Characterization of Mo-Sn-O system by means of Raman spectroscopy and electrical conductivity measurements

被引：14

作者：

Herrmann, JM

Villain, F

Appel, LG

机构：

[1] Inst Nacl Tecnol, Lab Catalise, BR-20081310 Rio De Janeiro, Brazil

[2] Ecole Cent Lyon, Lab Photocatalyse Catalyse & Environm, Ecully, France

[3] Univ Paris 06, Lab Chim Inorgan & Mat Mol, Paris, France

来源：

APPLIED CATALYSIS A-GENERAL | 2003年 / 240卷 / 1-2期

关键词：

molybdenum oxide; tin oxide; Sn-Mo-O systems; Raman spectroscopy; electrical conductivity;

D O I：

10.1016/S0926-860X(02)00419-2

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：

Mo-Sn-O systems were characterized by Raman spectroscopy and electrical conductivity measurements. The catalysts were obtained from precipitation of SnCl4 by ammonia in the presence of (NH4)(2)Mo7O24 using four different levels of Mo concentration. The electrical conductivity measurements showed that particles are formed by agglomeration of SnO2 crystals aggregated by polymolybdate. Raman spectroscopy suggested that four-coordinated species are dispersed at the external surface while six-coordinated species are inside the particles. For high Mo concentration (Mo > 10%), octahedral coordinated species are also on the surface. Bulk MoO3 oxide was not observed. These results confirm the model previously proposed. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：177 / 182

页数：6

共 19 条

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