Effects of addition of poly(ethylene glycol) on the formation of anatase nanocrystals in SiO2-TiO2 gel films with hot water treatment

被引：47

作者：

Kotani, Y

Matsuda, A ^{[1
]}

Kogure, T

Tatsumisago, M

Minami, T

机构：

[1] Univ Osaka Prefecture, Grad Sch Engn, Dept Appl Mat Sci, Sakai, Osaka 5998531, Japan

[2] Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Bunkyo Ku, Tokyo 1130033, Japan

来源：

CHEMISTRY OF MATERIALS | 2001年 / 13卷 / 06期

关键词：

D O I：

10.1021/cm001419r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Effects of the addition of poly(ethylene glycol) (PEG) in SiO2-TiO2 gel films on the formation of anatase nanocrystals with hot water treatment were investigated. Anatase nanocrystals were formed in the whole SiO2-TiO2 gel films with the addition of PEG by the! treatment, whereas in the films without PEG the nanocrystals were formed mainly on the surface of the films. PEG in the SiO2-TiO2 films was completely leached out with the hot water treatment in about 1 min. The pores produced by the leaching of PEG probably allow anatase nanocrystals to be formed inside the films. Hydrolysis of Si-O-Ti bonds was presumed to play an important role in the nucleation of anatase nanocrystals in the hot water treatment.

引用

页码：2144 / 2149

页数：6

共 20 条

[1] PREPARATION OF MONOLITHIC SIO2-TIO2 GELS BY CONDENSATION POLYMERIZATION OF SILICIC-ACID AND TITANIUM CHELATES [J].