文献类型：期刊文献

英文题名：CeO2 quantum dots for highly selective and ultrasensitive fluorescence detection of 4-nitrophenol via the fluorescence resonance energy transfer mechanism

作者：Xu, Hongqiang[1];Wang, Hailong[1];Lu, Yixia[1];Zeng, Yanbo[1];Yang, Yiwen[1];Zhang, Zulei[1];Wang, Hongmei[1];Wang, Xiao[2];Li, Lei[1]

机构：[1]Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiahang Rd 118, Jiaxing 314001, Peoples R China;[2]East China Univ Sci & Technol, Sch Sci, Shanghai 200237, Peoples R China

年份：2021

卷号：262

外文期刊名：SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

收录：;EI(收录号：20212710587304);WOS:【SCI-EXPANDED(收录号:WOS:000713216400011)】；

基金：This work was supported by the Program for Public Welfare Technology of Zhejiang Province (LGF20B050001) , Natural Science Foundation of Zhejiang Province (LY20B050009) , and Program for Science and Technology of Jiaxing City (2018AY11002) .

语种：英文

外文关键词：CeO2; Quantum dots; Fluorescent detection; 4-Nitrophenol; FRET

摘要：A rapid and simple fluorescence probe based on CeO2 quantum dots (QDs) was developed for highly selective and ultrasensitive direct determination of 4-nitrophenol (4-NP). CeO2 QDs were prepared using the sol-gel method with the precursor of Ce(NO3)(3)center dot 6H(2)O as a cerium source. The products were characterized through high-resolution electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. The fluorescent probe based on CeO2 QDs exhibited a broad linear response to the concentration of 4-NP in the range of 0.005-75.00 mu M and provided a low detection limit of 1.50 nM. The fluorescence of CeO2 QDs was quenched by 4-NP through the fluorescence resonance energy transfer mechanism owing to the well overlaps between the fluorescence emission spectrum of CeO2 QDs with the ultraviolet absorption spectrum of 4-NP. This result was confirmed by the timeresolved fluorescence spectra and the evaluation of the interaction distance between CeO2 QDs and 4-NP. The prepared CeO2 QDs are successfully applied to the determination of 4-NP in real water samples, where the spiked recoveries range from 98.2% to 102.4%. (C) 2021 Elsevier B.V. All rights reserved.