Fluorescent chemosensor for pyridine based on N-doped carbon dots

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Campos, BB (Author) Other; Abellan, C (Author) Other; Zougagh, M (Author) Other; Jimenez Jimenez, J (Author) Other; Rodriguez Castellon, E (Author) Other; Joaquim C G E Esteves da Silva (Author) FCUP; Rios, A (Author) Other; Algarra, M (Author) Other

Journal

Title: Journal of Colloid and Interface Science

Vol. 458

Pages: 209-216

ISSN: 0021-9797

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 54 Citations

Scopus - 54 Citations

Other information

Authenticus ID: P-00G-E17

DOI: 10.1016/j.jcis.2015.07.053

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8