Room Temperature Ammonia Gas Sensor Based on Polyaniline-TiO2 Nanocomposite
Room Temperature Ammonia Gas Sensor Based on Polyaniline-TiO2 Nanocomposite
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DOI：
10.1109/jsen.2011.2160392
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发表时间：
2011-12-01
影响因子：
4.3
通讯作者：
Patil, V. B.
中科院分区：
文献类型：
--
作者：
Pawar, S. G.;Chougule, M. A.;Patil, V. B.
在目前的工作中，我们报告的性能的室温氨气传感器的聚苯胺-二氧化钛（PANi-TiO 2）纳米复合材料的基础上。采用旋涂法在玻璃基底上制备了纳米复合材料。研究了PANi-TiO_2（0%~ 50%）纳米复合薄膜的结构、表面形貌、紫外-可见光谱和各种气体响应。XRD分析表明，纳米TiO 2的形成，而聚苯胺表现出无定形性质。PANi-TiO 2纳米复合薄膜的扫描电子显微镜形貌分析表明，TiO 2纳米粒子在PANi基体中均匀分布。与纯PANi相比，PANi-TiO 2复合膜的FTIR和UV-Vis光谱中的吸收峰向更高的波数移动。所观察到的位移归因于TiO 2颗粒和PANi分子链之间的相互作用。气敏性能测试表明，该传感器在室温下对氨气（NH3）具有选择性。
In the present work, we report on the performance of room temperature ammonia gas sensor based on polyaniline-titanium dioxide (PANi-TiO2) nanocomposite. The nanocomposite was fabricated using the spin coating method on glass substrates. PANi-TiO2 (0%-50%) nanocomposite films were characterized for their structural as well as surface morphologies, UV-Vis and various gas responses were studied. The XRD analysis showed formation of nanocrystalline TiO2, while polyaniline exhibited amorphous nature. Morphological analysis using scanning electron microscopy of PANi-TiO2 nanocomposite film revealed uniform distribution of TiO2 nanoparticles in PANi matrix. The absorption peaks in FTIR and UV-Vis spectra of PANi-TiO2 composite film were found to shift to a higher wave number as compared to those observed in pure PANi. The observed shifts were attributed to the interaction between the TiO2 particle and PANi molecular chains. The gas sensing properties showed the sensor exhibit selectivity to ammonia (NH3) at room temperature.