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Highly Sensitive and Selective Fluorescence Probe for 2,4‐Dinitrophenylhydrazine Detection in Wastewater Using Water‐Soluble CdTe QDs
Author(s) -
Wang Qiuyue,
Wang Xuehan,
Wu Yiwei
Publication year - 2019
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/php.13084
Subject(s) - thioglycolic acid , fluorescence , cadmium telluride photovoltaics , chemistry , quenching (fluorescence) , masking agent , analytical chemistry (journal) , photochemistry , chromatography , materials science , nanotechnology , organic chemistry , physics , quantum mechanics
A simple, cheap, sensitive and selective probe for determination of DNPH in wastewater using thioglycolic acid (TGA)‐coated CdTe QDs (TGA‐QDs) as fluorescence probe has been established, and the properties of CdTe QDs were characterized by TEM, FT‐IR, DLS, XRD and zeta potentials. CdTe QDs fluorescence is highly efficiently quenched after adding DNPH on account of electron transfer effect, and the fluorescence quenching behavior of CdTe QDs interaction with DNPH is static quenching process. A good linear relationship is observed between the relative fluorescence intensity ( F 0 / F ) and 0.06–10 ng mL −1 of DNPH. As compared with some of reported methods, LOD of this method for analysis of DNPH (0.23 ng mL −1 ) is the lowest. Masking agents of DDTC and NH 4 OH can eliminate the interference of Cu 2+ , Ag + and Hg 2+ . Hence, DNPH can be selectively and accurately detected and the established method was successfully used for detecting DNPH in wastewater with acceptable recovery of 90.6–102%.