二氧化铈纳米材料的合成及性能研究分析 化学工程与工艺专业

二氧化铈纳米材料的合成及性能研究内 容 摘 要国内外早已开始了对纳米氧化铈颗粒制备技术与性能的研究。氧化铈具有立方萤石结构。它有热稳定性高,氧气储存能力强和可以在 Ce3+和 Ce4+氧化状态之间简单的转换的特性，因此它吸引了研究者广泛的兴趣。它已广泛应用于催化剂、紫外吸收材料,氧敏感材料、固体氧化物电池材料和抛光材料等领域。氧化铈在合成氧化 CO 的催化剂上展现的性能尤为突出。液相制备方法是纳米氧化铈众多制备方法的一种，它因为制作工艺相对简单的优点在所有制备方法中脱颖而出。液相制备法很适合大规模生产,它在研究方向上的前途也可预测。本文将对上文做详细描述。AbstractPreparation technology and research progress of CeO₂ nanoparticles researched both at home and abroad.Cerium oxide has cubic fluorite structure. It has attracted extensive interest due to its high thermal stability,oxygen storage capacities, and easy conversion between Ce3+ and Ce4+ oxidation states。It has been widely used in catalyst，ultraviolet absorption material，the oxygen sensitive material，solid oxide cell material and polishing material and so on．Especially, CeO₂ have been successfully synthesized and used for CO catalytic oxidation.Kinds of preparation methods of liquid phase and their differences are especially emphasized according to the advantages of liquid phase method, which can be easily enlarged in industry, and futrue directions of research are also predicted. CeO2 have been successfully synthesized and used for CO catalytic oxidation.We will give more details about what describes below.Key: CeO₂ liquid phase method CO catalytic oxidation一、实验背景CeO₂ 属于立方晶系萤石（CaF₂）结构，晶胞中的 Ce3+按面心立方点阵排列，O2-占据所有的四面体位置，每个 Ce4+被 8 个 O2-包围，而每个 O2-则与 4 个 Ce4+配位，这样的结构中有许多八面体空隙，允许离子快速扩散。Ce 有 Ce4+和 Ce3+两种氧化态，容易发生氧化还原循环，有较强的储氧功能。[1]由于具有较大的比表面积, CeO₂ 纳米...