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

页码：1319 / 1326

页数：8

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