检出限
碳量子点
量子点
材料科学
聚合物
配位聚合物
纳米技术
氨
选择性
电极
重复性
分子印迹聚合物
化学工程
化学
复合材料
催化作用
色谱法
有机化学
物理化学
工程类
作者
Dongzhi Zhang,Ying Luo,Zhaodi Huang,Mingcong Tang,Jianpeng Sun,Xiaokang Wang,Xia Wang,Yutong Wang,Wenting Wu,Fang Dai
标识
DOI:10.1016/j.jcis.2022.10.059
摘要
Exposure to ammonia (NH3) is known harmful to health, environment and industrial facilities, hence it is important for the trace detection of NH3. Herein, for the first time, ultrasensitive room temperature NH3 sensors are realized by assembling carbon quantum dots (CQDs) on free-standing ultrathin coordination polymers (CPs) nanosheets (Co[Ni(CN)4]) with an average thickness of ∼2.5 nm, which demonstrate excellent sensitivity (Ra/Rg = 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 NH3 gas. The NH3 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.
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