Nikolaev Institute of Inorganic Chemistry SB RAS, Ak. Lavrentiev Avenue, 3, 630090 Novosibirsk, Russia.
Saint Petersburg State University of Architecture and Civil Engineering, Vtoraya Krasnoarmeiskaya, 4, 190005 Saint Petersburg, Russia.
Molecules. 2020 Apr 29;25(9):2073. doi: 10.3390/molecules25092073.
In this work, the novel hybrid nanomaterial SWCNT/SiPc made of single walled carbon nanotubes (SWCNT) cross-linked via axially substituted silicon (IV) phthalocyanine (SiPc) was studied as the active layer of chemiresistive layers for the detection of ammonia and hydrogen. SWCNT/SiPc is the first example of a carbon-based nanomaterial in which an axially substituted phthalocyanine derivative is used as a linker. The prepared hybrid material was characterized by spectroscopic methods, thermogravimetry, scanning and transmission electron microscopies. The layers of the prepared hybrid were tested as sensors toward ammonia and hydrogen by a chemiresistive method at different temperatures and relative humidity as well as in the presence of interfering gases like carbon dioxide, hydrogen sulfide and volatile organic vapors. The hybrid layers exhibited the completely reversible sensor response to both gases at room temperature; the recovery time was 100-200 s for NH and 50-120 s in the case of H depending on the gas concentrations. At the relative humidity (RH) of 20%, the sensor response was almost the same as that measured at RH 5%, whereas the further increase of RH led to its 2-3 fold decrease. It was demonstrated that the SWCNT/SiPc layers can be successfully used for the detection of both NH and H in the presence of CO. On the contrary, HS was found to be an interfering gas for the NH detection.
在这项工作中，研究了由单壁碳纳米管（SWCNT）通过轴向取代的硅（IV）酞菁（SiPc）交联形成的新型杂化纳米材料 SWCNT/SiPc 作为用于检测氨和氢的电阻式化学传感器的活性层。SWCNT/SiPc 是首例将轴向取代的酞菁衍生物用作连接体的基于碳的纳米材料。通过光谱法、热重分析法、扫描和透射电子显微镜对制备的杂化材料进行了表征。通过电阻式化学方法在不同温度和相对湿度下以及在二氧化碳、硫化氢和挥发性有机蒸气等干扰气体存在的情况下，对制备的混合层作为对氨和氢的传感器进行了测试。在室温下，混合层对两种气体都表现出完全可逆的传感器响应；对于 NH，恢复时间为 100-200 s，而对于 H，取决于气体浓度，恢复时间为 50-120 s。在相对湿度（RH）为 20%时，传感器响应几乎与在 RH 为 5%时测量的响应相同，而 RH 的进一步增加导致其下降 2-3 倍。结果表明，SWCNT/SiPc 层可成功用于在存在 CO 的情况下检测 NH 和 H。相反，HS 被发现是 NH 检测的干扰气体。
