Raman spectroscopic studies of the thermal decomposition mechanism of ammonium metavanadate

被引：48

作者：

Twu, J ^{[1
]}

Shih, CF ^{[1
]}

Guo, TH ^{[1
]}

Chen, KH ^{[1
]}

机构：

[1] ACAD SINICA,INST ATOM & MOL SCI,TAIPEI,TAIWAN

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1997年 / 7卷 / 11期

关键词：

D O I：

10.1039/a702968c

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：

Thermal decomposition of NH4VO3 under N-2 and NH3 + H2O has been studied on a molecular level by in situ Raman spectroscopy in the temperature range 150-400 degrees C. Under N-2, the decomposition mechanism leading to formation of V2O5 has been observed to proceed via two intermediates: viz. an amorphous, transitional (NH4)(2)V4O11 and NH4V3O8. Under NH3 + H2O, a slightly different decomposition pathway, rationalized in terms of stability of intermediates, leading to the formation of V2O3 has been observed. The identification of Raman-inactive V2O3 is further supported by the formation of V2O4 and V2O5, along with monomeric vanadyl species, through oxidation of V2O3 at 400 degrees C.

引用

页码：2273 / 2277

页数：5

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