Study on a type of mesoporous silica humidity sensing material

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• 作者：Jinchun Tu^a ; ^{tujingchun@yahoo.com.cn}  ; [Author Vitae] ; Nan Li^b  ; [Author Vitae] ; Wangchang Geng^c  ; [Author Vitae] ; Rui Wang^d  ; [Author Vitae] ; Xiaoyong Lai^b  ; [Author Vitae] ; Yang Cao^a  ; [Author Vitae] ; Tong Zhang^d  ; [Author Vitae] ; Xiaotian Li^b  ; [Author Vitae] ; Shilun Qiu^b  ; [Author Vitae]
• 关键词：Humidity sensor ; Humidity sensitive property ; Mesoporous silica ; Microwave digestion (MWD)
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2012
• 出版时间：20 May, 2012
• 年：2012
• 卷：166-167
• 期：Complete
• 页码：658-664
• 全文大小：1215 K

文摘

SBA-15, SBA-16 and crystal like-SBA-16 were synthesized by a simple chemical method, and the copolymer template was removed by calcination or microwave digestion (MWD) method. They were investigated as humidity sensing materials at room temperature within the relative humidity range of 11-95 % RH. It was found that after MWD treatment, the humidity sensitive property of mesoporous silica have been greatly improved, and the impedance of MWD-crystal like SBA-16 changed by more than three orders of magnitude over the whole humidity range. Further testing proved that it is a promising humidity sensing material and can be widely used. A possible mechanism was also proposed to explain the correlation between material and property.