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Study on Property of Eu~3+ Doped ATO Non-materials and Electrocatalysis Ability of Eu~3+ Doped Ti/SnO_ 2-Sb Electrodes

Author: HuangXiuYang
Tutor: ZhuFuLiang
School: Lanzhou University of Technology
Course: Non-ferrous metallurgy
Keywords: Eu3+ doping ATO nano-material Chemical co-precipitation method Ti/SnO2-Sb electrode thermal decomposition method
CLC: TB383.1
Type: Master's thesis
Year: 2011
Downloads: 52
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Abstract


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.

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