Silica xerogel surface grafted with aminopropyl (PrNH2) groups was additionally treated by cetyltrimethylammonium bromide (CTAB) surfactant and ascorbic acid (asc) in alkaline solution. This material symbolized as SiO2-PrNH2-CTAB/asc, proved to be a stable luminescent material, exhibited an emission band peaked at 393 nm under excitation wavelength 335 nm. Time evolution of the band intensity suggests changes of defect concentration on the silica surface owing to modification reaction with alkaline mixture of CTAB and asc. After this treatment the material could serve as a luminescence recognition element revealing selectively Cu²⁺ cations in presence of other metal ions in solutions. On the other hand, emission spectra excited by wavelength 236 nm confirmed selectively presence of Pb²⁺ and simultaneously Cu²⁺ cations in aqueous solutions. In this way the luminescent material could play the role of INHIBIT and YES logic gates for both the mentioned cations. A novel luminescent chemical sensor for the determination of Pb 2+ and Cu 2+ ions.
Authors
- Andrzej Klonkowski,
- Maja Orłowska,
- dr hab. inż. Jacek Ryl link open in new tab
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1016/j.snb.2017.01.163
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2017
