检出限
荧光
橙色(颜色)
猝灭(荧光)
材料科学
相对标准差
激发态
分析化学(期刊)
光化学
纳米技术
化学
色谱法
光学
物理
食品科学
核物理学
作者
Yu Gao,Linan Zhou,Zechang Li,Peng Sun,Qijun Dai,Ruifeng Xie,Fang Chai
标识
DOI:10.1016/j.jece.2023.111834
摘要
Creating a sensitive, accuracy and portable fluorescent probe to monitor Hg2+ with rapid visual convenient process is highly desirable but remains challenging. Herein, orange emissive carbon dots (O-CDs) were synthesized and optimized by solvothermal method using p-phenylenediamine (p-PDA) as precursor. The O-CDs emitted an orange emission at 594 nm excited at 480 nm, with QY of 23.25% and a long lifetime of 14.43 μs. The O-CDs exhibited sensitive quenching response towards Hg2+ based on dynamic quenching effect, which facilitated O-CDs utilizing as the fluorescent probe with the limit of detection at 37.6 nM. The O-CDs fulfilled sensing Hg2+ in environmental water with satisfactory recoveries (90.3%−107.8%) and relative standard deviation (RSD) of less than 3.81%, manifested their excellent environmental tolerance. Notably, the O-CDs based test paper was fabricated and served as a portable sensor with a smartphone assistant for detection of Hg2+, which greatly elevated the sensing performance of test paper. This work contributed an innovative approach for the synthesis of O-CDs, as well as a reliable sensitive sensor based on portable test paper for an intelligent readable recognizing system, which could be regarded as promising candidate for real detection of Hg2+.
科研通智能强力驱动
Strongly Powered by AbleSci AI