【摘要】 为了在TiO2纳米管表面进行贵金属纳米粒子包覆,提出了微波合成的新方法.以金红石相TiO2纳米粉体为前驱体合成了TiO2纳米管,利用X射线衍射仪(XRD)和透射电镜(TEM)考察TiO2纳米管的组成及晶型,并观察了TiO2由片状结构卷积成管状结构的过程,对TiO2纳米管的形成机理作了初步探讨.利用扫描电镜(SEM)和X射线能谱仪(EDX)对包覆Ag、Au后的纳米管形貌结构及性能进行了表征.研究结果表明,Ag、Au纳米粒子均匀负载在TiO2纳米管表面,管径为8 nm左右,纳米管管长在100~300 nm.Ag、Au纳米粒子的平均粒径分别为5.4 nm和6.2 nm,Ag、Au纳米粒子的负载量分别为8.8%和6.9%.更多还原

【Abstract】 To prepare TiO₂ nanotubes covered with noble metal nanoparticles,a novel microwave assisted technique was proposed.After TiO₂ nanotubes were synthesized using rutile TiO₂ powder as the precursor,the composition and crystal form of the TiO₂ nanotubes were analyzed by XRD and TEM,and the process of TiO₂ sheets converting into nanotubes was studied and a primary formation mechanism of TiO₂ nanotubes was discussed.The figure and property of the TiO₂ nanotube covered with Ag and Au were characterized by SEM and energy dispersive X-ray spectroscopy（EDX）. The results show that the Ag and Au nanoparticles are well dispersed on the surface of the TiO₂ nanotubes with average diameter about 8 nm and length of 100～300 nm.The average particle diameter is about 5.4 nm for Ag and 6.2 nm for Au.The metal content of the composed nanotubes is 8.8% for Ag and 6.9% for Au.更多还原