Effect of water ethanol solvents mixture on textural and gas sensing properties of tin oxide prepared using epoxide-assisted sol-gel process and dried at ambient pressure

被引：23

作者：

Mahadik, D. B. ^{[1
]}

Lee, Yoon Kwang ^{[1
]}

Park, Chang-Sun ^{[1
]}

Chung, Hee-Yoon ^{[1
]}

Hong, Min-Hee ^{[1
]}

Jung, Hae-Noo-Ree ^{[1
]}

Han, Wooje ^{[1
]}

Park, Hyung-Ho ^{[1
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

来源：

SOLID STATE SCIENCES | 2015年 / 50卷

关键词：

Tin oxide aerogel; Ambient pressure drying; Surface area; Gas sensing properties; DOPED SNO2; THIN-FILMS; MONOLITHS; SENSORS; AEROGEL; ROUTE;

D O I：

10.1016/j.solidstatesciences.2015.10.003

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

High-surface-area tin oxide aerogels have been synthesized by an ambient-pressure drying method, using a non-alkoxide tin precursor and a hybrid solegel technique. The tin precursor was dissolved in different volume ratios of mixed water and ethanol solvents, and gelation was attained by means of an epoxide-initiated gelation process. The solvent in the gel was successively replaced with low-surface-tension solvents, and finally the gels were dried at ambient pressure in an oven. It was observed that solvent combinations significantly altered the textural properties of tin oxide aerogels. The solvent exchange process used prior to ambient-pressure drying helped to minimize impurities originating from the tin precursor. The tin oxide aerogels had the maximum specific surface area of 209 m(2)/g and small crystallite size (<6.5 nm) after an annealing treatment at 500 degrees C for 2 h. The sensitivity of a SnO2 sensor to CO gas was found to be strongly affected as the specific surface area of its constituent tin oxide aerogel was increased from 121 m(2)/g to 209 m(2)/g. This study offers evidence of the effects of tin oxide aerogel's specific surface area upon its gas sensing performance. (C) 2015 Elsevier Masson SAS. All rights reserved.

引用

页码：1 / 8

页数：8