Preparation of silica-gel film with pH indicators by the sol-gel method

被引：27

作者：

Kowada, Y

Ozeki, T

Minami, T

机构：

[1] Hyogo Univ Teachers Educ, Yashiro, Hyogo 6731494, Japan

[2] Osaka Prefecture Univ, Osaka 5998531, Japan

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2005年 / 33卷 / 02期

关键词：

sol-gel method; optical pH sensors; organic-inorganic hybrid materials;

D O I：

10.1007/s10971-005-5612-7

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Gel films with various pH indicators were prepared by the sol-gel method without catalysts. The obtained gel films showed good response for various pH solutions as optical pH sensors and no leaching of the indicators was observed. The feature of absorption spectra of the indicators in the gel films was almost the same as that in the aqueous solutions. pKa of the indicators in the gel films was shifted with the increase of the TMOS content in the starting solutions. These results suggest that the pH indicators in the gel films were trapped in similar environment as in the solutions.

引用

页码：175 / 185

页数：11

共 9 条

[1] Hysteresis in optical sensing and its impact on the analytical error of a calibration-free acid sensor [J].