The Photocatalytic Properties Of Titanium Dioxide And Lithium-carbon-coated Nano-doped And Research

Layered titanate nanotubes which has large specific surface area, unique tubular structure and layered structure and strong ability of ion exchange, is one of the most active research direction. The titanate nanoutes can transform into titanium dioxide nanomaterials after annealing, which has high photocatalytic ability, high charge and discharge voltage, non-toxic, good stability and safety, is often used in many apolicaitons ranging from photocatalysts, anode materials in lithium-ion battery, electrochemical capacity and solar cells.In this paper, layered protonated titanate nanotubes after ion exchange with dilute HC1were prepared by the alkaline hydrothermal method using anatase TiO2as the raw material. We have studied the phase structure, morphorogy and phase transform process at different annealing tempreture. The results show that the titanate naotube which can transform into anatase TiO2after annealing at600℃has the outer diameter of10-15nm, several micrometers length, and its morphorgy changed from nanoparticle into tubular structure.The titanium dioxide nanotubes with high thermal stability were prepared by toluene reflux using PMHS as the binding agent. We have studied the influence factors including the amout of PMHS and annealing temperature. Si-doped titanium dioxide nanotubes accompanying with carbon-coated through a CVD process were prepared. Electrochemical performance and thermal-gravematric property were examined. Electrochemical performance of Sn-doped titanium dioxide nanotubes were also evaluated.The titanium dioxide photocatysts doped by Zirconium and Niobium element respectively were successfully prepared by ion-exchange method. The morphorgy, phase structure, uv-vis property and the photocatalitic effect on dichlorophenol, rhodamine B, phenol in visible light were studied.