Study On Property Of Eu~3+ Doped ATO Non-materials And Electrocatalysis Ability Of Eu~3+ Doped Ti/SnO_ 2-Sb Electrodes

Antimony Doped Tin Oxide(ATO) nano-powder is a potential and transparent conductive material. It has good application prospects in many areas of industry, because of its different performance from others. Now, the preparation and application of the ATO nano-powder has become very popular all over the world, but the research on doping multivariatiate oxide appeared rarely. It was found that the ATO nano-powder doping with rare earth can improve its optical properties, catalytic proerties and gas sensitivities,and also can reduce the particle size and broaden application value of the powder. In this paper, Eu³⁺ doped ATO nano-powder was prepared by chemical co-precipitation method. The influences of Eu³⁺ doping and manufacture technology to the powders' performance were studied. All these studies can provide basis for the further research on the rare earth doped ATO nano-powder.Dimension Stable Anode(DSA) electrode has been received worldwide spread concern and applied widely in the industrial fields since it has been discovered, because of the excellcent electrocatalytic oxidization properties. Therefore the electrode need be modified in order to satisfy the different industry demands. The study was found that the electrode coating doped with rare earth can improve the stability and electrical catalytic properties. The electrode coating doped with rare earth can also expand the appilication value of the electrode in the water treatment field. In this thesis, the Eu³⁺ doped Ti/SnO₂-Sb electrode was prepared by the thermal decomposition method. The micrograph of the electrode surface, the electrode life, the element composition of different layers and the structure of the electrode were analyzed. The effects of the rare-earth doping amount and heat treatment temperature on the electrode properties were discussed.1. Using SnCl₄·5H₂O,SbCl₃ and Eu₂O₃ as raw materials, the ATO non-powder was prepared at the certain Eu³⁺ doping amount, reacation temmperature, terminal pH value and calcining temperature. The ATO nano-powder was examined by XRD and SEM to characterize the crystal structure, particle size and morphology. The conductive of the nano-powder was detected by the multimeter. The optimal preparing conditions can be obtained: Eu³⁺ doping amount, 0.5%～1%; terminal pH, 9; reaction temperature, 60℃and calcining temperature, 600～700℃. The nano-powder with Eu³⁺ prepared on optimal condition was completely crystallized with the mean resistivity of 279Ω·cm and the mean particle size of 33.6 nm. Analysis and comparison was carried out on the ATO nano-powder with or without Eu³⁺ in respect of the resistivity and particle size. The results show that Eu³⁺ doped ATO nano-powder has better performance.2. The Ti/SnO₂-Sb electrodes were prepared by the thermal decomposition method under the condition of certain Eu³⁺ doping amount and calcining temperature, using SnCl₄·5H₂O,SbCl₃ and Eu₂O₃ as raw materials and the titaniun as basal body. The electrochemical performance of the prepared electrodes was evaluated by linear sweep voltammetry(LSV) and Tafel curves. The degradation ability of the electrodes was investigated using p-nitrophenol as a target organic. The micrograph, the element composition and the structure of the electrodes'surface coating were analyzed by SEM, EDS and XRD. The results show that the optimal technological conditions were determined in this system: Eu³⁺ doping amount,1% and calcining temperature, 550℃. The electrode prepared by this condition has higher oxygen evolution potential and electrocatalysis ability, better coverage and structure of the electrode, and higher electrode life.