摘要
The methods for preparing the H_2O_2 generating air (oxygen) electrode andthe composite electrode of photocatalyst-TiO_2/C loading on the surface of the air (oxygen)electrode were introduced. In the case of the composite electrode, the current efficiency ofelectro-generated H_2O_2 is higher than 80% (J ≤ 15 mA/cm^2). The degradation of aniline was usedas an example to measure the influence of the composite electrode and compared with the system inwhich the air (oxygen) electrode and the photocatalyst-TiO_2 were separated. The results confirmedthat the composite electrode played an active role on accelerating the degradation rate of aniline.According to the measurement of the polarization curves of composite electrode and TiO_2 photoanode, and of the adsorbing amount of aniline on the surface of the composite electrode, theprinciple of descending the recombination rate of photo-generated electron and hole and of enhancingthe oxidation rate of organic molecule was described. The mechanism about the degradation ofaniline was also discussed.
The methods for preparing the H_2O_2 generating air (oxygen) electrode andthe composite electrode of photocatalyst-TiO_2/C loading on the surface of the air (oxygen)electrode were introduced. In the case of the composite electrode, the current efficiency ofelectro-generated H_2O_2 is higher than 80% (J ≤ 15 mA/cm^2). The degradation of aniline was usedas an example to measure the influence of the composite electrode and compared with the system inwhich the air (oxygen) electrode and the photocatalyst-TiO_2 were separated. The results confirmedthat the composite electrode played an active role on accelerating the degradation rate of aniline.According to the measurement of the polarization curves of composite electrode and TiO_2 photoanode, and of the adsorbing amount of aniline on the surface of the composite electrode, theprinciple of descending the recombination rate of photo-generated electron and hole and of enhancingthe oxidation rate of organic molecule was described. The mechanism about the degradation ofaniline was also discussed.
基金
theNationalNaturalScienceFoundationofChina (No.2 0 0 710 2 6 )
