纳米医学与纳米技术杂志

抽象的

Solid and Liquid Synthetic Routes of Vanadium, Niobium and Titanium Nano-metal Borides

Al-Zain OA and Al-Masoudi RS

The synthetic comparison between the solid and liquid phases of metal borides was subjected to empirical investigation. The solid phase direct reaction of V₂O₅, Nb₂O₅, Ta₂O₅ with excess elemental boron in a muffle furnace at 500, 700 and 1000°C for 2, 2 and 15 hours respectively, produced a mixture (as it could be seen from the xrd patterns) of MB₂ and M₂O₅ (minimal oxides). SEM shows a superparamagnetism and Magnetic hysteresis proved that. The liquid phase reaction of Vanadium trichloride, VCl₃, with sodium borohydride, NaBH₄ (1:3 ratio), produced pure black nanocrystals and nanorods of VB₂ as it is proved by xrd. Due to some ordering difficulties of Niobium and Tantalum salts liquid phase reactions couldn't be carried out.