Functionalized nanoporous TiO2 fibers on quartz crystal microbalance platform for formaldehyde sensor
Functionalized nanoporous TiO2 fibers on quartz crystal microbalance platform for formaldehyde sensor
复制标题
石英晶体微天平平台上的功能化纳米多孔 TiO2 纤维用于甲醛传感器
DOI：
10.1016/j.snb.2012.05.050
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发表时间：
2012-08
期刊：
影响因子：
--
通讯作者：
Salem S. Al-Deyab
中科院分区：
文献类型：
--
作者：
Jinyou Lin;丁彬;Jianyong Yu;Salem S. Al-Deyab
本文介绍了一种新型有机-无机混合传感涂层的石英晶体微平衡传感器，通过分析其共振频率信号来检测甲醛。采用溶胶-凝胶型四异丙醇钛(TIP)/聚苯乙烯（PS）复合溶液经煅烧后静电纺丝制备了具有高比表面积（68.72m2/g）的纳米多孔二氧化钛（TiO2）纤维。将乙二醇（EG）分散的tio2纳米纤维滴铸在QCM电极上，然后将传感聚亚胺（PEI）功能化在纤维上。覆盖PEI层的纳米多孔tio2纤维作为高灵敏度的传感接口，在暴露于甲醛蒸气时为体重变化提供输出信号。所研制的甲醛选择性传感器在室温下具有响应快、检出限低（1ppm）的特点。这是因为静电纺纳米多孔tio2纤维的高比表面积和甲醛分子与PEI的伯胺基之间的高效亲核加成反应。我们的新合成方法有望成为在QCM上制造用于气体传感和化学分析的有机-无机混合纳米结构的有力方法。
This paper describes the detection of formaldehyde through analyses of the resonance frequency signal from quartz crystal microbalance (QCM) sensors coated with a novel organic–inorganic hybrid sensing coating. Nanoporous titanium dioxide (TiO2) fibers with high Brunauer–Emmett–Teller (BET) surface area (68.72m2/g) were fabricated by electrospinning a sol–gel titanium tetraisopropoxide (TIP)/polystyrene (PS) composite solution and following calcination process. Ethylene glycol (EG) dispersed TiO2nanofibers were drop casted onto the electrode of QCM, followed by the functionalization of the sensing polyethyleneimine (PEI) on the fibers. The nanoporous TiO2fibers covered with PEI layers worked as a highly sensitive sensing interface to provide output signal for weight changes during exposure to formaldehyde vapor. The developed formaldehyde-selective sensors exhibited rapid response and low detection limit (1ppm) at room temperature. This is because the high specific surface area of the electrospun nanoporous TiO2fibers and efficient nucleophilic addition reaction between formaldehyde molecules and primary amine groups of PEI. Our new synthetic methodology promises to be a powerful approach to fabricating hybrid organic–inorganic nanostructures on QCM for gas sensing and chemical analysis.
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影响因子：
17.4
作者：
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通讯作者：
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影响因子：
14
作者：
Li, Bingyun;Jiang, Bingbing;Boyce, Brandon M.;Lindsey, Brock A.
通讯作者：
Lindsey, Brock A.
影响因子：
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作者：
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通讯作者：
Lam, Kit S.
影响因子：
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作者：
Chen, T.;Liu, Q. J.;Wang, Y. D.
通讯作者：
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纳米纤维聚乙烯亚胺膜作为石英晶体微天平甲醛传感器的敏感涂层
影响因子：
8.4
作者：
Wang, Xianfeng;Ding, Bin;Sun, Gang
通讯作者：
Sun, Gang