复合氧化物LaxSr1-xFe1-yNiyO3光电催化活性研究

用甘氨酸-硝酸盐燃烧法,制备纳米晶体LaxSr1-xFe1-yN iyO3,并对其进行了XRD、SEM、EDS结构分析。制备了双功能氧电极,在通氧或不通氧的条件下测试了循环伏安曲线。合成的LaxSr1-xFe1-yN iyO3复合氧化物,在汞灯激发光源下,对5种有机染料进行了脱色催化降解反应;利用红外、紫外-可见以及人工神经网络光度法研究LaxSr1-xFe1-yN iyO3的催化性能。结果表明:LaxSr1-xFe1-yN iyO3(x=0.3,0.7;y=0.1,0.25,0.6)复合氧化物具有较强光催化特性,为动力学一级反应。

Study on photo-electro catalytic activity of composite oxides LaxSr1-xFe1-yNiyO3

La_xSr_(1-x)Fe_(1-y)Ni_yO_3 nanocrystals were synthesized by glycine-nitrate combustion method.Their structures,sizes and morphologies were investigated by XRD,TEM and EDS.The oxygen electrodes of bifunctional catalysis activity have been prepared and the cyclic voltammetry curves of oxygen were obtained with and without flowing oxygen.All the composite oxide La_xSr_(1-x)Fe_(1-y)Ni_yO_3 showed catalytical activity in decolorizating of five organic dyes under irradiation of mercury lamp.The catalytical activities of La_xSr_(1-x)Fe_(1-y)Ni_yO_3 were studied with IR,UV-Vis and artificial neural network and spectrophotometry.The results showed that the complex oxides of La_xSr_(1-x)Fe_(1-y)Ni_yO_3(x=0.3 and 0.7;y=0.1,0.25 and 0.6)presented evident photo catalytic activity and La_xSr_(1-x)Fe_(1-y)Ni_yO_3 system kinetic reaction is pseudo-first order.