| 溶胶-凝胶-冷冻法制备纳米TiO2及其表征 |
| |
| 引用本文： | 向芸,杨世源,梁晓峰,李菊芬,王军霞,文忠和,陈林,徐小勇.溶胶-凝胶-冷冻法制备纳米TiO2及其表征[J].材料科学与工艺,2009,17(2):281-284. |
| |
| 作者姓名： | 向芸 杨世源 梁晓峰 李菊芬 王军霞 文忠和 陈林 徐小勇 |
| |
| 作者单位： | 向芸,XIANG Yun(萍乡高等专科学校化工系,江西,萍乡,337000;西南科技大学材料科学与工程学院,四川,绵阳,621010);杨世源,梁晓峰,李菊芬,王军霞,YANG Shi-yuan,LIANG Xiao-feng,LI Ju-fen,WANG Jun-xia(西南科技大学材料科学与工程学院,四川,绵阳,621010);文忠和,陈林,徐小勇,WEN Zhong-he,CHEN lin,XU Xiao-yong(萍乡高等专科学校化工系,江西,萍乡,337000)
|
| |
| 基金项目： | 国家自然科学基金，四川省科技厅科学基金 |
| |
| 摘 要： | 为解决纳米TiO2粉体易产生团聚的问题,采用溶胶-凝胶与冷冻干燥法制备纳米TiO2粉体.通过X射线衍射、扫描电子显微镜和紫外分光光度计对纳米TiO2粉体的物相组成、形貌和光催化活性进行了表征.实验结果表明:在400℃下所制得的TiO2纳米粉体的粒径约为6 nm,且粒度分布均匀,呈球形;所制得的TiO2纳米粉体在投加量为2 g/L时可使质量浓度为20 mg/L的甲基橙溶液在2.5 h内几乎全部降解.溶胶-凝胶与冷冻干燥法再结合阶段升温焙烧法可得到分散性好、粒径小和光催化活性好的粉体.
|
| 关 键 词： | 溶胶-凝胶-冷冻干燥 纳米TiO2 光催化活性 |
Preparation and characterization of TiO_2 nanopowders by sol-gel freeze-drying process |
| |
| XIANG Yun,YANG Shi-yuan,LIANG Xiao-feng,LI Ju-fen,WANG Jun-xia,WEN Zhong-he,CHEN lin,XU Xiao-yong.Preparation and characterization of TiO_2 nanopowders by sol-gel freeze-drying process[J].Materials Science and Technology,2009,17(2):281-284. |
| |
| Authors: | XIANG Yun YANG Shi-yuan LIANG Xiao-feng LI Ju-fen WANG Jun-xia WEN Zhong-he CHEN lin XU Xiao-yong |
| |
| Affiliation: | 1.Dept.of Chemical Engineering Pingxiang College;Pingxiang 337000;China;2.School of Material Science and Engineering;Southwest University of Science and Technology;Mianyang 621010;China |
| |
| Abstract: | In order to solve the reunion problem of TiO2nanopowders,the TiO2 nanopowders were prepared by sol-gel freeze-drying process.The phase composition,microstructure and photocatalytic activity of TiO2 nanopowders were characterized by XRD,SEM and UV-Vis.The results indicate that the mean particle size of TiO2 nanopowders prepared at 400 ℃ is 6 nm,and the TiO2 nanopowders have globose and uniform distribution.When the TiO2 addition is 2 g/L,the methyl orange solution with mass concentration of 20 mg/L can be degraded almost entirely in 2.5 h.Thus TiO2 nanopowders with better dispersibility and smaller mean particle size can be obtained by sol-gel freeze-drying process combined with phase-temperature process. |
| |
| Keywords: | sol-gel freeze-drying TiO2 nanopowders photocatalytic activities |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
