Abstract
This paper reported a convenient method to prepare water-soluble graphene oxide (GO) functionalized by amine-modified mesoporous silica nanoparticles (MSNs) containing poly(p-phenylenevinylene) via covalent bonds. The resulted GO-PPV@MSN hybrid materials had a good dispersion and strong green fluorescence in aqueous solution. The structure, morphology and optical properties of the resulting hybrid materials were characterized. The GO-PPV@MSN can be used as a novel and effective fluorescent sensing platform for detection of 2,4,6-trinitrotoluene (TNT) in aqueous solution by fluorescence resonance energy transfer (FRET). Upon the addition of TNT, the amino groups on the surface of PPV@MSN can bind TNT molecules from solution by forming Meisenheimer complex, and this complex can absorb the green part of visible light, and strongly suppress the fluorescence emission of GO-PPV@MSN through FRET. The observed linear fluorescence intensity change allowed the quantitative detection of TNT with a detection limit down to 1.3 × 10-7 M.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 122-129 |
| Number of pages | 8 |
| Journal | Dyes and Pigments |
| Volume | 101 |
| DOIs | |
| State | Published - 2014 |
All Science Journal Classification (ASJC) codes
- General Chemical Engineering
- Process Chemistry and Technology