Thermal stability of porous sol-gel phosphosilicates and their surface area stabilisation by lanthanum addition

被引：1
|
作者：
Falco, Lorena [1 ]
de Mendonca, Mariana van den Tempel [1 ]
Mercadal, Juan J. [1 ]
Zarubina, Valeriya [1 ]
Melian-Cabrera, Ignacio [1 ,2 ]
机构：
[1] Univ Groningen, Fac Math & Nat Sci, ENTEG, Chem React Engn, Nijenborgh 4, NL-9747 AG Groningen, Netherlands
[2] Aston Univ, Sch Engn & Appl Sci, European Bioenergy Res Inst, Aston Triangle, Birmingham B4 7ET, W Midlands, England
来源：
MATERIALS LETTERS | 2016年 / 178卷
关键词：
Sol-gel; Porous glasses; Phosphosilicate glasses; Thermal stability; Lanthanum; Sintering; IN-VITRO; ALUMINA; GLASS;
D O I：
10.1016/j.matlet.2016.04.179
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The thermal stability of porous sol-gel phosphosilicates was studied by comparing the textural features upon calcination between 400 and 550 degrees C. A significant loss of surface area and pore volume were observed; the first is due to thermal coarsening of the nanoparticles, and the pore volume reduction was ascribed to sintering of the most external nanoparticles producing less void volume. Lanthanum addition was investigated as thermal stabilizer. For the mesoporous phosphosilicate composition, lanthanum addition enhanced the surface area, showing a 45% and 50% improvement with respect to the La-free counterpart; the effect was much less visible for the macroporous composition. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：91 / 94
页数：4
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