Preparation, Doping And Properties Of TiO 2 Ti / 2 Array Thin Films

At present, the rapid development of world economy, energy and the environment has become the main problem of the social development and human progress.Human resources of solar energy and solar energy conversion technology requirements has become more and more urgent.Semiconductor photocatalytic technology using semiconductor.While semiconductor material under the atmospheric pressure can use sunlight to degrade environmental pollutants, effectively solve the present serious environmental problems.Semiconductor photocatalysis material.The semiconductor photocatalytic technology has become the main way to solve the pollution of the environment and new energy utilization one.TiO₂ as photocatalyst due to its low cost, Gold TiO₂ as semiconductor photocatalyst in produce electron hole after exposure to the light easy to composite greatly reduce its photoelectric chemical activity.TiO₂ as the photocatalyst for the state of powder, the powder state many disadvantages exist in the real application, such as investment after the photocatalytic reaction in the solution difficult, this leads to repeated low utilization will also cause secondary pollution.To solve the problem in the application of the flaws in TiO₂, in the research of TiO₂ is mainly concentrated in two aspects, on the one hand enlarge TiO₂ absorption spectra and improve its inhibition of light after light electronic and optical born hole composite ability, and improve the utilization rate of the sun and light catalytic efficiency.On the other hand new TiO₂ photocatalyst in the application form in the application does not cause secondary pollution and improve the ability to reuse.In this article, the preparation of conductive glass FTO as base, water thermal synthesis is a one-dimensional nanostructures of rutile TiO₂ thin film on the array.When the experimental condition is too acid butyl ester dosing quantity is 0.04mol/L, 25 h reaction time, water fluid temperature 180 ℃, 400 ℃ calcination mufflefurnace 1h film formation of the rutile TiO₂ arrays are one-dimensional nanostructures.Rutile TiO₂ nanorods array film of nanorods with single crystal structure.In order to promote film material in visible light response, improve the utilization efficiency of sunlight and improve the ability of photoelectric chemical decomposition of water.Array of rutile TiO₂ thin film as substrate, the preparation of Fe₂O₃ complex array of rutile TiO₂ thin film.When ferric nitrate dosing quantity is 0.03 mol/L in the preparation of Fe₂O₃ composite rutile TiO₂ array of the modified membrane impedance test showed that composite resistance smaller, more conducive to the charge transfer and separation of electrons and holes.Linear volt-ampere tests showed that compound semiconductor materials Fe₂O₃/TiO₂ nanorods film photocurrent density compared with Fe₂O₃ nanorods film by, nearly six times 0.12 m A · cm-2.To explore the rutile TiO₂ array film application in pollutants degradation, on the basis of an array of rutile TiO₂ thin film is used to further Co doping amount of rutile TiO₂ array of film. Further on film Co doping amount of rutile TiO₂ array of methylene blue dye degradation experiment, the results showed that the amount of Co doping 2%rutile TiO₂ array film 6 hours on the degradation of methylene blue efficiency can reach 94.35%.In the repeat test Co doping array of rutile TiO₂ thin film can still keep high degradation efficiency.