Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 458, Issue -, Pages 209-216Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2015.07.053
Keywords
Carbon nanomaterial; Nanoparticle; N-doped carbon dots; Pyridine sensor
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Funding
- PLASMON program from ESF
- Spanish Ministry of Economy and Competitiveness [CTQ2013-48411-P]
- Junta Comunidades Castilla-La Mancha [PEIC-2014-001-P]
- INCRECYT research contract
- [SFRH/BD/84318/2012]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/84318/2012] Funding Source: FCT
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Fluorescent carbon dots (CDs) and its nitrogen doped (N-CDs) nanoparticles have been synthesized from lactose as precursor using a bottom-up hydrothermal methodology. The synthesized nanoparticles have been characterized by elemental analysis, FUR, Raman, TEM, DLS, XPS, and steady-state and life-time fluorescence. The synthesized carbon nanoparticles, CDs and N-CDs, have a size at about 7.7 +/- 2.4 and 50 +/- 15 nm, respectively, and quantum yields of 8% (CDs) and 11% (N-CDs). These techniques demonstrated the effectiveness of the synthesis procedure and the functionalization of the CDs surface with amine and amide groups in the presence of NH3 in aqueous media. The effect of excitation wavelength and pH on the luminescent properties was studied. Under the optimal conditions, the nitrogen doped nanoparticles can be used as pyridine sensor in aqueous media because they show an enhancement of its fluorescence with a good linear relationship. The analytical method is simple, reproducible and very sensitive for pyridine determination. (C) 2015 Elsevier Inc. All rights reserved.
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