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首页> 外文期刊>RSC Advances >Ammonia/amine electronic gas sensors based on hybrid polyaniline-TiO2 nanocomposites. The effects of titania and the surface active doping acid
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Ammonia/amine electronic gas sensors based on hybrid polyaniline-TiO2 nanocomposites. The effects of titania and the surface active doping acid

机译：基于杂化聚苯胺-TiO2纳米复合材料的氨/胺电子气体传感器。二氧化钛和表面活性掺杂酸的作用

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摘要

New ammonia and amine sensing materials based on hybrid polyaniline/titanium dioxide nanocomposites were synthesized by a one-pot chemical polymerization. Particular attention was paid to the influence of TiO2 nanoparticles and the surface active dopants on the structure-property relationship of the nanocomposites in terms of their morphology, composition, electrical and sensing properties. Dodecylbenzenesulfonic (DBSA) and lauryl sulfuric (LSA) acids were used as polyaniline dopants. The nanocomposites sensing properties were evaluated at different humidity levels when exposed to ammonia, methyl-and trimethylamine (0.2 ppm to 1 ppm). The materials demonstrated strong responses and high sensitivity to the gases with a quantification limit of 20 ppb for ammonia. The sensors are reversible and have short response times. However, the response magnitude depends on the dopant nature. The results were interpreted in terms of basicity and size of the analyte gas molecules.
机译：通过一锅化学聚合合成了基于杂化聚苯胺/二氧化钛纳米复合材料的新型氨和胺感测材料。特别关注了TiO2纳米颗粒和表面活性掺杂剂对纳米复合材料的结构，性质，形态，组成，电学和传感性能的影响。十二烷基苯磺酸（DBSA）和月桂基硫酸（LSA）酸用作聚苯胺掺杂剂。当暴露于氨，甲基和三甲胺（0.2 ppm至1 ppm）下时，在不同湿度下评估了纳米复合材料的传感性能。该材料对气体表现出强大的响应性和高灵敏度，氨的定量限为20 ppb。传感器是可逆的，响应时间短。但是，响应幅度取决于掺杂剂的性质。根据分析物气体分子的碱性和大小来解释结果。

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