【摘要】 采用金属钛片和石墨分别作为阳极和阴极,氢氟酸和醋酸的混合溶液为电解液,通过阳极氧化法制备高度有序的TiO₂纳米管阵列.经过场发射扫描电子显微镜（FESEM）,X—射线电子衍射仪分别对样品的形貌,结构进行了研究.结果表明,TiO₂纳米管的尺寸,形貌都随着外加电压、反应时间的变化而变化;随着退火温度的提高,TiO₂纳米管的结构逐渐由锐钛矿相向金红石相转变.另外,我们讨论了TiO₂纳米管阵列形成机制.更多还原

【Abstract】 Highly ordered titania nanobube arrays are fabricated by anodization process. This study was carried out in an electrolyte containing HF and acetic acid. Metal Ti flake graphite were used as the anode and cathode, respectively. The TiO₂ nanobubes were characterized by field emission scanning electron microscopy （FESEM）, transmission electron microscopy and powder X—ray diffraction （XRD）. The size of titania can be controlled by changing anodizing voltage, reaction time and bath temperature. The anatase TiO₂ gradually began to transform to rutile TiO₂ with increasing the annealing temperature. In addition, a possible formation mechanism of TiO₂ nanobubes was discussed.更多还原