TY - JOUR
T1 - Synthesis of visible-light-active nanosize rutile titania photocatalyst by low temperature dissolution-reprecipitation process
AU - Yin, Shu
AU - Hasegawa, Hitoshi
AU - Maeda, Daisaku
AU - Ishitsuka, Masayuki
AU - Sato, Tsugio
N1 - Funding Information:
This work was partly supported by a grant in aid for Scientific Research, No. 14750660, from the Ministry of Education, Science and Culture.
PY - 2004/4/15
Y1 - 2004/4/15
N2 - Titania nanocrystals were prepared by a "low temperature dissolution-reprecipitation process" (LTDRP) in liquid media. The crystallization of amorphous precursor could proceed at low temperature around room temperature, which was much lower than those of conventional calcination and hydrothermal reactions. The thermodynamically stable rutile formed at low temperature below 70 °C, while the metastable anatase formed at higher temperature. The phase composition, microstructure, morphology, and specific surface area of titania changed significantly depending on the reprecipitation temperatures. Needle-like rutile titania and spherical anatase titania crystals with high specific surface areas were prepared. Well-crystallized needle-like nanosize rutile crystals possessed higher photocatalytic activities than those of anatase crystals under visible light irradiation of wavelength >400 and/or >510 nm.
AB - Titania nanocrystals were prepared by a "low temperature dissolution-reprecipitation process" (LTDRP) in liquid media. The crystallization of amorphous precursor could proceed at low temperature around room temperature, which was much lower than those of conventional calcination and hydrothermal reactions. The thermodynamically stable rutile formed at low temperature below 70 °C, while the metastable anatase formed at higher temperature. The phase composition, microstructure, morphology, and specific surface area of titania changed significantly depending on the reprecipitation temperatures. Needle-like rutile titania and spherical anatase titania crystals with high specific surface areas were prepared. Well-crystallized needle-like nanosize rutile crystals possessed higher photocatalytic activities than those of anatase crystals under visible light irradiation of wavelength >400 and/or >510 nm.
KW - Hydrogen evolution
KW - Low temperature dissolution-reprecipitation process
KW - Nanosize rutile titania
KW - Nitrogen monoxide destruction
KW - Visible-light-active photocatalyst
UR - http://www.scopus.com/inward/record.url?scp=1342307465&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1342307465&partnerID=8YFLogxK
U2 - 10.1016/S1010-6030(03)00289-2
DO - 10.1016/S1010-6030(03)00289-2
M3 - Article
AN - SCOPUS:1342307465
VL - 163
SP - 1
EP - 8
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
IS - 1-2
ER -