Yin Liang, Luan Jinfeng, Lv Li, Liu Bin, Ren Wenbin, Chu Xiangqun, Wang Jia, Lu Zheng, Zhang Pinhua, Du Lulu, Cui Guangliang
School of Physics and Electrical Engineering, Linyi University, Linyi 276000, China.
Rural Revitalization Institute, Linyi University, Linyi 276000, China.
ACS Appl Mater Interfaces. 2025 Apr 23;17(16):23588-23599. doi: 10.1021/acsami.4c22780. Epub 2025 Apr 13.
The detection of hydrogen sulfide (HS) in exhaled breath at room temperature is essential for health monitoring and disease diagnosis. This study investigates a ZnO/TiCT nanocomposite synthesized by combining ZnO nanoparticles, prepared by a hydrothermal method, with TiCT MXene. Experimental results demonstrate that the ZnO/TiCT nanocomposite sensors exhibit excellent HS detection performance at room temperature with high sensitivity, rapid response time, and robust recovery capability. Specifically, the ZnO/TiCT-1.0 wt % nanocomposite sensor shows a response of 85.116 at 5 ppm of HS, which is 14-fold and 35-fold greater than that of pure ZnO and TiCT MXene, respectively. The sensor exhibits a rapid response (50 s) and recovery time (115 s) at 100 ppb of HS. Additionally, it shows exceptional sensitivity to HS at low concentrations, with a detection limit as low as 1 ppb. Based on the excellent sensing performance, oral exhaled gas detection demonstrates that the sensor effectively differentiates HS levels in healthy and patient breath samples. These findings highlight the potential of the ZnO/TiCT nanocomposite in exhaled HS detection at room temperature, offering new insights for developing ultrasensitive biogas sensors.
室温下检测呼出气体中的硫化氢（HS）对于健康监测和疾病诊断至关重要。本研究探究了一种通过水热法制备的ZnO纳米颗粒与TiCT MXene相结合合成的ZnO/TiCT纳米复合材料。实验结果表明，ZnO/TiCT纳米复合传感器在室温下表现出优异的HS检测性能，具有高灵敏度、快速响应时间和强大的恢复能力。具体而言，ZnO/TiCT - 1.0 wt%纳米复合传感器在5 ppm的HS浓度下响应值为85.116，分别比纯ZnO和TiCT MXene高出14倍和35倍。该传感器在100 ppb的HS浓度下表现出快速响应（50秒）和恢复时间（115秒）。此外，它在低浓度HS下表现出卓越的灵敏度，检测限低至1 ppb。基于优异的传感性能，口腔呼出气体检测表明该传感器能够有效区分健康人和患者呼出气体样本中的HS水平。这些发现突出了ZnO/TiCT纳米复合材料在室温下呼出HS检测中的潜力，为开发超灵敏生物气体传感器提供了新的见解。
