纳米La_xSr_(1-x)Cu_(1-y)Co_yO_3的制备和光电催化特性  

Preparation and Photo-electro Catalytic Properties of Nanocrystalline La_xSr_(1-x)Cu_(1-y)Co_yO_3

作　　者：林生岭[1] 徐文清[1] 周虎[1] 成烨[1] 黄春华 刘晶伟 

机构地区：[1]江苏科技大学材料科学与工程学院,江苏镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2006年第5期48-52,共5页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：江苏省船舶先进设计制造技术重点实验室(KJS03005);江苏科技大学博士启动基金(2006CL0035)资助

摘　　要：用甘氨酸-硝酸盐燃烧法制备LaxSr（1-x）Cu（1-y）-CoyO3纳米晶体复合氧化物，并用XRD、SEM、EDS以及IR对纳米晶体的晶型、晶粒大小、形貌及组成进行表征，晶体粒子是球形的，粒径在17．8-43．7nm之间，为正交和立方晶系。用活性碳为载体制备功能氧电极，采用二电极体系，测试循环伏安曲线，发现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，对水溶性染料进行光解实验，利用紫外-可见、红外以及人工神经网络光度法研究LaxSr（1-x）Cu（1-y）-CoyO3，的催化性能。结果表明：LaxSr（1-x）Cu（1-y）-CoyO3（x=0．3，0．7；y=0．3，0．7），具有较强光催化特性，该复合氧化物催化剂对含有5种染料的废水具有高效脱色作用。The composite oxide of LaxSr（1-x）Cu（1-y）-CoyO3 nanocrystalline is synthesized with the glycine-nitrate combustion method. The crystal species and grain size of LaxSr（1-x）Cu（1-y）-CoyO3 are characterized by XRD, SEM, EDS and IR measurements. SEM shows that the LaxSr（1-x）Cu（1-y）-CoyO3 grains are spherical and well dispersed. Results from analysis show that the samples belong both orthorhombic and cubic system with a size of 17.8 -43.7 nm. The activity of electrodes made by the perovskite-type catalyst dispersed on the active carbon are investigated in the tri-electrodes system by using the cyclic voltammeter curve. Results show that the oxygen electrodes have bifunctional catalyst activity and it is not completely reversible. The degradation experiment on various water-soluble dyestuff are performed with the photo catalytic method by means of a fluorescent Hg lamp as irradiation source. The catalytic activity of LaxSr（1-x）Cu（1-y）-CoyO3 is studied with UV-Vis, IR, the artificial nerve network and the spectrophotometer. The composite oxides of LaxSr（1-x）Cu（1-y）-CoyO3（x = 0. 3.0. 7 ;y = 0.3,0.7） possess evident photo catalytic activity. The composite oxide photocatalyst is an effective decoloring agent in wastewater with five kinds of dyestuff.

关 键 词：LaxSr(1-x)Cu(1-y)-CoyO3 纳米晶 复合氧化物 光催化活性 人工神经网络 

分 类 号：O643[理学—物理化学]