Journal
CHINESE CHEMICAL LETTERS
Volume 26, Issue 8, Pages 1022-1025Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2015.04.029
Keywords
Separated-electrode; Piezoelectric sensor; Iodine adsorption; Zeolitic-imidazolate framework
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Funding
- National Natural Science Foundation of China [21175084, 21275091]
- Opening Fund of Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Hunan Normal University), Ministry of Education [KLCBTCMR2001-01]
- Research Fund for the Doctoral Program of Higher Education of China [20113704110003]
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In this work, a separated-electrode piezoelectric sensor (SEPS), constructed by a naked quartz crystal mounted between two electrodes, is reported for applications in a corrosive gaseous phase. The response of SEPS was measured by an impedance analysis method. It was shown that SEPS has an excellent frequency stability because its quality factor is in the order of 10(5). The SEPS can be operated even with the electrode gap in air larger than 1 cm. Compared with a conventional quartz crystal microbalance, the resonant frequency of the SEPS is independent of the mass change in the electrode. The SEPS was applied to monitor the adsorption of iodine on quartz surface and zeolitic-imidazolate framework-8 (ZIF-8) film as well as in the transfer of iodine between two ZIF-8 films. The SEPS offers the advantages of easy preparation, corrosion-resistant and convenience in combination with mass and optical measurements. (C) 2015 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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