Fluorescent chemosensor for pyridine based on N-doped carbon dots

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

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

Revista

Título: Journal of Colloid and Interface Science

Vol. 458

Páginas: 209-216

ISSN: 0021-9797

Editora: Elsevier

Indexação

ISI Web of Knowledge - 54 Citações

Scopus - 54 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8