Studies on the improved thermal stability for doped ordered mesoporous γ-alumina

被引：24
|
作者：
Sun, Qianping [1 ]
Zheng, Ying [1 ,2 ]
Li, Zhaohui [2 ]
Zheng, Yong [3 ]
Xiao, Yihong [3 ]
Cai, Guohui [3 ]
Wei, Kemei [3 ]
机构：
[1] Fujian Normal Univ, Coll Mat Sci & Engn, Fuzhou 350007, Fujian, Peoples R China
[2] Fuzhou Univ, Res Inst Photocatalysis, Fuzhou 350002, Fujian, Peoples R China
[3] Fuzhou Univ, Natl Engn Res Ctr Chem Fertilizer Catalyst, Fuzhou 350002, Fujian, Peoples R China
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 15期
关键词：
SOL-GEL SYNTHESIS; THIN-FILMS; FACILE SYNTHESIS; MIXED OXIDES; ZIRCONIA; ZR; CRYSTALLIZATION; GAMMA-AL2O3; VACANCIES; ANATASE;
D O I：
10.1039/c3cp50190f
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ordered mesoporous gamma-alumina (OMA), Ce-doped, Zr-doped and Ce-Zr-codoped OMA samples were synthesized in a sol-gel system with P123 as the soft template, both salicylic acid and citric acid as the assistant templates. The results show that the incorporations of either cerium or zirconium or both are able to improve the thermal stability of OMA. The capability to preserve the structural ordering and suppress the phase transition from gamma-Al2O3 to alpha-Al2O3 at high temperature observed on the doped OMA is due to the formation of CeO2, ZrO2 or CexZr1-xO2 phase, which is capable of protecting OMA from the structural collapse by sintering and phase transition.
引用
收藏
页码：5670 / 5676
页数：7
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