3D Mosaic Carbon Nanofiber Sensors for Room-Temperature Detection of Methane and Other Dissolved Gases in Transformer Oil

文献类型： 外文期刊

第一作者： Xu, Chengcheng

作者： Xu, Chengcheng;Wang, Yang;Zheng, Xing;Long, Yin;Du, Hongfei;Du, Xiaosong;Li, Xian;Bai, Chunjiang

作者机构：

关键词： carbon fibers; methane sensors; mosaic; principle component analysis; room temperature

期刊名称：ADVANCED MATERIALS INTERFACES （ 影响因子：5.4； 五年影响因子：5.7 ）

ISSN： 2196-7350

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Hydrocarbons and carbon oxides are typical dissolved gases in transformer oil that reflect the latent pitfalls, on-line monitoring of their concentrations can effectively evaluate the operating status of the power transformer. However, these low-concentration targets (especially for CH4) show high chemical inertness at room temperature, challenging the sensitive performance of current commonly used chemiresistive gas sensors. Herein, a strategy by combining traditional inorganic semiconductors to carbon nanofiber (CNF) via electrospinning-annealing route is described. Three optimized 3D mosaic films, CNFs scaffold incorporated with WO3, SnO2 and MoS2 nanoparticles, are obtained. Due to the large specific surface area of the 3D network, and the synergic and heterojunction effects between nanoparticles and CNFs, all three sensors exhibit high response to CH4 at room temperature, and also record distinguishable signals toward H-2, C2H4, CO and CO2, revealing the three sensors are cross-sensitive to the five analytes. Accordingly, preliminary discrimination of five dissolved gases is realized by principle component analysis. This study provides an effective and extendable solution of preparing room-temperature chemiresistive sensors for the detection of CH4 and other gases, and offers a strategy for the construction of sensor array to achieve a high discrimination capability.

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