Despite the critical need to monitor H₂S, a hazardous gas, in environmental and medical settings, there are currently no reliable methods for rapid and sufficiently discriminative H₂S detection in real-world humid environments. Herein, targeted hybridizing of Ti₃C₂T_x MXene with Ag nanoparticles on a field-effect transistor (FET) platform has led to a step change in MXene sensing performance down to ppb levels, and enabled the very high selectivity and fast response/recovery time under room temperature for H₂S detection in humid conditions. For the first time, we present a novel relative humidity (RH) self-calibration strategy for the accurate detection of H₂S. This strategy can eliminate the influence of humidity and enables the accurate quantitative detection of gas in the total RH range. We further elucidate that the superior H₂S sensing performance is attributed to the electron and chemical sensitization effects. This study opens new avenues for the development of high-performance MXene-based sensors and offers a viable approach for addressing real-world humidity effect for gas sensors generally.

尽管迫切需要在环境和医疗环境中监测危险气体H ₂ S，但目前还没有可靠的方法可以在现实世界的潮湿环境中进行快速且充分区分的 H ₂ S 检测。在此，Ti ₃ C ₂ T _x MXene 与 Ag 纳米粒子在场效应晶体管 (FET) 平台上的靶向杂交导致 MXene 传感性能的阶跃变化降至 ppb 级，并实现了非常高的选择性和快速响应/室温下潮湿条件下H ₂ S 检测的恢复时间。我们首次提出了一种新颖的相对湿度 (RH) 自校准策略，用于准确检测 H ₂S. 该策略可以消除湿度的影响，实现对总RH范围内气体的准确定量检测。我们进一步阐明，优越的 H ₂ S 传感性能归因于电子和化学敏化效应。这项研究为开发基于 MXene 的高性能传感器开辟了新途径，并提供了一种可行的方法来解决气体传感器的实际湿度效应。