Cao Shuang, Song Zhao, Bing Yu, Xu Xiaoyi, Zhou Tingting, Zhang Tong
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P.R. China.
ACS Sens. 2024 Jun 28;9(6):2979-2988. doi: 10.1021/acssensors.4c00144. Epub 2024 May 31.
The development of a highly selective and trace-level gas sensing platform for detecting hydrogen sulfide (HS) remains a formidable challenge. To solve this problem, Co-Mo multimetal oxide semiconductors are rationally tailored by employing metal organic frameworks (MOFs) as self-sacrificial templates. The MOF-derived CoO/β-CoMoO based gas sensors displays high sensitivity (/ = 22) to 10 ppm of HS and ultralow limit of detection (10 ppb HS). The formation of p-p heterojunction and multivalence states of Mo play a crucial role in electron transfer and oxygen adsorption. A sensor array constructed from four CoO/β-CoMoO materials with different Co/Mo ratios demonstrates a superior selective discrimination of HS from other VOCs and malodorous gases by principal component analysis (PCA). Besides, a HS gas sensing and alarming platform was designed for monitoring the environment contaminated with HS. This finding provides a feasible approach for the discovery of highly efficient gas sensors to monitor environmental HS concentration.
开发一种用于检测硫化氢（HS）的高选择性和痕量水平气体传感平台仍然是一项艰巨的挑战。为了解决这个问题，通过使用金属有机框架（MOF）作为自牺牲模板，对Co-Mo多金属氧化物半导体进行了合理的定制。基于MOF衍生的CoO/β-CoMoO的气体传感器对10 ppm的HS显示出高灵敏度（/ = 22）和超低检测限（10 ppb HS）。p-p异质结的形成和Mo的多价态在电子转移和氧吸附中起着关键作用。由四种具有不同Co/Mo比的CoO/β-CoMoO材料构建的传感器阵列通过主成分分析（PCA）显示出对HS与其他挥发性有机化合物（VOC）和恶臭气体的卓越选择性区分。此外，还设计了一个HS气体传感和报警平台来监测被HS污染的环境。这一发现为发现用于监测环境HS浓度的高效气体传感器提供了一种可行的方法。
