Ag-doped Ti3C2Tx sensor: A promising candidate for low-concentration H2S gas sensing

IF 4.4 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC High Voltage Pub Date : 2023-09-22 DOI:10.1049/hve2.12376

Fuping Zeng, Xiaoxuan Feng, Xiaoyue Chen, Hao Qiu, Yiming Yan, Qiang Yao, Ju Tang

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Abstract

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.

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掺银 Ti3C2Tx 传感器：有望用于低浓度 H2S 气体传感的候选器件

痕量硫化氢（H2S）可反映气体绝缘开关设备（GIS）中绝缘故障的严重程度，因此准确、快速地检测低浓度 H2S 对于 GIS 的在线监测、故障诊断和状态评估非常重要。通过滴涂自还原合成的掺银 Ti3C2Tx，制备了 Ag-Ti3C2Tx 化学电阻式传感器。所制备的传感器对 H2S 具有极佳的灵敏度和选择性，在 25°C（室温）下的检测限极低，仅为 18.57 ppb。与原始 Ti3C2Tx 传感器相比，Ag-Ti3C2Tx 传感器对百万分之十（ppm）H2S 的响应提高了 12 倍。Ti3C2Tx 与 Ag 纳米粒子（NPs）的复合实现了 H2S 检测的快速响应/恢复时间。进一步分析发现，H2S 传感性能的增强可归因于化学敏化、吸附氧物种调节和高布鲁纳-埃美特-泰勒（BET）表面积。这项研究为 Ag-Ti3C2Tx 作为室温传感材料检测 GIS 中的低浓度 H2S 铺平了道路。

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来源期刊

High Voltage Energy-Energy Engineering and Power Technology

CiteScore

9.60

自引率

27.30%

发文量

审稿时长

21 weeks

期刊介绍： High Voltage aims to attract original research papers and review articles. The scope covers high-voltage power engineering and high voltage applications, including experimental, computational (including simulation and modelling) and theoretical studies, which include: Electrical Insulation ● Outdoor, indoor, solid, liquid and gas insulation ● Transient voltages and overvoltage protection ● Nano-dielectrics and new insulation materials ● Condition monitoring and maintenance Discharge and plasmas, pulsed power ● Electrical discharge, plasma generation and applications ● Interactions of plasma with surfaces ● Pulsed power science and technology High-field effects ● Computation, measurements of Intensive Electromagnetic Field ● Electromagnetic compatibility ● Biomedical effects ● Environmental effects and protection High Voltage Engineering ● Design problems, testing and measuring techniques ● Equipment development and asset management ● Smart Grid, live line working ● AC/DC power electronics ● UHV power transmission Special Issues. Call for papers: Interface Charging Phenomena for Dielectric Materials - https://digital-library.theiet.org/files/HVE_CFP_ICP.pdf Emerging Materials For High Voltage Applications - https://digital-library.theiet.org/files/HVE_CFP_EMHVA.pdf