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首页> 外文期刊>Materials Chemistry and Physics >Synthesis, characterization and formaldehyde gas sensitivity of La_(0.7)Sr_(0.3)FeO_3 nanoparticles assembled nanowires
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Synthesis, characterization and formaldehyde gas sensitivity of La_(0.7)Sr_(0.3)FeO_3 nanoparticles assembled nanowires

机译：La_（0.7）Sr_（0.3）FeO_3纳米粒子组装纳米线的合成，表征及对甲醛的敏感性

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摘要

La_(0.7)Sr_(0.3)FeO_3 nanoparticles assembled nanowires were synthesized by a hydrothermal method assisted with cetyltrimethylammonium bromide (CTAB). The hydrothermal temperature was 180℃ and the annealed temperature was 700 ℃. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to characterize the morphology, composition and structural properties of the materials. The results showed that the La_(0.7)Sr_(0.3)FeO_3 nanoparticles assembled nanowires had a high aspect ratio (the largest aspect ratio >100); the size of the nanoparticles was about 20 nm and the diameter of the nanowires was about 100-150 nm. The growth mechanism of La_(0.7)Sr_(0.3)FeO_3 nanowires was discussed. Gas sensors were fabricated by using La_(0.7)Sr_(0.3)FeO_3 nanowires. Formaldehyde gas sensing properties were carried out in the concentration range of 0.1-100 ppm at the optimum operating temperature of 280 ℃. The response and recovery times to 20 ppm formaldehyde of the sensor were 110s and 50 s, respectively. The gas sensing mechanism of La_(0.7)Sr_(0.3)FeO_3 nanowires was investigated.
机译：通过十六烷基三甲基溴化铵（CTAB）辅助的水热法合成了La_（0.7）Sr_（0.3）FeO_3纳米粒子组装纳米线。水热温度为180℃，退火温度为700℃。使用扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线衍射（XRD）和X射线光电子能谱（XPS）表征材料的形貌，组成和结构特性。结果表明，La_（0.7）Sr_（0.3）FeO_3纳米粒子组装的纳米线具有较高的长径比（最大长径比> 100）。纳米颗粒的尺寸为约20nm，纳米线的直径为约100-150nm。讨论了La_（0.7）Sr_（0.3）FeO_3纳米线的生长机理。气体传感器是使用La_（0.7）Sr_（0.3）FeO_3纳米线制造的。在280℃的最佳工作温度下，甲醛气体的感测性能在0.1-100 ppm的浓度范围内进行。传感器对20 ppm甲醛的响应时间和恢复时间分别为110s和50s。研究了La_（0.7）Sr_（0.3）FeO_3纳米线的气敏机理。

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  • 来源
    《Materials Chemistry and Physics》 |2012年第1期|61-67|共7页
  • 作者

    Peng-Jun Yao; Jing Wang; Hai-Ying Du; Jin-Qing Qi;

  • 作者单位

    School of Electronic Science and Technology, Dalian University ofTechnology, Dalian 116023, PR China,School of Educational Technology, Shenyang Normal University, Shenyang 110034, PR China;

    School of Electronic Science and Technology, Dalian University ofTechnology, Dalian 116023, PR China;

    School of Electronic Science and Technology, Dalian University ofTechnology, Dalian 116023, PR China,Department of Electromechanical Engineering & Information, Dalian Nationalities University, Dalian 116600, PR China;

    School of Electronic Science and Technology, Dalian University ofTechnology, Dalian 116023, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nanostructures; semiconductors; chemical synthesis; X-ray photo-emission spectroscopy (XPS);

    机译：纳米结构半导体;化学合成X射线发射光谱（XPS）;

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