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Sensors 2015, 15(2), 3789-3800; doi:10.3390/s150203789

SnO2 Highly Sensitive CO Gas Sensor Based on Quasi-Molecular-Imprinting Mechanism Design

Institute of Nanoscience and Nanotechnology, Department of Physical Science and Technology, Central China Normal University, Wuhan 430079, China
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Received: 25 December 2014 / Revised: 4 January 2015 / Accepted: 2 February 2015 / Published: 5 February 2015
(This article belongs to the Section Chemical Sensors)
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Abstract

Response of highly sensitive SnO2 semiconductor carbon monoxide (CO) gas sensors based on target gas CO quasi-molecular-imprinting mechanism design is investigated with gas concentrations varied from 50 to 3000 ppm. SnO2 nanoparticles prepared via hydrothermal method and gas sensor film devices SC (exposed to the target gas CO for 12 h after the suspension coating of SnO2 film to be fully dried, design of quasi-molecular-imprinting mechanism, the experiment group) and SA (exposed to air after the suspension coating of SnO2 film to be fully dried, the comparison group) made from SnO2 nanoparticles are all characterized by XRD, SEM and BET surface area techniques, respectively. The gas response experimental results reveal that the sensor SC demonstrates quicker response and higher sensitivity than the sensor SA does. The results suggest that in addition to the transformation of gas sensor materials, surface area, and porous membrane devices, the Molecular Imprinting Theory is proved to be another way to promote the performance of gas sensors. View Full-Text
Keywords: SnO2 nanomaterial; molecular imprinting mechanism; CO gas sensor; high sensitivity SnO2 nanomaterial; molecular imprinting mechanism; CO gas sensor; high sensitivity
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. (CC BY 4.0).

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MDPI and ACS Style

Li, C.; Lv, M.; Zuo, J.; Huang, X. SnO2 Highly Sensitive CO Gas Sensor Based on Quasi-Molecular-Imprinting Mechanism Design. Sensors 2015, 15, 3789-3800.

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