Papers by Keyword: Water Decomposition

Abstract: In order to evaluate the feasibility of tritium recovery from tritiated water by thermochemical decomposition using ZrNi5, the kinetics of reaction between ZrNi5 and water vapor was studied by thermogravimetric method in the temperature range from 673K to 823K. The result shows that reaction rate increased significantly with the increasing of temperature and H2O concentration; the reaction mechanism for ZrNi5 can be described by the first-order chemical reaction, and the reaction is first order for H2O concentration. The reaction activation energy of ZrNi5 is 55.8kJ/mol calculated from the Arrhenius equation.

Abstract: P-type semiconductor SrCu₂O₂ was synthetized by semi-wet method. The precursor was analyzed by TGA and the calcined samples SrCu₂O₂ were characterized using XRD and SEM. N-P heterogeneous complex CdO/SrCu₂O₂ and WO₃/SrCu₂O₂ were prepared using equal volume impregnation method. The photocatalylic activity of SrCu₂O₂, CdO/SrCu₂O₂, WO₃/SrCu₂O₂, CdO and WO₃ under ultraviolet light irradiation was investigated. The experimental results showed that SrCu₂O₂, CdO and WO₃ did not exhibit any activity when they were used alone, but CdO/SrCu₂O₂ and WO₃/SrCu₂O₂ were efficient photocatalysts for water decomposition to hydrogen. The conclusion could be drawn that the combination of N-type semiconductor and P-type semiconductor is very important for the photocatalysis.

Abstract: We synthesized Sr0.7La0.2[ ]0.1Bi2Ta2O9 (SBTL , [ ] vacancy), and measured their photocatalytic activity for water decomposition under UV light irradiation after acid treatment. They showed the high photocatalytic activity under UV light irradiation (H2 evolution (213μmol / h) , O2 evolution (82μmol / h)).