Amino-functionalized silica-encapsulated Mn/ZnS quantum dots for the room-temperature phosphorescence determination of graphene oxide in environmental water samples
作者： Yaping Zhong , Qingpu Wang , Yu He , Yili Ge , Gongwu Song
DOI: 10.1039/C5AY01623A
关键词: Graphene 、 Wavelength 、 Oxide 、 Nanoparticle 、 Excitation 、 Detection limit 、 Phosphorescence 、 Analytical chemistry 、 Materials science 、 Quantum dot
摘要: We developed a simple and sensitive room-temperature phosphorescence (RTP) method for the determination of graphene oxide (GO) in environmental water samples using amino-functionalized silica-encapsulated Mn/ZnS quantum dots (Mn/ZnS@SiO2-NH2) as phosphorescent probe. The maximum excitation emission wavelengths synthesized Mn/ZnS@SiO2-NH2 nanoparticles were 320 nm 595 nm. RTP intensity could be quenched presence GO with detection limit low 1.0 mg L−1. Good linear correlations obtained over concentration range from 0 to 10.0 L−1 correlation coefficient 0.9987, 25.0 0.9979. quenching mechanism was also discussed. This successfully applied which allows more opportunities its application biological systems.
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