β-Cyclodextrin protected Cu nanoclusters as a novel fluorescence sensor for graphene oxide in environmental water samples.
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-1at 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.
Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China.
Yaping
Y
Zhong
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Wuhan, China.|Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China.
Yu
Y
He
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Wuhan, China.|Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China.
Yili
Y
Ge
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Wuhan, China.|Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China.
Gongwu
G
Song
D003300:Copper / Q000737:chemistry*; D005453:Fluorescence; D006108:Graphite / Q000032:analysis* / Q000737:chemistry; D006860:Hydrogen Bonding; D006863:Hydrogen-Ion Concentration; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000737:chemistry*
D014874:Water Pollutants, Chemical; D047392:beta-Cyclodextrins; D006108:Graphite; D003300:Copper
fluorescence quenching; graphene oxide; β-CD protected Cu NCs