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| Monitoring iodine adsorption onto zeolitic-imidazolate framework-8 film using a separated-electrode piezoelectric sensor |
| Da-Zhong Shen, Ting-Ting Cai, Xi-Lei Zhu, Xiao-Long Ma, Ling-Qiang Kong, Qi Kang |
| The Key Lab in Molecular and Nano-materials Probes of the Ministry of Education of China, College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China |
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Abstract 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 105. 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.
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Received: 05 January 2015
Published: 29 April 2015
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| Fund:The authors gratefully acknowledge financial support by National Natural Science Foundation of China (Nos. 21175084, 21275091), theOpening Fund ofKey Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Hunan Normal University), Ministry of Education (No. KLCBTCMR2001-01) and Research Fund for the Doctoral Program of Higher Education of China (No. 20113704110003). |
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Corresponding Authors:
Qi Kang
E-mail: qikang@sdu.edu.cn
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