Gas sensors based on multiwall carbon nanotubes decorated with tin oxide nanoclusters
Gas sensors based on multiwall carbon nanotubes decorated with tin oxide nanoclusters
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DOI：
10.1016/j.snb.2009.12.044
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发表时间：
2010-03-04
影响因子：
8.4
通讯作者：
Llobet, Eduard
中科院分区：
文献类型：
--
作者：
Leghrib, Radouane;Pavelko, Roman;Llobet, Eduard
基于氧等离子体处理的多壁碳纳米管修饰的氧化锡纳米团簇的杂化纳米材料的合成通过沉淀的SnO2胶体悬浮液中的存在下的碳纳米管分散在前体乙酸锡（II）在无水乙酸的母液。TEM分析表明，锚定在碳纳米管侧壁的氧化锡纳米团簇的尺寸约为5 nm。制备了具有不同碳纳米管与氧化锡比例的杂化纳米材料，并研究了它们在室温和150 ℃下操作时的气敏性能，并与纯氧化锡或纯氧等离子体处理的多壁碳纳米管传感器的性能进行了比较。当采用等离子体处理的纳米管和氧化锡前体的量之间的适当比率时，混合传感器在ppb范围内的二氧化氮和低ppm范围内的一氧化碳的检测中显示出上级性能。此外，这些优化的传感器显示出显著降低的水分交叉敏感性。检测机制进行了讨论。(C)2009爱思唯尔有限公司版权所有。
Hybrid nanomaterials based on oxygen plasma treated multiwall carbon nanotubes decorated with tin oxide nanoclusters were synthesised by the precipitation of a SnO2 colloidal suspension in the presence of carbon nanotubes dispersed in the mother solution of precursor tin (II) acetate in a water free acetic acid. TEM analysis revealed that the size of tin oxide nanoclusters anchored at the carbon nanotube sidewalls is about 5 nm. Hybrid nanomaterials with different carbon nanotube to tin oxide ratios were prepared and their gas sensing properties when operated at room temperature and at 150 degrees C were investigated and compared against the properties of pure tin oxide or pure oxygen plasma treated multiwall carbon nanotube sensors. When an appropriate ratio between the amount of plasma treated nanotubes and tin oxide precursors is employed, hybrid sensors show superior performance in the detection of nitrogen dioxide in the ppb range and carbon monoxide in the low ppm range. Furthermore, these optimised sensors show a significantly reduced moisture cross-sensitivity. Detection mechanisms are discussed. (C) 2009 Elsevier B.V. All rights reserved.