Fabrication of highly sensitive gas sensor based on Au functionalized WO3 composite nanofibers by electrospinning
Fabrication of highly sensitive gas sensor based on Au functionalized WO3 composite nanofibers by electrospinning
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DOI：
10.1016/j.snb.2015.05.121
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发表时间：
2015-12
影响因子：
8.4
通讯作者：
Xiaojiao Yang;V. Salles;Y. V. Kaneti;Minsu Liu;M. Maillard;C. Journet;Xuchuan Jiang;A. Brioude
中科院分区：
文献类型：
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作者：
Xiaojiao Yang;V. Salles;Y. V. Kaneti;Minsu Liu;M. Maillard;C. Journet;Xuchuan Jiang;A. Brioude
以金(Au)功能化氧化钨(WO_3)复合纳米纤维为基材，采用电纺法制备了一种高灵敏度、高选择性的气敏材料。以钨前驱体偏钨酸铵(AMT)和聚乙烯醇(PVA)溶液为原料，经两步退火处理，制得了Au纳米颗粒(NPs)修饰WO_3复合纳米纤维。用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、高分辨电子显微镜(HRTEM)和电感耦合等离子体发射光谱(ICPOES)等技术对复合纳米纤维的结构和化学组成进行了表征。研究了不同Au含量(0.01M和0.1M)的WO_3-Au复合催化剂对挥发性有机化合物(如正丁醇)的气敏性能。讨论了Au含量和工作温度的影响，以优化WO_3-Au复合传感器的灵敏度、动态响应-恢复行为和效率。
A highly sensitive and selective gas-sensing material based on gold (Au)-functionalized tungsten oxide (WO3) composite nanofibers (NFs) has been fabricated under mild conditions by electrospinning (ES). Au nanoparticles (NPs)-decorated WO3composite NFs were obtained by ES of the tungsten precursor (ammonium metatungstate hydrate) (AMT) and polyvinyl alcohol (PVA) solution followed by a two-step annealing treatment. The chemical and structural characterizations of the resulting composite nanofibers have been performed with various techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM) and inductively coupled plasma optical emission spectrometry (ICP-OES). The gas-sensing properties of the WO3–Au composite NFs with different Au contents (0.01 M and 0.1 M) toward volatile organic compounds (VOCs) (such asn-butanol) have been studied. A discussion concerning the role of Au content and the operating temperature is given to optimize the sensitivity, the dynamic response–recovery behaviors and consequently the efficiency of the WO3–Au composite sensor.