Perovskite La_1-xCe_xNiO₃Nanometer Powder Preparation And Study On Photocatalytic Performance

In this paper, a series of perovskite oxides LaNiO₃and La_1-xCe_xNiO₃by Complexmethod of citric acid were prepared. They were studied on the pattern,sizes and surfaceof particles and valance of cerium Ce and lanthanum La by means of IR,XRD,TEM,BET,XPS, etc. XRD pattern of La_1-xCe_xNiO₃showed that La_1-xCe_xNiO₃havethe structure of perovskite. TEM micrograph of sample indicated that as-preparedLa_1-xCe_xNiO₃was irregular particles with means size100nm and XPS analysis showedthe main valance of cerium Ce was+4and lanthanum La was+3. in the oxidate,thereare two kinds of oxygen atom,which include adsorptional oxygen and crystal latticeoxygen.Multipoint BET showed that the surface area data of La_1-xCe_xNiO₃is4.91m2/g.In the homemade open light catalytic reaction device, Photocatalysis experimentstested the reactiveness of La_1-xCe_xNiO₃particles as photocatalyst prepared in my lab.Sun-Light was photosource, and methyl orange,alizarin red,alizarin yellow,xylenolorange etc were organic reactive solution. It’s catalyst reactiveness was investigatedfrom dyes solution initial concentration, pH of the solution, La_1-xCe_xNiO₃amount andreacting temperature. By compared with the LaNiO₃photocatalytic oxidation on abovedyes, the doping effect on photocatalytic activity of La_1-xCe_xNiO₃was discussedaccoding to the result of IR and UV spectrum. The results showed that after doping thephotocatalytic activity of LaNiO₃was significantly improved.