Graphene/graphite/molecularly imprinted polymer nanocomposite as the highly selective gas sensor for nitrobenzene vapor recognition
Graphene/graphite/molecularly imprinted polymer nanocomposite as the highly selective gas sensor for nitrobenzene vapor recognition
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DOI：
10.1016/j.jece.2014.07.007
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发表时间：
2014-09-01
影响因子：
7.7
通讯作者：
Hamedsoltani, Leyla
中科院分区：
文献类型：
--
作者：
Alizadeh, Taher;Hamedsoltani, Leyla
介绍了一种用于硝基苯气体检测的新型石墨烯基电阻式气体传感器。以甲基丙烯酸和乙烯基苯为功能单体，合成了含有与硝基苯分子相容空穴的分子印迹聚合物。将印迹聚合物颗粒与石墨烯混合制成纳米复合化学电阻气敏传感器。研究发现，在纳米复合材料中，石墨和石墨烯的存在对于实现MIP和非印迹聚合物(NIP)传感器之间的适当区别是必要的。结果表明，聚甲基丙烯酸甲酯的加入使纳米复合材料具有更好的物理耐久性、更高的选择性和更高的耐湿性。采用中心复合试验设计对传感器影响参数进行优化。该传感器的响应是可逆的，3次测定的相对标准误差为3.5%。该传感器在0.50-60.0ppm浓度范围内具有良好的线性响应。检出限为百万分之零点二(S/N)。(C)2014爱思唯尔有限公司。保留所有权利。
A novel graphene-based chemiresistor gas sensor was introduced for nitrobenzene vapor detection. A molecularly imprinted polymer (MIP) containing the cavities compatible with nitrobenzene molecules was synthesized using methacrylic acid and vinyl benzene as the functional monomers. The imprinted polymeric particles were mixed with graphene to produce a nanocomposite chemiresistor gas sensor. The presence of graphite alongside graphene in the nanocomposite was found to be necessary to achieve a proper difference between the MIP and non-imprinted polymer (NIP)-based sensors. It was found that the addition of poly(methyl methacrylate) in the nanocomposite composition led to better physical durability, enhanced selectivity and higher resistance against humidity effect. Central composite experimental design was utilized to optimize the sensor influencing parameters. The response of the prepared sensor was reversible and a relative standard error equal to 3.5% was obtained for 3 separate determinations. The sensor showed linear response in the concentration range of 0.50-60.0 ppm. The detection limit was calculated to be 0.2 parts per million (S/N). (C) 2014 Elsevier Ltd. All rights reserved.