Preparation of macroporous Li2ZrO3 monoliths via an epoxide-mediated sol-gel process accompanied by phase separation

被引：6
作者：
Guo, Xingzhong [1 ]
Ding, Li [1 ]
Ren, Jing [1 ]
Yang, Hui [1 ]
机构：
[1] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
来源：
JOURNAL OF POROUS MATERIALS | 2017年 / 24卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Li2ZrO3; Macropores; Monoliths; Epoxide-mediated sol-gel; Phase separation; WELL-DEFINED MACROPORES; NANOCRYSTALLINE LITHIUM ZIRCONATE; MESOSTRUCTURED SKELETONS; CARBON-DIOXIDE; CO2; CAPTURE; POLY(ETHYLENE OXIDE); TEMPERATURE; SILICA; ABSORPTION; KINETICS;
D O I：
10.1007/s10934-017-0373-6
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Monolithic lithium zirconate (Li2ZrO3) with well-defined co-continuous macropores was successfully prepared via an epoxide-mediated sol-gel process accompanied by phase separation. Appropriate choice of poly(ethylene oxide) as a phase separation inducer and propyleneoxide as a gelation agent allows the production of continuous macroporous gel monolith. The dried gels are amorphous and tetragonal lithium zirconate (t-Li2ZrO3) precipitates firstly at 650 A degrees C. The phase transformation from t-Li2ZrO3 to monoclinic lithium zirconate (m-Li2ZrO3) initiates at 900 A degrees C and completes when elevating the calcination temperature to 1000 A degrees C. The macroporous structure is retained after heat-treatment, and the t-Li2ZrO3 monolith with porosity of 43.3% and dense solid skeletons is obtained.
引用
收藏
页码：1319 / 1326
页数：8
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