Journal
MICROCHIMICA ACTA
Volume 183, Issue 1, Pages 273-279Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-015-1650-1
Keywords
Quenching; Stern-Volmer plot; Heteroatom doping; Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; Transmission electron microscopy
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Funding
- Ph.D. Program Foundation of Ministry of Education of China [20133219110018]
- Qing Lan Project
- Six Major Talent Summit [XNY-011]
- Science and Technology Support Plan [BE2013126]
- PAPD of Jiangsu Province, China
- [NCET-12-0629]
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We report on the hydrothermal synthesis of boron-doped carbon dots (B-CDs) starting from glucose and boric acid. Doping of the CDs with boron was confirmed by Fourier transform infrared and X-ray photoelectron spectroscopy. The B-CDs have an average diameter of about 4 nm and display blue fluorescence which is dynamically quenched by Fe(III) ions. This finding was exploited to design a method for the determination of Fe(III) in water. The relative fluorescence intensity at 359 nm in the presence and of absence ions is inversely proportional to the concentration of Fe(III) ions, and a Stern-Volmer calibration plot is linear in the concentration range of 0-16 mu M, with a 242 nM detection limit. The assay is sensitive, robust and selective.
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