Synthesis Geraphene-TiO2 nanocomposites and investigation its adsorption on Acid red 22 color and Pb2+ ion

Graphene Oxide have synthesized successfully through Staudenmeier and Hummer methods. In the next step Reduced graphene oxide- TiO2 (RGO-TiO2) and RGO-TiO2-Fe nanocomposites synthesized through a facile hydrothermal reaction with using graphene oxide (GO) and TTIP (and Fe) as starting materials in ethanol- acetic acid solvent, followed by calcinations. These synthesized materials characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), BET, TGA, IR and Raman spectroscopy. Our experiments in order to removal Acid Red22 color was performed by UV-VIS spectrophotometer. Also we observed that amount of doped TiO2 increased when we used the GO obtained by Hummer method for synthesis RGO-TiO2 nanocomposite that showed is more suitable for photocatalytic reactions. Also our isometric calculations showed that the adsorption Acid Red22 color on RGO-TiO2 nanocomposite follows Langmuir isotherm. In order to more investigations, we used RGO-TiO2- Fe nanocomposite (by GOs obtained from Staudenmeier and Hummer methods) for removal Pb2+ ion by Flame Atomic Absorption Spectroscopy (FAAS). Our results showed that amount of adsorption of Pb2+ dramatically increased when we used GO obtained by Hummer method for synthesis RGO-TiO2 –Fe nanocomposite.

کلیدواژه ها:

nanocomposite ، Langmuir ، hydrothermal reaction ، graphene