不同类型表面活性剂对铈锆固溶体性能的影响

Effect of Different Types of Surfactants on Properties of Ceria-Zirconia Solid Solutions

研究了以阳离子、非离子和阴离子表面活性剂作模板剂来制备立方氟石型晶相结构的Ce0.75Zr0.25O2固溶体,表征了铈锆固溶体的物理化学性质。结果表明,添加阳离子和非离子表面活性剂可制备出较大比表面积和较好储释氧性能的固溶体,其中以TW-80为模板剂制得的固溶体的比表面积最大(104．0 m2·g-1),储氧量最高(0．473 mmol·g-1)。

The methods for preparing cuhic fluorite-type Ce0.75Zr0.25O2 solid solutions by using cationic, nonionic and anionic surfactants as template were in vestigated and their physicochemical properties were characterized. It is found that the Ce0.75Zr0.25O2 solid solutions derived from the cationic and nonionic sur- factants-templating approaches possess larger surface areas and better oxygen storage-release behaviors, in which the TW-80 template-derived ceria-zirconia show the highest surface area (104. 0 m2·g-1) and the highest oxygen storage capacity (0.473 mmol·g-1).