Preparation And Photocatalytic Properties Of Different Morphology Nano-sized TiO₂ And TiO₂/GO

Titanium dioxide?TiO₂?are strongly dependent on its crystal phase,crystallinity,morphhology,surface area,and architecture.This makes the materials present unique properties in photocatalytic reactions.On the basis of this theory,this paper designs and synthesizes different morphology titanium dioxide by different methods,and it reveals the correspondence between photocatalytic properties and titanium dioxide nanostructures.And it clarifies the photocatalytic mechanism.Further graphene/TiO₂ composites were synthesized to study the effect of graphene addition on photocatalytic properties.TiO₂ nanomaterials were obtained via different methods.The TiO₂ nanomaterials have been prepared using TiO₂,tetrabutyl titanate?TBT?as precursors to prepare Rodlike,Flowerlike,Sphere,Cubic.SEM and TEM analysis were performed to study the morphology.The XRD and Raman data revealed a phase composition of obtained materials.The active oxidative species?·OH?produced in the supernatant liquid of the irradiated TiO₂ suspension containing terephthalic acid were investigated by measuring the fluorescence derived by the reaction with terephthalic acid.The photocatalytic activity of titanium dioxide was investigated through the decomposition of methylene blue.The results indicated that different morphology TiO₂ is a composite crystal structure of anatase and rutile.Flower-like and rod-shaped TiO₂ have the lowest electronic cavitation compound rate and the best photocatalytic performance.A series of graphene oxide/TiO₂ composites?GO/TiO₂?were synthesized.Different TiO₂and GO composite materials were prepared by hydrothermal method.It investigated doping amount GO,hydrothermal time and temperature.GO/TiO₂ composites has the best photocatalytic performance with 5 wt%GO at 180?and 12 h.The doping of GO does not affect the crystalline structure of TiO₂,but there is a chemical bond between GO and TiO₂,and TiO₂ tends to adhere to the folds of the GO layer structure.Adding TiO₂ at the same time will increase the graphation of GO and increase the disorder.It is conductived to the absorption of dyes.The composites which is 20%times than pure TiO₂ in photocatalytic efficiency.The results presented in this paper demonstrsted that graphene is a very promising candidate for development performance photocatalysts.