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A HUMIDITY SENSOR BASED ON MgO-MCM-41 NANOPOROUS SILICA

卷 20, 册 3, 2017, pp. 217-225
DOI: 10.1615/JPorMedia.v20.i3.30
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摘要

MgO-doped mesoporous silica MCM-41 was prepared by sol-gel technique and characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and x-ray diffraction techniques. It is clear that the MgO did not destroy the mesoporous structure of MCM-41. Different levels of MgO were doped into MCM-41 and investigated as a humidity sensor by screen printing on the alumina substrate with Ag-Pd interdigited electrode at room temperature. Comparison of MgO-MCM-41 with pure MCM-41 shows improved humidity-sensing properties. The optimal mixing ratio was 1 (R = 1), which exhibits excellent humidity sensitivity from 11% to 95% RH (relative humidity), very good response and recovery properties. The investigation of the humidity-sensitive characteristics of MgO-MCM-41 shows that this material is a promising humidity sensor.

对本文的引用
  1. Entezari Akram, Ejeian Mojtaba, Wang Ruzhu, Modifying water sorption properties with polymer additives for atmospheric water harvesting applications, Applied Thermal Engineering, 161, 2019. Crossref

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