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Humidity sensitive property of Li-doped mesoporous silica SBA-15

被引：79
作者：
Geng, Wangchang
Wang, Rui
Li, Xiaotian [1 ]
Zou, Yongcun
Zhang, Tong
Tu, Jinchun
He, Yuan
Li, Nan
机构：
[1] Jilin Univ, Dept Mat Sci & Engn, Changchun 130012, Peoples R China
[2] Jilin Univ, Dept Elect Engn, Changchun 130012, Peoples R China
[3] Jilin Univ, Dept Chem, State Key Lab Inorgan Synthesis & Preparat Chem, Changchun 130012, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2007年 / 127卷 / 02期
基金：
美国国家科学基金会;
关键词：
mesoporous silica; SBA-15; humidity sensitivity; Li doped; sensors;
D O I：
10.1016/j.snb.2007.04.021
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Mesoporous silica SBA-15 was synthesized by a sol-gel method, and different level of LiCl was doped into SBA-15 by heat-treating process at 550 degrees C to form a series of samples. These samples and pure SBA-15 were investigated as humidity sensor materials at room temperature within the relative humidity range of 11-95%. It was found that after the doping of LiCl, the humidity sensitivity has been greatly improved, the impedance changed by more than three orders of magnitude over the whole humidity range. This was related to the hydrophilic property of the Li+, and a possible mechanism was provided to explain the humidity sensitive properties. (c) 2007 Elsevier B.V. All rights reserved.
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页码：323 / 329
页数：7
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