heat treatment of the gel at 348 K for more than 6 h formed gels that consisted of anatase nanoparticles. The diameter of the anatase nanoparticles increased from 9 to 15 nm as the heating time increased from 6 to 48 h. According to the results of the N2 adsorption measurement, the anatase nanoparticles had micropores, and the specific surface area (SBET) was in the range of 254 to 438 m2/g. The particle size, lattice strain, specific surface area, and photocatalytic activity of the anatase nanoparticles can be regulated by the heating time of the Ti-peroxy gel at 348 K.
authors.affiliation: Department of Materials Technology, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, 263-8522, Japan. uekawa@galaxy.tc.chiba-u.ac.jp
authors.forename: Naofumi
authors.initials: N
authors.lastname: Uekawa
authors.forename: Jyunichi
authors.initials: J
authors.lastname: Kajiwara
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Kakegawa
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Sasaki