采用溶胶-冷冻干燥法制备了La1-xCaxCo0.8Ni0.2O3(x=0.1、0.2、0.3、0.4、0.5)催化剂.用X射线衍射(XRD)、比表面测定仪(BET)和扫描电子显微镜(SEM)等分析手段对催化剂的结构和形貌进行了表征,并探讨Ca2+掺杂对催化剂结构和催化活性的影响.结果表明,溶胶-冷冻干燥法可制得单一的钙钛矿型氧化物,最佳焙烧温度为600℃.Ca2+掺杂取代La3+后,当x≤0.3时,催化剂可形成单一的钙钛矿结构,x=0.4、0.5时,催化剂以钙钛矿相和CaO相共存. x=0.2、0.3时,催化剂对CO的催化活性最高(T100%=160℃).
参考文献
| [1] | Cristina Tealdi;Lorenzo Malavasi;craig A J Fisher et al.Disproportionation,dopant incorporation,and defect clustering in perovskite-structured NdCoO3[J].Journal of Physical Chemistry B,2006,110(11):5395-5402. |
| [2] | Natile MM;Ugel E;Maccato C;Glisenti A .LaCoO3: Effect of synthesis conditions on properties and reactivity[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2007(3/4):351-362. |
| [3] | BULGAN G.,梁淑惠,滕飞,姚文清,朱永法.Ce掺杂对La1-xCexCoO3催化剂的结构和催化氧化性能的影响[J].物理化学学报,2008(02):205-210. |
| [4] | Sina Sartipi;Abbas Ali Khodadadi;Yadollah Mortazavi .Pd-doped LaCoO3 regenerative catalyst for automotive emissions control[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(3/4):214-220. |
| [5] | 王海,朱永法,谭瑞琴,曹立礼.非晶态配合物法制备钙钛矿型纳米粉体催化剂及其CO催化氧化性能[J].化学学报,2003(01):13-16. |
| [6] | Shu J;Kaliaguine S .Well-dispersed perovskite-type oxidation catalysts[J].Applied Catalysis B:Environmental,1998,16:L303-L308. |
| [7] | Haifeng Huang;Yaqin Liu;Wei Tang .Catalytic activity of nanometer La_(1-x)Sr_xCoO3(x = 0,0.2)perovskites towards VOCs combustion[J].Catalysis Communications,2008(1):55-59. |
| [8] | Huang KQ.;Goodenough JB. .Wet chemical synthesis of Sr- and Mg-doped LaGaO3, a perovskite-type oxide-ion conductor[J].International Journal of Quantum Chemistry,1998(2):274-283. |
| [9] | 吴印林,王岭,李福燊,赵海燕,赵艳琴,赵英娜.溶胶-凝胶法制备La0.8Sr0.2CoO3纳米材料[J].中国稀土学报,2007(06):751-754. |
| [10] | 康振晋,姚艳红,郑兴.钙钛矿型A位掺杂复合氧化物La1-xSrxCoO3-δ的光催化活性研究[J].分子催化,2005(06):473-476. |
| [11] | 徐菁利,李树本,李茸,马建泰,任家荣,兰劲松.稀土钙钛矿型催化剂对CO催化氧化活性及表面氧种的研究[J].环境工程,2000(05):57-59. |
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%