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Study on the Characterization and Application of PANI/RE2O3 （RE=Sm, Y） Nano Composite

Author: LiChangLong
Tutor: WangJun
School: Northeastern University
Course: Physical and chemical
Keywords: PANI/Sm2O3 PANI/Y2O3 Nnao materials Electrochemical catalysis Oxidization of CH3OH Energy level
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 16
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Abstract


Doped reagent of toluene-p-sulfonic acid (p-TSA) and oxidant of ammonium persulfate were used to synthesize conducting polyanline (PANI)/rare earths oxide (RE2O3, RE=Sm, Y) composites by a chemical method. SEM image was used to characterize PANI/RE2O3. Four points probes method was used to test the conductivity of these composites and researched the relationship between conductivity and morphology of composites. ICP, XRD, FT-IR, UV-Vis were used to study the structure of composites. Pt electrodes modified by PANI/RE2O3 (RE= Sm, Y) were prepared through the method of in-situ polymerization. Cyclic voltammetry (CV) was used to study the electrochemical catalysis of PANI/RE2O3 (RE=Sm, Y) to oxidation recation of CH3OH.The experiment results show that the PANI/RE2O3 (RE=Sm, Y) are nano fiber composite materials under the conditions of the p-TSA, AN, APS and RE2O3 (RE=Sm, Y) molar ratio is 1:1:1:0.1 and the temperature is 20℃. There is no cooperation with the chemical bond between PANI and RE2O3 (RE=Sm, Y). During the beginning of polymerization, a large number of granular materials to generate, the conductivity of materials is higer. Increasing over time, the gradualar materials gradually disappears, the nano fiber materials produce and tend to integrity and the conductivity tends to stability about 10"’ S·cm-1.CV experiments results indicate that electrochemical catalyze active of PANI/RE2O3 (RE =Sm, Y)/Pt to the oxidization of CH3OH is obvious. With the increase in concentration of CH3OH, oxidation peakcurrent density of CH3OH increase. The electrochemical catalyze process is dually controled by the diffusion process and dynamics of the process of dual control.According to the CV cuvers of PANI/RE2O3 (RE=Sm, Y)/Pt in 0.1 mol·L-1 H2SO4 aqueous solution, and the UV-Vis absorption spectrum of PANI/RE2O3 (RE=Sm, Y) in DMF. The Eg and energy level structure of PANI/RE2O3 (RE=Sm, Y) are calculated. These provide a theoretical basis for the application of the nano fiber materials on photoelectric conversion devices.

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