Rhombus-shaped Co3O4 nanorod arrays for high-performance gas sensor
Rhombus-shaped Co3O4 nanorod arrays for high-performance gas sensor
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DOI：
10.1016/j.snb.2013.05.093
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发表时间：
2013-09-01
影响因子：
8.4
通讯作者：
Ye, Zhizhen
中科院分区：
文献类型：
--
作者：
Wen, Zhen;Zhu, Liping;Ye, Zhizhen
通过一种简便的两步合成方法成功制备了基于菱形Co₃O₄纳米棒（NR）阵列的气体传感器，该方法包括形成菱形Co(OH)F NR阵列作为前驱体，然后在不改变原始形状的情况下热转化为多孔Co₃O₄。与电极的良好欧姆接触以及与基底的紧密接触避免了气体传感器复杂的制造过程。在450℃退火的NR阵列对乙醇检测表现出高性能。对500 ppm乙醇气体的响应达到约71，最佳工作温度低至160℃。同时，该传感器表现出良好的响应/恢复动力学（90秒和60秒），对几种干扰气体具有出色的选择性以及在3个月内测试的良好稳定性。此外，该传感器能够在低检测限下检测乙醇（
Rhombic Co3O4 nanorod (NR) array-based gas sensor was successfully fabricated via a facile two-step synthesis approach, including the formation of rhombic Co(OH)F NR arrays as precursor followed by thermal conversion to porous Co3O4 without altering the original shape. Good ohmic contacts with the electrodes and intensive contact with the substrates avoided complicated fabrication process of gas sensors. The NR arrays annealed at 450 degrees C showed high-performance of ethanol detection. The response to 500 ppm ethanol gas reached similar to 71 and the optimal working temperature was as low as 160 degrees C. Meanwhile, the sensor exhibited good response/recovery kinetics (90 s and 60 s), outstanding selectivity over several interferential gases and good stability tested in 3 months. In addition, the sensor could detect ethanol at a low detection limit (