A simulation of Pd-doped SWCNTs used to detect SF6 decomposition components under partial discharge
A simulation of Pd-doped SWCNTs used to detect SF6 decomposition components under partial discharge
复制标题
DOI：
10.1016/j.apsusc.2014.07.056
复制
发表时间：
2014-10-01
影响因子：
6.7
通讯作者：
Dai, Ziqiang
中科院分区：
文献类型：
--
作者：
Zhang, Xiaoxing;Gui, Yingang;Dai, Ziqiang
碳纳米管掺杂得到了广泛的研究。本工作旨在研究一种使用 Pd 掺杂锯齿形 (8,0) 单壁碳纳米管 (Pd-SWCNT) 检测 SF6 分解的五种气体成分（即 SO2、H2S、SOF2、SO2F2 和 CF4）的新型传感器。我们计算分子吸附的优先吸附位点、键合构型和吸附几何形状。电特性分析结果表明，Pd-SWCNT 对五种气体表现出不同的响应。 Pd-SWCNTs 吸附 SO2、H2S 和 SOF2 后，Pd-SWCNTs 的电导率按以下顺序增加：SO2 > SOF2 > H2S。 SO2F2 吸附到 Pd-SWCNT 上会略微降低电导率。相反，Pd-SWCNT 对其他气体分子 CF4 不敏感。我们得出结论，Pd-SWCNT 对 SO2、H2S、SOF2、SO2F2 和 CF4 具有良好的灵敏度和选择性。 (C) 2014 Elsevier B.V. 保留所有权利。
Carbon-nanotube doping is extensively researched. This work aims to investigate a novel sensor for detecting the five gas components of SF6 decomposition (i.e., SO2, H2S, SOF2, SO2F2, and CF4) using Pddoped zigzag (8,0) single-wall carbon nanotubes (Pd-SWCNTs). We compute the preferential adsorption sites, bonding configurations, and adsorption geometry for molecular adsorption. Results of electrical characteristics analysis reveal that Pd-SWCNTs show different responses to the five gases. After SO2, H2S, and SOF2 adsorbed onto Pd-SWCNTs, the conductivity of Pd-SWCNTs increases in the following order: SO2 > SOF2 > H2S. SO2F2 adsorption onto Pd-SWCNTs slightly decreases conductivity. Conversely, Pd-SWCNTs are not sensitive to the other gas molecule CF4. We conclude that Pd-SWCNTs have good sensitivity and selectivity to SO2, H2S, SOF2, SO2F2, and CF4. (C) 2014 Elsevier B.V. All rights reserved.