一种基于碳点的新型荧光试纸用于选择性灵敏检测Cr(VI) 。
A Novel Fluorescent Test Papers Based on Carbon Dots for Selective and Sensitive Detection of Cr (VI).
作者信息
Yang Yizhou, Chen Xuemei, Wang Yangyang, Wu Miao, Ma Yinan, Yang Xudong
机构信息
Key Laboratory of Advanced Structural Materials, Ministry of Education, School of Materials Science and Engineering, Changchun University of Technology, Changchun, China.
School of Chemical Engineering, Changchun University of Technology, Changchun, China.
出版信息
Front Chem. 2020 Dec 1;8:595628. doi: 10.3389/fchem.2020.595628. eCollection 2020.
In recent years, carbon dots (CDs) are promising fluorescence probes for ions detection. In this paper, the CDs which are with an average diameter of 5.5 nm were synthesized through a simple one-step hydrothermal carbonization of ethylene diamine tetraacetic acid (EDTA) salt. The CDs have strong yellow photoluminescence (PL) with a maximum emission intensity at 550 nm under an excitation wavelength of 450 nm. As the electron transfer will occur between Cr (VI) and the CDs, yellow fluorescence was quenched after adding the Cr (VI) ions. The CDs probe allows the detection of Cr (VI) ions over a concentration range from 0 to 0.1 M ( = 0.987) and the lower detection limit is 10 M. Simultaneously, the CDs show highly selectivity and stability toward the detection of Cr (VI) ions.
近年来，碳点（CDs）是用于离子检测的有前景的荧光探针。本文通过对乙二胺四乙酸（EDTA）盐进行简单的一步水热碳化合成了平均直径为5.5 nm的碳点。在450 nm激发波长下，碳点具有强烈的黄色光致发光（PL），在550 nm处有最大发射强度。由于Cr（VI）与碳点之间会发生电子转移，加入Cr（VI）离子后黄色荧光猝灭。该碳点探针可检测浓度范围为0至0.1 M（ = 0.987）的Cr（VI）离子，最低检测限为10 M。同时，碳点对Cr（VI）离子的检测具有高度选择性和稳定性。
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