Trace hydrogen sulphide (H₂S) could reflect the severity of insulation faults in gas-insulated switchgear (GIS), therefore, accurate and fast detection of low-concentration H₂S is important for on-line monitoring, fault diagnosis, and state evaluation in GIS. Ag-Ti₃C₂T_x chemiresistive-type sensors were fabricated via drop-coating with self-reduction synthesised Ag-doped Ti₃C₂T_x. The as-prepared sensors exhibited an excellent sensitivity and selectivity to H₂S with an extremely low detection of limit of 18.57 parts per billion (ppb) at 25°C (room temperature). The response of Ag-Ti₃C₂T_x sensor to 10 parts per million (ppm) H₂S was enhanced ∼12 times than that of the pristine Ti₃C₂T_x sensor. The compositing of Ti₃C₂T_x with Ag nanoparticles (NPs) enabled the fast response/recovery time for H₂S detection. Further analysis found that the enhanced H₂S sensing performances could be attributed to chemical sensitisation, adsorbed oxygen species regulation and high Brunauer–Emmett–Teller (BET) surface area. This study paves the way for Ag-Ti₃C₂T_x as room-temperature sensing materials to detect low-concentration H₂S in GIS.

中文翻译：

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掺银 Ti3C2TX 传感器：低浓度 H2S 气体传感的有希望的候选者

微量硫化氢（H ₂ S）可以反映气体绝缘开关设备（GIS）绝缘故障的严重程度，因此准确、快速地检测低浓度H ₂ S对于在线监测、故障诊断和状态监测具有重要意义。 GIS 中的评估。采用自还原合成的Ag掺杂Ti ₃ C ₂ T _x滴涂法制备Ag-Ti ₃ C ₂ T _x化学电阻型传感器。所制备的传感器对 H ₂ S 表现出优异的灵敏度和选择性，在 25°C（室温）下检测限极低，为十亿分之 18.57 (ppb)。_{Ag-Ti 3}的响应C ₂ T _x传感器对百万分之十 (ppm) H ₂ S 的检测能力比原始 Ti ₃ C ₂ T _x传感器提高了约 12 倍。_{Ti 3} C ₂ T _x与Ag纳米颗粒(NP)的复合使得H ₂ S检测的响应/恢复时间更快。进一步分析发现，增强的 H ₂ S 传感性能可归因于化学敏化、吸附氧调节和高 Brunauer-Emmett-Teller (BET) 表面积。_{这项研究为 Ag-Ti 3} C ₂ T _x铺平了道路作为室温传感材料检测GIS中的低浓度H _{2 S。}