无机空心微球含可容纳大量客体的中空部分,具有比表面积大、密度小、表面渗透能力强、稳定性好等特点,在化学、生物、材料科学和光电领域均有重要的应用,如控制释放胶囊(药物、颜料、化妆品、油墨)、催化剂及催化剂载体、分离材料、声学隔音材料以及电子学元件等。
Using polystyrene (PSt) microspheres as template which particle average diameter was 200 nanometers and PVP, vanadium sol for reacting medium, the nanoscale vanadium precursors were precipitated on the surface of microspheres. After liquid and solid separating, washing, desiccating and finally burning for precursors at 530℃ ,the hollow sphere,vanadium pentoxide with particle diameter 1 - 1.5 μm were made. The characterization of morphological properties, hollow structure and phase composition of products were analyzed using SEM, TEM and XRD. The reaction mechanism of hollow sphere vanadium pentoxide and infecting factors of experiments were studied. The results indicate that through controlling the quantity of PVP, PSt, NMP and vanadium compound can insure getting hollow sphere vanadium pentoxide when reaction time was between 5.5 and 6.5 hours and temperature was 90℃.