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Simple chemical solution coating and gas sensing properties of α-Fe_2O_3/chrysotile fibrous composites

机译：α-Fe_2O_3/温石棉纤维复合材料的简单化学溶液涂覆和气敏性能

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摘要

α-Fe_2O_3/chrysotile fibrous composites were prepared by a simple chemical solution coating method for the gas sensitivity improvement of α-Fe_2O_3. X-ray diffraction (XRD) and atomic force microscope (AFM) analyses indicate that corundum-type α-Fe_2O_3 nanoparticles with a mean particle size ~20 nm are dense and well-proportioned on the surface of chrysotile fibers due to the mechanism that positively charged Fe(OH)3 particles can be adsorbed onto the negatively charged chrysotile fibers in acidic liquids. The fabricated sensor devices were characterized for their electrical and gas sensing properties, it is found that the sensitivities of α-Fe_2O_3/chrysotile fibrous composites to H_2 and CH_4 all increase by -35% than those of the single α-Fe_2O_3 nanoparticles. Such simple coating treatment is an effective way in improving the continuities and gas sensing properties of nanogranular thick films.
机译：采用简单的化学溶液涂覆法制备α-Fe_2O_3/温石棉纤维复合材料，以提高α-Fe_2O_3的气体敏感性。 X射线衍射（XRD）和原子力显微镜（AFM）分析表明，平均温度约20 nm的刚玉型α-Fe_2O_3纳米颗粒在温石棉纤维表面上致密且分布均匀带电的Fe（OH）3颗粒可在酸性液体中吸附到带负电的温石棉纤维上。对所制备的传感器装置的电和气敏特性进行了表征，发现α-Fe_2O_3/温石棉纤维复合材料对H_2和CH_4的敏感性均比单个α-Fe_2O_3纳米粒子的敏感性提高了-35％。这种简单的涂层处理是改善纳米颗粒厚膜的连续性和气敏特性的有效方法。

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  • 来源
    《Applied Surface Science》 |2012年第11期|p.4866-4870|共5页
  • 作者

    Haifeng Liu; Tongjiang Peng; Guohua Ma; Hongjuan Sun; Hailong Hu;

  • 作者单位

    Analytical and Testing Center, Southwest University of Science and Technology, Mianyang 621010, PR China,Institution of Mineral Material and Application, Southwest University of Science and Technology, Mianyang 621010. PR China;

    Analytical and Testing Center, Southwest University of Science and Technology, Mianyang 621010, PR China,Institution of Mineral Material and Application, Southwest University of Science and Technology, Mianyang 621010. PR China;

    Analytical and Testing Center, Southwest University of Science and Technology, Mianyang 621010, PR China,Institution of Mineral Material and Application, Southwest University of Science and Technology, Mianyang 621010. PR China;

    Analytical and Testing Center, Southwest University of Science and Technology, Mianyang 621010, PR China,Institution of Mineral Material and Application, Southwest University of Science and Technology, Mianyang 621010. PR China;

    Analytical and Testing Center, Southwest University of Science and Technology, Mianyang 621010, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    composite; coating; gas sensor; thick film;

    机译：综合;涂层;气体传感器厚膜;

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