【摘要】 用水解法制备纳米 V2 O5 ,经不同温度退火处理后 ,用 XRD、TEM、DTA、IR实验手段对纳米 V2 O5 的显微结构进行表征 ,结果表明 ,在 2 90℃退火温度以下 ,形成一种与正交 V2 O5 不同的未知新相 ,该相在 2 90℃附近发生相变 ,由未知新相转变成 V2 O5 正交相。该新相内含结构水 ,对 x射线衍射有显著影响。晶体结构上与正交相相比 ,畸变严重 ,氧原子远离钒原子程度不等。新相颗粒为球状 ,平均粒径为 6— 8nm。更多还原

【Abstract】 Nanocrystalline powers V₂O₅ were prepared through hydrolysis method. Its microstructure was investigated by XRD、TEM、IR and DTA. The results show that below 290℃ temperature, an unknown new phase was formed, and at ahout 290℃, the phase transformation took place, the unknown phase was transformed into orthorhomhic phase V₂O₅. The new phase contained some strueture water OH₂, which effeeted notably on Xray diffraction. Its crystal structure, compared with the orthorhomhic phase, was different, oxygenic atoms being away from V atoms. Its particles were mainly global and average size was 6—8nm更多还原