Surface modification of ZrO2 nanopowder with oxovanadium species using slurry deposition and impregnation methods

被引：10

作者：

Adamski, A.

Zapala, P.

Jakubus, P.

Sojka, Z.

机构：

[1] Jagiellonian Univ, Fac Chem, PL-30060 Krakow, Poland

[2] Jagiellonian Univ, Reg Lab Physicochem Anal & Struct Res, PL-30060 Krakow, Poland

[3] Tech Univ Szczecin, Inst Chem & Environm Protect, PL-710065 Szczecin, Poland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 442卷 / 1-2期

关键词：

oxide materials; chemical synthesis; slurry deposition; impregnation; vanadium ions speciation;

D O I：

10.1016/j.jallcom.2006.07.146

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：

Structural differences in zirconia-supported vanadia, containing 3 mol% V2O5, obtained by slurry deposition and wet impregnation were elucidated using Raman, EPR and XRD methods, supported by Rietveld refinement. The preparation method strongly determines both the heterogeneity of the surface VOx species and incorporation of the V4+ ions into the zirconia matrix. Slurry deposition favors the formation of isolated or two-dimensional oxovanadium, clusters, whereas impregnation leads to agglomerated nanocrystalline V2O5. The stability of surface vanadium was discussed in terms of its reducibility and changes in the temperature of the tetragonal to monoclinic ZrO2 phase transition, induced by surface doping. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：302 / 305

页数：4

共 20 条

[1] An XRD and ESR study of V2O5/ZrO2 catalysts:: influence of the phase transitions of ZrO2 on the migration of V4+ ions into zirconia [J].