检出限
离子
水溶液中的金属离子
纳米团簇
荧光
碳纤维
铜
线性范围
化学
猝灭(荧光)
材料科学
核化学
分析化学(期刊)
无机化学
纳米技术
色谱法
有机化学
物理
光学
复合数
复合材料
作者
Hanyu Bai,Zaiqian Tu,Yitong Liu,Qunxi Tai,Zhongkai Guo,Siyu Liu
标识
DOI:10.1016/j.jhazmat.2019.121654
摘要
The pollution of heavy metal increases greatly accompanying by the development of industries. So, it is very important to build up a quick and reliable technique for detection of heavy metal ions. In this work, we developed a simple and convenient method for ratiometric and visual detection of Cr2O72- ions and Cd2+ ions. We utilized glutathione as raw material to prepare cyan-emitting carbon dots ([email protected]). The [email protected] were further used as the template to prepare carbon dots-stabilized copper nanoclusters ([email protected] NCs) that displayed two well-separated emission peaks respectively at 450 nm and 750 nm. The [email protected] NCs can be applied for the ratiometric and visual detection of Cr2O72- and Cd2+ ions based on the fluorescence quenching or enhancement of [email protected] NCs at 750 nm. A linear range of 2–40 μmol L-1 with a detection limit of 0.9 μmol L-1 for Cr2O72- ions, and a linear range of 0–20 μmol L-1 with a detection limit of 0.6 μmol L-1 for Cd2+ ions were achieved based on this method. The fluorescent test strips for Cr2O72- ions were successfully prepared based on [email protected] NCs. Moreover, the [email protected] NCs were successfully applied to determine Cr2O72- and Cd2+ ions in real samples with promising results.
科研通智能强力驱动
Strongly Powered by AbleSci AI