【摘要】 用甘氨酸-硝酸盐燃烧合成法,制备La_xSr_1-xNi_1-yCo_yO₃复合氧化物的陶瓷粉末,对钙钛矿氧化物进行了XRD结构分析.在通氧或不通氧下测试氧还原和氧析出的循环伏安曲线.结果表明该氧电极具有双功能催化特性,但不完全可逆.利用汞灯作为激发光源,进行几种水溶性染料和五种混合染料光解实验,利用紫外-可见、红外以及人工神经网络光度法研究La_xSr_1-xNi_1-yCo_yO₃的催化性能.结果表明La_xSr_1-xNi_1-yCo_yO₃（x=0.7,0.9,1;y=0.3,0.75）复合氧化物都具有较强光催化特性;La_xSr_1-xNi_1-yCo_yO₃的光催化活性高于La_xSr_1-xNiO3,这与B位离子（Ni2—,Co2-）的电子构型有关;Co2+的加入可使La_xSr_1-xNiO3的光催化活性有所提高.更多还原

【Abstract】 A new combustion synthesis method, the glycine-nitrate process, has been used to prepare com- plex oxide ceramic powders of La_xSr_1-xNi_1-yCo_yO₃. A series of perovskite oxides were characterized by XRD. The cyclic voltammetry curves of oxygen reduction and oxygen release were obtained with and with- out flowing oxygen. The result shows that oxygen electrodes have bifunctional catalysis activity but it is not completely reversible. The degradation experiment of various water-soluble dyestuff and five-component mixed dyestuff was performed by photo catalytic methods. A fluorescent Hg lamp was used as irradiation source. The catalytic activity of La_xSr_1-xNi_1-yCo_yO₃ was studied with UV-Vis, IR and artificial nerve net- work and spectrophotometry. The results show that the complex oxides of La_xSr_1-xNi_1-yCo_yO₃ （x=0.7, 0.9; y=0.3, 0.75） presented evident photo catalytic activity. The La_xSr_1-xNi_1-yCo_yO₃ showed stronger activities than La0.7Sr0.3NiO3, and this is attributed to the unique electronic structure of the ion B （Ni3+, Co3+）. The results showed that adding Co2+ can sharply improve the photo-electro catalytic activity of La_xSr_1-x- Ni_1-yCo_yO₃.更多还原