利用高温固相反应法和溶胶-凝胶法制备了La0.75Sr0.25Cr0.5Mn0.5O3钙钛矿复合氧化物粉体. 采用XRD, TEM对粉体物相组成及颗粒形貌进行表征, 并以制备的两种粉体作为敏感材料分别制成管状传感器, 测试了其NO2气敏性能. 结果表明: 采用高温固相反应法和溶胶-凝胶法在不同焙烧温度下, 均可制得单相La0.75Sr0.25Cr0.5Mn0.5O3粉体, 采用溶胶-凝胶法在800 ℃焙烧2 h得到的粉体粒径约为20 nm;传感器输出电动势信号对NO2浓度之间呈良好的线性关系;溶胶-凝胶法制得粉体的气敏性能优于高温固相反应法制得粉体的气敏性能.
参考文献
| [1] | 牛新书,曹志民.钙钛矿型复合氧化物光催化研究进展[J].化学研究与应用,2006(07):770-775. |
| [2] | 翁端,吴晓东,徐鲁华,丁红梅,陈震.Effect of Sr and Ce on Synthesis of Nanometer Perovskite LaMnO3+λ[J].稀土学报(英文版),2003(01):46-50. |
| [3] | Weng D;Wu X;Xu L .Effect of Sr and Ce on synthesis of nanometer perovskite La0.7Sr0 3MnO3+x[J].Natural Science Progress,2002(12):82. |
| [4] | Guido Saracco;Giovanni Scibilia;Antonio Iannibello;Giancarlo Baldi .Methane combustion on Mg-doped LaCrO_3 perovskite catalysts[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,1996(2):229-244. |
| [5] | Davide F;Lucio F.Methane combustion on some perovskite like mixed oxides[J].Applied Catalysis B:Environmental,1998(16):119. |
| [6] | Seiyama T.Toal oxidation of hydrocarbons on perovskite oxides[J].Catalysis Review:Science and Engineering,1992(34):281. |
| [7] | 陈爱平;马建新;方明;刘毅庭 .钙钛矿材料在CO还原SO2催化脱硫中的应用[J].催化学报,1998,19(04):320. |
| [8] | Gysling H J;Monnier J R;Apai G .Synthesis characterization and catalyticactivity of LaRhO3[J].Journal of Catalysis,1987,103(02):407. |
| [9] | Klimisch R H;Larson J G.The Catalytic Chemistry of Nitrogen Oxides[M].New York:Plenum Press,1975:215. |
| [10] | Rojas M L;Fierro J L G;Tejuca L G;Bell A T .Preparation and characterization of LaMn1-xCuxO3+x perovskite oxides[J].Journal of Catalysis,1990,124:41. |
| [11] | 祁景玉.X射线结构分析[M].上海:同济大学出版社,2004 |
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