Research On Photocatalytic Properties Of Nano-titania Prepared By Hydrothermal Method

Nano-TiO₂ is a new type of inorganic material, which is non-toxic, stable in chemical, high oxidizing, good photoelectric transformation and photocatalytic performance. It is widely used in environmental management and solar sensitization battery, etc. Preparing nano-TiO₂, doping iron and silver, and the photodegradation methylene blue by this novel catalyst were studied.Photocatalytic properties of nano-TiO₂ have been researched, which was prepared by hydrothermal method. The tetra butyl titanate and absolute ethanol were used as starting materials to prepare nano-titanium by hydrothermal method. By controlling the reaction conditions such as raw materials, temperature, PH, etc, we have obtained nano-titanium. On the basis of characterized by XRD, SEM, and TEM, the photocatalytic activities of samples were investigated. The phase, size and morphology of product were affected by different preparation conditions. Preparation process of catalyst was further guided by photocatalytic tests. In the end, the optimum preparation parameters were obtained.In order to further expand the utilization of sunlight, we studied doped-TiO₂. Iron and silver doped-TiO₂ were respectively prepared by hydrothermal and photodeposition method. We researched photocatalytic activities of samples,which were doped with different proportion. Eventually, we got the best doping ratio.Also, doping samples showed excellent response in visible light.The novel innovation achievements of submitted are mainly as follows:(1) Doping samples also show excellent response under Hg lamp 577nm irradiation.(2) We explorative study the preraration of magnetic catalytic. The samples can be separated, and have a certain of photocatalytic effect.