Effect of plasma treatment on multi-walled carbon nanotubes for the detection of H2S and SO2.

Effect of plasma treatment on multi-walled carbon nanotubes for the detection of H2S and SO2.
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DOI:
10.3390/s120709375
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发表时间:
2012
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Luo C
Luo C
中科院分区:
其他
文献类型:
--
作者:
Zhang X;Yang B;Wang X;Luo C

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H2S和SO2是气体绝缘组合电器(GIS)中潜在绝缘缺陷产生的局部放电(PD)的重要特征气体。H2S和SO2的检测对GIS运行状态的诊断和评价具有重要意义。在本文中,我们进行了实验的未改性的多壁碳纳米管(MWNTs)和大气压介质阻挡放电(DBD)的空气等离子体在不同的时间(30,60和120 s)的H2S和SO2,分别的气敏性。结果表明,改性后的MWNTs对H2S的灵敏度和响应时间均有所提高,而对SO2的灵敏度和响应时间则相反。改性后的MWNTs对SO2的敏感性几乎为零。因此,常压DBD空气等离子体修饰的MWNTs对H2S具有良好的选择性,在H2S检测方面具有很大的潜力。
H2S and SO2 are important characteristic gases of partial discharge (PD) generated by latent insulated defects in gas insulated switchgear (GIS). The detection of H2S and SO2 is of great significance in the diagnosis and assessment of the operating status of GIS. In this paper, we perform experiments on the gas sensitivity of unmodified multi-walled carbon nanotubes (MWNTs) and those modified by atmospheric pressure dielectric barrier discharge (DBD) air plasma at different times (30, 60 and 120 s) for H2S and SO2, respectively. The results show that the sensitivity and response time of modified MWNTs to H2S are both improved, whereas the opposite effects are observed for SO2. The modified MWNTs have almost zero sensitivity to SO2. Thus, the MWNTs modified by atmospheric pressure DBD air plasma present good selectivity to H2S, and have great potential in H2S detection.
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