Humidity sensing property of Al-doped mesoporous silica

Geng Wangchang, Duan Libing, Zhang Qiuyu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

In order to study the humidity sensing property and sensing mechanism of Al-doped mesoporous silica SBA-15 (Al-SBA-15), Al-SBA-15 was prepared by a simple grind method following a heat-treatment process. Its structure and morphology was characterized by X-ray diffraction (XRD), Infrared (IR), scanning electron microscope (SEM). Humidity sensing response was studied and the results indicated that Al-SBA-15 displayed better sensing property when the frequency was 100 Hz. The impedance of Al-SBA-15 changes three orders of magnitude when relative humidity changes from 11% to 95%. Complex impedance spectra, the corresponding equivalent circuit under different relative humidity are carefully analyzed to explore the humidity sensing mechanism of this material. This material can be used as a promising humidity sensing material.

Original languageEnglish
Title of host publicationApplied Mechanics and Mechanical Engineering III
Pages992-997
Number of pages6
DOIs
StatePublished - 2013
Event2012 3rd International Conference on Applied Mechanics and Mechanical Engineering, ICAMME 2012 - Macau, China
Duration: 14 Nov 201215 Nov 2012

Publication series

NameApplied Mechanics and Materials
Volume249-250
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Conference

Conference2012 3rd International Conference on Applied Mechanics and Mechanical Engineering, ICAMME 2012
Country/TerritoryChina
CityMacau
Period14/11/1215/11/12

Keywords

  • Complex impedance spectra
  • Humidity sensing
  • Mesoporous silica

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