呋喃西林
荧光
量子点
检出限
化学
线性范围
荧光光谱法
光化学
基质(水族馆)
材料科学
光谱学
纳米技术
色谱法
光学
物理
地质学
海洋学
医学
传统医学
量子力学
作者
Tianyi Wang,Fubin Pei,Chun Li,Yue Ni,Mingzhu Xia,Shasha Feng,Qingli Hao,Ting‐Hai Yang,Wu Lei
标识
DOI:10.1016/j.saa.2021.120727
摘要
In the paper, a novel fluorescent probe based on Ag2S QDs/g-C3N4 composite was synthesized by loading Ag2S quantum dots (Ag2S QDs) on the surface of g-C3N4 through in-situ synthesis method and developed to detect Nitrofurazone (NFZ) sensitively. The results showed that the linear detection range of Ag2S QDs/g-C3N4 to NFZ was 0-30 μM, with a low detection limit of 0.054 μM. The results of time-fluorescence-resolved spectroscopy and UV-vis absorption spectroscopy exhibited that the possible detection mechanism of Ag2S QDs/g-C3N4 to NFZ was proposed to be Internal Filtration Effect (IFE). Moreover, Multiwfn wavefunction analysis was employed to uncover the possible interaction between the Ag2S QDs/g-C3N4 and NFZ, thereby further revealing the fluorescence detection mechanism from the scale of atoms. Combining experiments and theoretical calculations, we proposed the sensing mechanism of the formation of non-fluorescent ground state complex linked by hydrogen bonds. This work indicated that the Ag2S QDs/g-C3N4 composite processed the ability to detect NFZ efficiently and sensitively.
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