ESR spectrum with no superfine structure confirms the presence of V 4+ and the average valence of vanadium in the product is +4.30 on the basis of TG and XPS.

 
  • 无明显精细结构的室温 ESR谱证明了 V4 +的存在 ;根据 TGA和 XPS求得产物中 V的平均化合价约为 + 4 .;3 0
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