摘要
用反相微乳法法制备掺杂Cu2+的Ce-Zr-O2固溶体,利用X-射线粉末衍射法(XRD)和扫描电镜(SEM)对其进行了表征。结果表明,Ce-Zr-O2固溶体掺杂Cu2+形成的Ce0.45Zr0.45Cu0.1O2具有与CeO2相似的立方晶型,经1 000℃高温处理后,此晶体结构未发生变化。与未掺杂Cu2+的Ce-Zr-O2固溶体相比较,Ce0.45Zr0.45Cu0.1O2对甲苯完全氧化反应具有较高的催化活性。当反应温度达到550℃时,甲苯蒸汽能够在Ce0.45Zr0.45Cu0.1O2催化作用下全部转化为CO2,显示了良好的低温燃烧催化性能。经800℃和1 000℃高温热处理,仍具有较好的耐热稳定性。
Cu - doped Ce-Zr -O2 solid solution was prepared by inverse microemulsion method. The structurc of this sample was characterized by using the XRD and SEM. The result showed that Cu - doped Ce - Zr - O2 solid solution has similar cubic structure with CeO2 and the cubic structure can maintain after being treated at 1 000℃. Ce0.45Zr0.45Cu0.1O2 exhibits higher catalytic activity for the complete oxidation of toluene, compared with not Cu - doped Ce- Zr- O2 solid solution. Toluene can completely oxidize in the presence of Ce0.48Zr0.48Cu0.04O2 when the reaction temperature exceeds 550 ℃. Ce0.45Zr0.45Cu0.1O2 catalyst heated at 800 ℃ ,1000 ℃ respectively still has fairly good thermal stability.
出处
《辽宁化工》
CAS
2006年第12期700-703,共4页
Liaoning Chemical Industry
基金
宁夏大学科学研究基金资助项目(QN0433)
