Nano Titanium Dioxide Research And Catalytic Properties Of Visible Light To Metatitanic Slurry Preparation Nitrogen Doping

As Fujishima and Honda publish an article in Nature reported that Single crystal semiconductor titanium dioxide electrode can generate Hydrogen from water,Titanium dioxide photocatalyst has become popular topic.But pure TiO2is inefficiency,doping is one of the method to improve its efficiency,and N-doping is a hot research.At present,the main N-doping method is sputtering method,High temperature calcination method,Titanium alcohol saline solution, Sol-gel method and mechanochemistry method.but they are difficult to put into use in the industry Due to the complex preparation process;Looking from the existing literature,most modified titanium dioxide use titanium alkoxides as raw materials,which is expensive and flammable.in addition,although some research has developed high efficiency photocatalyst,but which can just performance in the laboratory.so Looking for a simple and suitable production of doping nanometer titanium dioxide is of great significance.(1)Against this background, This paper choose cheap and easy-get metatitanic acid as raw material,using simple structure’s urea as N-source, mixed and calcined in muffle and got N-doped TiO2.(2)Evaluate the sample’s photocatalytic activity using methylene blue as Target degradation content;found that when the ratio of metatitanic acid and urea is1:3,calcination temperature is400℃(TiO2-3N-400℃),the sample’s photocatalytic activity is the highest.Irradiated by500w long arc xenon lamp, the degradation rate of MB reached93.9%;(3)The catalyst is characterized by FT-IR,XPS,XRD,TEM,TEM,UV-Vis/DRS and BET.TEM,XRD results show anatase appear in the sample and its grain size first increases then decreases like a parabola as calcination temperature go up,at400℃the grain size is smallest;XPS,FT-IR result show N mix into TiO2’ lattice and replaced O partial.the sample’s absorption spectrum gets red-shifted Compared wit pure TiO2,and its fluorescence intensity is weaker,which means N-doping can improve TiO2’ photocatalytic activity and promote separation of electron-hole.