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Low Temperature Synthesis and Characterization of Porous Anatase TiO2 Nanoparticles

✍ Scribed by Naofumi Uekawa; Jyunichi Kajiwara; Kazuyuki Kakegawa; Yoshinori Sasaki

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
238 KB
Volume
250
Category
Article
ISSN
0021-9797

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✦ Synopsis

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.

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