Preparation and characterization of high surface area niobia, ceria-niobia and ceria-zirconia

被引：18

作者：

Brayner, R

Ciuparu, D

da Cruz, GM

Fiévet-Vincent, F

Bozon-Verduraz, F

机构：

[1] Univ Paris 07, Lab Chim Mat Divises & Catalyse, F-75251 Paris 05, France

[2] Rod Itajuba Lorena, Fac Engn Quim Lorena, Dept Mat Engn, BR-12600000 Lorena, SP, Brazil

来源：

CATALYSIS TODAY | 2000年 / 57卷 / 3-4期

关键词：

ceria-zirconia; ceria-niobia; digestion; anchoring; diffuse reflectance;

D O I：

10.1016/S0920-5861(99)00335-1

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Niobia, zirconia, ceria-niobia and ceria-zirconia oxide nanoparticles are prepared by soft chemical routes and show valuable textural properties, The pore volume and specific surface area keep significant values even after calcination at 873 K. According to DRX and STEM-EDX measurements, solid solutions are obtained in the case of ceria-zirconia, whereas separate phases are identified in ceria-niobia; in the latter case, however, W-Vis diffuse reflectance spectroscopy shows also the formation of defects (color centers) arising from a partial dissolution at the interface of the oxide phases. (C)2000 Elsevier Science B.V. All rights reserved.

引用

页码：261 / 266

页数：6

共 16 条

[1] AN UNUSUAL PROMOTION OF THE REDOX BEHAVIOR OF CEO2-ZRO2 SOLID-SOLUTIONS UPON SINTERING AT HIGH-TEMPERATURES [J].