Abstract:

Anatase nanosized TiO₂ powders were prepared by low temperature liquid phase process using  industrial titanic solution as the starting materials . The crystal phase, the grain shape, size and distribution and the specific surface area of the nanosized TiO₂ powders were characterized by X-ray diffraction(XRD) .High Resolution Transmission Electron Microscope(HRTEM), transmission electron microscope(TEM), A-tomic Force Microscope(AFM), laser particle size test(IS)and N₂  -adsorption measurements. The photocatalytic activities of sols were evaluated by degradation of methylene blue under UV light. The experimental results showed that the prepared anatase nanosized TiO₂ powders at low temperature were well-crystallized with small particle size,high specific surface and good dispersibility. The nanosized TiO₂ sols demonstrated excellent photocatalytic activity.

Key words: nanosized TiO₂ , low temperature, anatase, industrial titanic solution

摘要： 以工业钛液为原料，通过低温液相法可以直接得到锐钛型纳米二氧化钛粉体。用 Ｘ射线衍射（ＸＲＤ）、高分辨率透射电子显微镜（ＨＲＴＥＭ）、透射电子显微镜（ＴＥＭ）、原子力显微镜（ＡＦＭ）、激光粒度仪（ＬＳ）和 Ｎ_２ －吸附脱附技术研究了制备的纳米 ＴｉＯ_２粉体的晶型、形貌、晶粒尺寸、粒径分布及比表面积。在紫外光照下对亚甲基蓝的降解，评价了溶胶的光催化活性。结果表明，在低温下制备出结晶良好、细小晶粒尺寸、高比表面积、分散性好的锐钛型纳米ＴｉＯ_２粉体粒子，且制备的 ＴｉＯ_２溶胶显示出好的光催化活性。

关键词: 纳米二氧化钛, 低温, 锐钛矿型, 工业钛液