The humidity-sensitive property of MgO-SBA-15 composites in one-pot synthesis

SENSORS AND ACTUATORS B-CHEMICAL

卷:145

Article

Wang, Rui¹  Liu, Xiangwei¹  He, Yuan¹  Yuan, Qing²  Li, Xiaotian²  Lu, Geyu¹  Zhang, Tong¹ 

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[2] Jilin Univ, Dept Mat Sci & Engn, Changchun 130012, Peoples R China

关键词: MgO-SBA-15;    Humidity sensor;    Complex impedance;    Sensing mechanism;   

DOI  :  10.1016/j.snb.2009.12.025

来源: Elsevier

【 摘 要 】

MgO-SBA-15 has been successfully developed as a kind of humidity-sensitive material. The structure of MgO-SBA-15 materials was characterized by XRD, IR spectroscopy, N-2 adsorption-desorption, TEM and XPS. The study proved that the MgO did not destroy the mesoporous structure of SBA-15 via the characteristic results of XRD and N-2 adsorption-desorption. Researchers built the thick film humidity sensors on the Al2O3 ceramic substrate with two Ag-Pd interdigital electrodes with five fingers. The sensor shows excellent humidity sensitivity from 11% to 95%RH, and it has very good response and recovery property. The response time is about 10 s and the recovery time is about 20s. We found that the mesoporous structure of the sensing materials contributed to the humidity sensitivity. We discussed a possible mechanism based on the humidity sensor produced by MgO-SBA-15. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.

【 授权许可】

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