Correlation Between Crystal Structure And Thermal Reaction Of Tio2 - Graphene Oxide

TiO2 - Graphene oxide (GO) (GO = 0-1.0wt %) powders were synthesised using sol-gel method and annealed at 500 degrees C. The samples were then characterised using X-ray diffraction (XRD). The additional of GO gave significant influence on the crystal structure of TiO2. The lattice parameter of TiO2 were increased with decreasing GO concentration. The unit cell volume of TiO2-GO annealed in N-2 decreased with the oxygen occupancy. In contrary, the TiO2-GO annealed in O-2 has an increase in O-2 occupancies in the lattice that was nearly proportional to its unit cell volume. A continuous weight loss was recorded by TGA at a temperature range of T=30-1000 degrees C that were associated with H2O, C-H and C-O species. It is concluded that the Ti-O-C and Ti-C bonds were formed for samples annealed in O-2 and N-2 respectively. The weight loss of TiO2-GO annealed in O-2 is lesser than that annealed in N-2 for same concentration additional GO into TiO2.