Abstract Polyaniline/Sm2O3 (PANI/Sm2O3) nanocomposite with 5 wt% Sm2O3 was synthesized by in-situ oxidative polymerization of emeraldine base (EB) phase in presence of Sm2O3 microspheres. The synthesized sample was characterized by XRD, FE-SEM, Raman and FT-IR. Characterization data have shown that PANI/Sm2O3 composite was formed by Sm2O3 particles surrounded by a thick coating of polyaniline. The gas-sensing performances of conductometric sensors based on PANI/Sm2O3 were investigated for the first time to detect hydrogen in air at room temperature (30 °C). The experimental results reported here demonstrated the good sensing properties of the composite-based PANI/Sm2O3 sensor in terms of response, fast response/recovery time as well as excellent response repeatability, compared to the pure PANI and Sm2O3. The improved sensing performances were attributed to the formation of p-p heterojunction in PANI/ Sm2O3 composite.

中文翻译：

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用于室温下快速氢检测的 PANI/Sm2O3 纳米复合传感器

摘要 通过在 Sm2O3 微球的存在下原位氧化聚合祖母绿基 (EB) 相，合成了含有 5 wt% Sm2O3 的聚苯胺/Sm2O3 (PANI/Sm2O3) 纳米复合材料。合成的样品通过XRD、FE-SEM、拉曼和FT-IR表征。表征数据表明，PANI/Sm2O3 复合材料是由 Sm2O3 颗粒被厚厚的聚苯胺涂层包围形成的。首次研究了基于 PANI/Sm2O3 的电导传感器的气敏性能，用于在室温 (30 °C) 下检测空气中的氢气。此处报告的实验结果表明，与纯 PANI 和 Sm2O3 相比，基于复合材料的 PANI/Sm2O3 传感器在响应、快速响应/恢复时间以及出色的响应重复性方面具有良好的传感特性。