Characterization of molybdenum and tungsten phosphates compounds prepared using ammonium phosphate salt as flux

Bulletin of The Chemical Society of Ethiopia

T. T. Chiweshe¹ 

关键词: Molybdenum;    Tungsten;    Ammonium phosphate flux;    Polyphosphates;   

DOI  :  10.4314/bcse.v33i1.10

学科分类：化学（综合）

来源: Chemical Society of Ethiopia

【 摘 要 】

Fusion of powdered molybdenum and tungsten oxide using ammonium phosphate salt as flux (ratio: 1:25 respectively) yielded soluble products which were unstable. The yellow (Mo) and purple-blue (W) solutions in deionized water, methanol and acetone decolorized within 3–5 hours. Infrared analysis of molybdenum and tungsten products revealed characteristic broad bands bearing two minor peaks in the region of 1040–1130 cm^-1 which reflects the simultaneous existence of PO₂ and PO₃ groups. SEM-EDX quantitative analysis results showed percentage weight of the identified elements in the increasing order of Mo or W 2(PO₃)₂ and tungsten oxide phosphate (WO₂(PO₃)₂), respectively.

【 授权许可】

Unknown