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首页> 外文期刊>Macromolecular symposia >Conducting Poly(N-propylaniline) Nanoparticles for Hydrogen Sulfide Gas Detection
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Conducting Poly(N-propylaniline) Nanoparticles for Hydrogen Sulfide Gas Detection

机译：导电聚（N-丙基苯胺）纳米粒子用于硫化氢气体检测

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摘要

We report a sensitive, selective, and fast responding room temperature chemiresistive sensor for hydrogen sulfide detection and quantification using poly(N-propylaniline) (PNPA). This sensor shows an excellent wide range of detection with very good selectivity and reproducibility. Organic acid and HCl doped poly(N-propylaniline) PNPA were synthesized by chemical oxidative polymerization. It was found that the polymer synthesized using DL-(±)-Tartaric acid is formed in conducting emeraldine oxidation state and displayed higher doping level and crystallinity than HCl doped poly-(N-propylaniline). The polymers were characterized by techniques such as UV-Visible and FTIR spectroscopy, XRD, SEM and conductivity measurement. The synthesized materials were tested as sensors for acids, bases and organic vapors etc. and categorized. Comparison of the responses of these two polymers reveals that the tartaric acid doped polymer exhibits higher sensitivity and reversibility. The result is discussed with reference to HCl doped and DL-(±)-Tartaric acid doped poly(N-propylaniline). The poly(N-propyl)aniline pellets were used as sensor by measuring change in resistance before and after exposure to analyte gas. On exposure to H2S gas (10 to 1000 ppm in air) at room temperature, it was found that the PNPA film resistance increases, while that of the PNPA pellet decreases from the respective unexposed value. These changes on removal of H2S gas are reversible in nature, and the polymer PNPA showed good sensitivity with relatively faster response/recovery time. The XRD of PNPA is found to exhibit partial crystallinity as observed from the presence of several peaks at 2θ values of 18 to 41°. The SEM figure indicates that the PNPA/TA consist of coral-like granular particulates with diameter in the range of 50 to 100 nm.
机译：我们报告了一种灵敏，选择性和快速响应的室温化学传感器，用于使用聚（N-丙基苯胺）（PNPA）进行硫化氢的检测和定量。该传感器具有出色的选择性和重现性，显示了出色的检测范围。通过化学氧化聚合反应合成了有机酸和HCl掺杂的聚（N-丙基苯胺）PNPA。发现使用DL-（±）-酒石酸合成的聚合物以翡翠氧化态形成，并且比HCl掺杂的聚（N-丙基苯胺）具有更高的掺杂水平和结晶度。通过诸如UV-可见光谱和FTIR光谱，XRD，SEM和电导率测量的技术来表征聚合物。测试了合成材料作为酸，碱和有机蒸气等的传感器并进行了分类。两种聚合物的响应的比较表明，酒石酸掺杂的聚合物表现出更高的灵敏度和可逆性。参照HCl掺杂和DL-（±）-酒石酸掺杂的聚（N-丙基苯胺）讨论了结果。通过测量暴露于分析物气体之前和之后的电阻变化，将聚（N-丙基）苯胺颗粒用作传感器。发现在室温下暴露于H2S气体（空气中为10至1000 ppm）时，PNPA膜电阻从相应的未暴露值降低，而PNPA颗粒的电阻则从相应的未暴露值降低。去除H2S气体的这些变化本质上是可逆的，并且聚合物PNPA表现出良好的灵敏度，并且响应/恢复时间相对较快。从在18至41°的2θ值处存在多个峰观察到，发现PNPA的XRD显示出部分结晶性。 SEM图表明PNPA / TA由直径在50至100 nm范围内的珊瑚状颗粒组成。

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