Synthesis and characterisation of amine-grafted graphene oxide-TiO2 crystal/plate composite and its crystal growth

Abstract

Owning to their extensive practical application, the controllable synthesis of well-faceted TiO2 crystal with high percentage of reactive facets has attracted increasing attention. When adjusting the concentration of HF at 120 mM and 240 mM, anatase TiO2 crystal and plate with exposed {001} facets had been fabricated on the amine-grafted graphene oxide (AGO) via a facile hydrothermal method. The influence of experiment conditions on the morphology of the final products was investigated in detail. The results showed that the morphology of TiO2 crystal on AGO transforms cube-like structure into truncated tetragonal bipyramid structure when extending the reaction time, and the size of TiO2 crystal were affected by the molar ratio of F/Ti. In addition, the dispersion of TiO2 plate were improved by amino or oxygen-containing group on AGO sheet.