Dual-emission quantum dots nanocomposites bearing an internal standard and visual detection for Hg2+.
A novel dual-fluorescence quantum dots (QD) nanocomposite with tuning emission wavelength and fluorescence intensity was synthesized, in which CdS and CdTe were the internal standard and probe, respectively. This nanocomposite exhibited good photobleaching and pH stability, and exhibited selective sensing for Hg(2+) with a detection limit (3SD/k) of 5.6 nM. Based on the blue background emitted by the internal standard CdS, a novel visual fluorescence detection method has been established, and can be used for the qualitative and semi-quantitative colorimetric analysis of Hg(2+).
College of Material Science and Engineering, Huaqiao University, Xiamen, 361021, China. sunxy@hqu.edu.cn
Xiangying
X
Sun
Bin
B
Liu
Yibang
Y
Xu
D019187:Cadmium Compounds / Q000737:chemistry; D004785:Environmental Pollutants / Q000032:analysis* / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D008628:Mercury / Q000032:analysis* / Q000737:chemistry; D053761:Nanocomposites / Q000737:chemistry*; D045663:Quantum Dots; D012015:Reference Standards; D013050:Spectrometry, Fluorescence / Q000379:methods* / Q000592:standards; D013440:Sulfides / Q000737:chemistry; D013691:Tellurium / Q000737:chemistry; D013864:Thioglycolates / Q000737:chemistry
D019187:Cadmium Compounds; D004785:Environmental Pollutants; D005456:Fluorescent Dyes; D013440:Sulfides; D013864:Thioglycolates; C034939:cadmium sulfide; C017487:2-mercaptoacetate; D008628:Mercury; D013691:Tellurium; C028337:cadmium telluride