高热稳定性介孔ZrO2的制备及其结构稳定性研究  

Synthesis of Mesoporous Zirconia with Ultra High Thermal Stability and Investigation of Its Thermal Stability

作　　者：刘水刚[1] 马珺[1] 李军平[1] 赵宁[1] 魏伟[1] 孙予罕[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室

出　　处：《精细化工》2008年第5期421-423,427,共4页Fine Chemicals

摘　　要：该文阐述了一种催化剂(载体)的制备方法,即在非水溶剂中,通过溶胶-凝胶技术将烷氧基锆和非离子型模板剂自组装,合成出具有蠕虫状结构的介孔氧化锆。发现对凝胶适当后处理,可大大提高介孔氧化锆的热稳定性。通过XRD、TEM、等温氮吸附技术表征,表明该法合成的介孔氧化锆在600～700℃仍能很好地保持介孔结构和形貌。考察了不同后处理方式对改善介孔氧化锆热稳定性的效果,发现随着处理溶液pH升高,产物的热稳定性提高,其中,NaOH等强碱性溶液,可以使介孔氧化锆的热稳定性提高至700℃。The mesoporous zirconia with ultrahigh thermal stability was synthesized via a controllable and facile sol-gel approach. It is found that the alkaline solution post-treatment exerted a critical influence on improving the thermal stability of the product. Even after calcination at 700 ℃ for 4 h, the worm-like mesopore system was fairly preserved in the NaOH solution treated product. The effect of different post-treatment on the thermal stability of mesoporous ZrO2 was also investigated.

关 键 词：热稳定性 介孔ZrO2 后处理 功能材料 

分 类 号：TQ426.8[化学工程]