Zou Hao-Yun, Li Lin-Xuan, Huang Ying, Tang Yi, Wu Jian-Ping, Xiao Zhong-Liang, Zeng Ju-Lan, Yu Donghong, Cao Zhong
Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation & Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China.
Water Division, Sinopec Baling Petrochemical Co., Ltd, Yueyang 414014, China.
Anal Methods. 2023 Mar 9;15(10):1315-1322. doi: 10.1039/d2ay01891h.
In this work, a new type of HS sensor was fabricated by means of drop-coating of an Au/SnO-SnO nanosheet material, which was prepared by a one-pot hydrothermal reaction, onto a gold electrode in an alumina ceramic tube with the formation of a thin nanocomposite film. The microstructure and morphology of the nanosheet composites were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A gas-sensitivity study presented good HS-sensing performance of such Au/SnO-SnO nanosheet composites. At an optimal operating temperature of 240 °C and ambient temperature of 25 °C, the resulting sensor showed a good linear response to HS in a range of 1.0 to 100 ppm with a low detection limit of 0.7 ppm, and a very fast response-recovery time of 22 s for response and 63 s for recovery, respectively. The sensor was also unaffected by ambient humidity and had good reproducibility and selectivity. When being applied to the monitoring of HS in an atmospheric environment in a pig farm, the response signal to HS was only attenuated by 4.69% within 90 days, proving that the sensor had a long and stable service lifetime for continuous running and showing its important practical application prospects.
在本工作中，通过将采用一锅水热反应制备的Au/SnO-SnO纳米片材料滴涂到氧化铝陶瓷管中的金电极上，形成薄的纳米复合膜，制备了一种新型的HS传感器。通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）对纳米片复合材料的微观结构和形态进行了表征。气敏性研究表明这种Au/SnO-SnO纳米片复合材料具有良好的HS传感性能。在240℃的最佳工作温度和25℃的环境温度下，所得传感器对1.0至100 ppm范围内的HS表现出良好的线性响应，检测限低至0.7 ppm，响应恢复时间非常快，响应时间为22 s，恢复时间为63 s。该传感器也不受环境湿度影响，具有良好的重现性和选择性。当应用于猪场大气环境中HS的监测时，对HS的响应信号在90天内仅衰减4.69%，证明该传感器具有长且稳定的连续运行使用寿命，并显示出其重要的实际应用前景。
