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Sensors 2013, 13(3), 3765-3775; doi:10.3390/s130303765
Article

A Dibutyl Phthalate Sensor Based on a Nanofiber Polyaniline Coated Quartz Crystal Monitor

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Received: 1 February 2013; in revised form: 27 February 2013 / Accepted: 8 March 2013 / Published: 18 March 2013
(This article belongs to the Section Physical Sensors)
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Abstract: Dibutyl phthalate (DBP) is a commonly used plasticizer and additive to adhesives, printing inks and nail polishes. Because it has been found to be a powerful reproductive and developmental toxicant, a sensor to monitor DBP in some working spaces and the environment is required. In this work polyaniline nanofibers were deposited on the electrode of a quartz crystal oscillator to form a Quartz Crystal Microbalance gas sensor. The coated quartz crystal and a non-coated quartz crystal were mounted in a sealed chamber, and their frequency difference was monitored. When DBP vapor was injected into the chamber, gas adsorption decreased the frequency of the coated quartz crystal oscillator and thereby caused an increase in the frequency difference between the two crystals. The change of the frequency difference was recorded as the sensor response. The sensor was extremely sensitive to DBP and could be easily recovered by N2 purging. A low measurement limit of 20 ppb was achieved. The morphologies of the polyaniline films prepared by different approaches have been studied by SEM and BET. How the nanofiber-structure can improve the sensitivity and stability is discussed, while its selectivity and long-term stability were investigated.
Keywords: QCM; gas sensor; dibutyl phthalate; nanofiber; polyaniline QCM; gas sensor; dibutyl phthalate; nanofiber; polyaniline
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Wang, Y.; Ding, P.; Hu, R.; Zhang, J.; Ma, X.; Luo, Z.; Li, G. A Dibutyl Phthalate Sensor Based on a Nanofiber Polyaniline Coated Quartz Crystal Monitor. Sensors 2013, 13, 3765-3775.

AMA Style

Wang Y, Ding P, Hu R, Zhang J, Ma X, Luo Z, Li G. A Dibutyl Phthalate Sensor Based on a Nanofiber Polyaniline Coated Quartz Crystal Monitor. Sensors. 2013; 13(3):3765-3775.

Chicago/Turabian Style

Wang, You; Ding, Pengfei; Hu, Ruifen; Zhang, Jianming; Ma, Xingfa; Luo, Zhiyuan; Li, Guang. 2013. "A Dibutyl Phthalate Sensor Based on a Nanofiber Polyaniline Coated Quartz Crystal Monitor." Sensors 13, no. 3: 3765-3775.


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