以La2O3和Co(NO3)2·6H2O为主要原料,用“模板法”结合“热处理”技术制备LaCoO3超细粒子,用TG-DSC、TEM、XRD、FT-IR检测手段进行表征;以15 W紫外灯为光源,用甲基橙溶液的光催化降解测试超细粒子的催化活性.结果显示:La-Co湿凝胶经170℃真空干燥,可制得粒径小于10 nm不完全晶化的超细粒子;经800℃热处理,可得到粒径介于50 nm~ 120 nm具有一定光催化活性的斜方晶系钙钛矿型LaCoO3.
参考文献
[1] | M. Machida;K. Norimoto .The effect of SiO2 addition in super-hydrophilic property of TiO2 photocatalyst[J].Journal of Materials Science,1999(11):2569-2574. |
[2] | Chao-Yin Kuo .Prevenient Dye-degradation Mechanisms Using Uv/tio_2/carbon Nanotubes Process[J].Journal of hazardous materials,2009(1):239-244. |
[3] | J. Nieto;J. Freer;D. Contreras;R.J. Candal;E.E. Sileo;H.D. Mansilla .Photocatalyzed degradation of flumequine by doped TiO_2 and simulated solar light[J].Journal of hazardous materials,2008(1/2):45-50. |
[4] | Habibi MH;Nasr-Esfahani M;Egerton TA .Preparation, characterization and photocatalytic activity of TiO2/Methylcellulose nanocomposite films derived from nanopowder TiO2 and modified sol-gel titania[J].Journal of Materials Science,2007(15):6027-6035. |
[5] | Yasumori A.;Kameshima Y.;Hayashi S.;Okada K.;Shinoda H. .Photocatalytic and photoelectrochemical properties of TiO2-based multiple layer thin film prepared by sol-gel and reactive-sputtering methods[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2001(4):1253-1257. |
[6] | M.A.Pena;J.L.G.Fierro .Chemical structures and performance of perovskite oxides[J].Chemical Reviews,2001(7):1981-2017. |
[7] | 杨秋华,傅希贤.纳米LaMO3(M=Cr,Mn,Fe,Co)化合物的光催化氧化活性分析[J].硅酸盐学报,2003(03):254-256,261. |
[8] | 桑丽霞,傅希贤,白树林,杨秋华,王俊珍,曾淑兰.ABO3钙钛矿型复合氧化物光催化活性与B离子d电子结构的关系[J].感光科学与光化学,2001(02):109-115. |
[9] | 牛新书,茹祥莉,陈晓丽,李华,魏平涛,李自强.钙钛矿型La1-xPbxCoO3的制备及其光催化性能[J].稀土,2009(01):40-43. |
[10] | 牛新书,楚慧慧,李素娟,周建国.柠檬酸络合法制备LaMnO3及其光催化活性研究[J].稀土,2011(06):51-54. |
[11] | 郭文亮,柳召刚,王东杰,许延辉,刘海蛟.制备工艺对LaMnO3钙钛矿型催化剂性能影响的研究[J].稀土,2012(04):38-43. |
[12] | Dan Huang;Guangsheng Luo;Liming Yang;Yujun Wang .SYNTHESIS OF MESOPOROUS TiO_2 MATERIALS WITH HIGH SPECIFIC AREA USING INORGANIC ACIDS AS CATALYSTS[J].China particuology,2005(3):176-180. |
[13] | 何平,陈阳,余高奇,管飞,赵慧忠,张光德.Ce-TiOx超细粒子的模板法制备及结构研究[J].中国稀土学报,2011(04):439-444. |
[14] | Tang, CW;Wang, CB;Chien, SH .Characterization of cobalt oxides studied by FT-IR, Raman, TPR and TG-MS[J].Thermochimica Acta,2008(1/2):68-73. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%