| 纳米TiO2薄膜在不同基质表面的负载及光催化性能 |
| |
| 引用本文： | 任学昌,史载锋,孔令仁.纳米TiO2薄膜在不同基质表面的负载及光催化性能[J].中国环境科学,2005,25(5):535-539. |
| |
| 作者姓名： | 任学昌 史载锋 孔令仁 |
| |
| 作者单位： | 南京大学环境学院,污染控制与资源化研究国家重点实验室,江苏,南京,210093 |
| |
| 基金项目： | 国家"863"项目(2002AA601250);高校博士学科点专项科研基金资助项目(20020284044). |
| |
| 摘 要： | 以釉面陶瓷和普通钠钙玻璃为载体,用溶胶凝胶法在其表面进行了纳米TiO2薄膜的负载.采用X射线衍射法(XRD)、扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)对薄膜进行了表征与分析.结果表明,TiO2为完全的锐钛矿型,平均粒径约为15nm;TiO2薄膜在2种载体上分布均匀,膜厚约为300nm;TiO2薄膜在釉面陶瓷表面呈连续分布,而在玻璃表面上出现了破裂现象;2种载体中的一些基质离子在TiO2薄膜均有渗透.光降解实验表明,2种载体上的TiO2薄膜对亚甲基蓝的降解均符合一级反应动力学.TiO2/釉面陶瓷催化活性大于TiO2/玻璃,该薄膜对实际生产多菌灵废水具有催化降解作用.2种载体上的TiO2薄膜重复使用20次,对亚甲基蓝的去除率降低约2%.
|
| 关 键 词： | TiO2薄膜 负载 载体 光催化降解 |
| 文章编号： | 1000-6923(2005)05-0535-05 |
| 修稿时间： | 2004年12月22 |
Load and its photocatalytic properties of nanocrystalline TiO2 thin film con two kinds of different substrate surface |
| |
| REN Xue-chang,SHI Zai-feng,KONG Ling-ren.Load and its photocatalytic properties of nanocrystalline TiO2 thin film con two kinds of different substrate surface[J].China Environmental Science,2005,25(5):535-539. |
| |
| Authors: | REN Xue-chang SHI Zai-feng KONG Ling-ren |
| |
| Affiliation: | REN Xue-chang,SHI Zai-feng,KONG Ling-ren* |
| |
| Abstract: | TiO2 nano-crystalline thin films on glazed ceramic and common soda-lime glass were prepared by sol-gel method. The films were characterized and analysed by X-ray diffraction (XRD), scanning electron micrographas (SEM) and X-ray photoelectron spectroscopy (XPS). All specimens exhibited nano-sized crystyals of the anatase phase and the crystal size was about 15nm; the TiO2 film was distributed evenly on these two kinds of carriers with thickness about 300nm, and the film distributed continuously on the surface of the glazed ceramic; but on the glass surface, the films appeared cracked phenomenon; some substrate ions in these two kinds of carriers permeated into the TiO2 thin films. Photo degradation experiment showed that the degradation of methylene blue by these TiO2 films on two kinds of carriers accorded with the first order reaction kinetics; the catalytic activity followed: TiO2/ glazed ceramic >TiO2/ glass; and the TiO2 thin films possessed the activity of catalytic degradation of Badistan wastewater produced actually; when the degradation experiment was repeated 20 times, the removal rate of methylene blue by two kinds carriers of TiO2 film was reduced about 2%. |
| |
| Keywords: | TiO_2 films load carrier photocatalytic degradation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
