College of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.
College of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.
J Colloid Interface Sci. 2023 Jan 15;630(Pt B):776-785. doi: 10.1016/j.jcis.2022.10.059. Epub 2022 Oct 18.
Exposure to ammonia (NH) is known harmful to health, environment and industrial facilities, hence it is important for the trace detection of NH. Herein, for the first time, ultrasensitive room temperature NH sensors are realized by assembling carbon quantum dots (CQDs) on free-standing ultrathin coordination polymers (CPs) nanosheets (Co[Ni(CN)]) with an average thickness of ∼2.5 nm, which demonstrate excellent sensitivity (R/R = 87.7 to 30 ppm), fast gas response speed (∼10 s to 30 ppm), remarkable repeatability, high selectivity, good long-term stability and low limit of theoretical detection (∼8 ppb) toward NH gas. The NH gas sensor enhancement through incorporation of CQDs provides a simple and environment-friendly strategy for further improving sensor property of CPs nanosheets. This work provides an effective way to construct new electrode materials for high-performance gas sensor devices via the rational design.
暴露于氨（NH）会对健康、环境和工业设施造成危害，因此痕量检测 NH 非常重要。在此，我们首次通过将碳量子点（CQDs）组装到自由站立的超薄配位聚合物（CPs）纳米片（Co[Ni（CN）]）上来实现超灵敏的室温 NH 传感器，该 CP 纳米片的平均厚度约为 2.5nm，对 NH 气体表现出优异的灵敏度（R/R=87.7 至 30ppm）、快速的气体响应速度（10s 至 30ppm）、显著的重复性、高选择性、良好的长期稳定性和低理论检测限（8ppb）。通过引入 CQDs 提高 NH 气体传感器的性能提供了一种简单且环保的策略，可进一步改善 CPs 纳米片的传感器性能。这项工作通过合理设计为构建高性能气体传感器器件的新型电极材料提供了一种有效的方法。
