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首页> 外文会议>International Conference on "Multidimensional Role of Basic Science in Advanced Technology" >Facile Synthesis of Polyaniline- Silver NanoComposite Through Chemical Route For Gas Sensing
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Facile Synthesis of Polyaniline- Silver NanoComposite Through Chemical Route For Gas Sensing

机译：通过化学途径将聚苯胺 - 银纳米复合物合成气体传感

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In this paper, the synthesis of polyaniline-silver composites bysimple and low-cost 'dip and dry' process followed by successive ionic layer adsorption and reaction (SILAR) method was studied. Polyaniline-silver composites were produced at room temperature by using ammonium persulphate as an oxidant agent in presence of silver nitrate (AgNO3). Field Emission Scanning Electron Microscopy (FESEM), X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) techniques were used to characterize the synthesized product. FESEM results showed the core shell shape of composites that the layer of polyaniline covered the silver particles. XRD results showed the high crystalline behaviour of the polyaniline- silver composites due to presence of silver. FTIR results also showed the successfully synthesis of the composite. Here the sensitivity of polyaniline- silver composite (average size of nanocomposite ~ 170 nm) towards ammonia gas has been investigated. For 100 ppm ammonia, the sensitivity of the composite increased to 52% from a mere 7% value for pure polyaniline. The polyaniline- silver composite even showed a response time as short as 15 seconds, at room temperature. The silver nanoparticle act as catalyst in the nanocomposite. The stability and sensitivity at different concentrations and selectivity for ammonia gas were also investigated.
机译：在本文中，聚苯胺 - 银复合物的bysimple和低成本的“浸泡和干燥”的过程合成，随后连续离子层吸附和反应（SILAR）方法进行了研究。聚苯胺 - 银复合物通过使用过硫酸铵作为在硝酸银（硝酸银）的存在下用氧化剂在室温下制备。场发射扫描电子显微镜（FESEM），变换的X射线衍射（XRD）和傅立叶红外光谱（FTIR）技术用于表征合成的产物。 FESEM结果表明复合材料聚苯胺的层覆盖的银颗粒的芯壳状。 XRD结果表明，聚苯胺复合银的高结晶行为由于银的存在。 FTIR结果还表明了成功地合成所述复合材料。这里聚苯胺银复合物（纳米复合〜170纳米的平均尺寸）朝向氨气的灵敏度进行了研究。为100ppm的氨，所述复合材料的灵敏度从纯聚苯胺只有7％的值提高到52％。的聚苯胺银复合物甚至呈响应时间尽可能短，15秒，在室温下。银纳米粒子用作所述纳米复合材料的催化剂。以不同的浓度和氨的气体选择性的稳定性和灵敏度进行了研究。

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