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β‐Cyclodextrin protected Cu nanoclusters as a novel fluorescence sensor for graphene oxide in environmental water samples
Author(s) -
Zhong Yaping,
He Yu,
Ge Yili,
Song Gongwu
Publication year - 2017
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3226
Subject(s) - nanoclusters , graphene , fluorescence , oxide , quenching (fluorescence) , chemistry , dilution , hydrogen bond , analytical chemistry (journal) , inorganic chemistry , materials science , nanotechnology , environmental chemistry , molecule , organic chemistry , physics , quantum mechanics , thermodynamics
This paper proposed a simple and sensitive approach for detecting graphene oxide (GO) in a wide pH range in environmental water samples using fluorescent β‐CD protected Cu NCs based on the hydrogen‐bond interactions between GO and 6‐SH‐β‐CD. The influences of dilution ratio and pH were investigated. We found that the fluorescence quenching efficiency of Cu NCs by GO remained almost the same under pH from 4 to 10, which benefitted the monitoring of GO under different pH conditions in real samples. The fluorescence quenching mechanism was also discussed. The fluorescence of β‐CD protected Cu NCs could be quenched in the presence of GO with a lowest detection concentration of 0.1 mg·L −1 . Good linear correlations were obtained over the concentration range from 0 to 30 mg·L −1 at different pH values (pH = 4, pH = 7 and pH = 12). In addition, this method was successfully applied to the determination of GO in real samples which presents more opportunities for application in environmental and material sciences.