| 高活性多孔纳米TiO2的制备及协同光催化作用机理的探讨 |
| |
| 引用本文： | 姜勇,张平,刘祖武.高活性多孔纳米TiO2的制备及协同光催化作用机理的探讨[J].材料科学与工程学报,2004,22(4):584-587. |
| |
| 作者姓名： | 姜勇 张平 刘祖武 |
| |
| 作者单位： | 湘潭大学,基础力学与材料工程研究所,湖南,湘潭,411105;娄底师范高等专科学校,化学系,湖南,娄底,417000 |
| |
| 基金项目： | 国家自然科学基金
,
湖南省科技厅科研项目 |
| |
| 摘 要： | 本文采用新的合成工艺制备了一种多孔纳米TiO2粉体材料,具有很高的光催化活性,在365nm的中压汞灯幅照下,仅17分钟就使甲基橙溶液(50mg/L)的降解率达99.6%以上;实验发现,在光幅照停止后仍然存在降解的暗反应,且前快后慢;首次提出在锐钛矿型TiO2基质中,存在极少量的金红石型TiO2可产生协同光催化降解作用,有利于光催化活性的提高.
|
| 关 键 词： | TiO2 纳米材料 甲基橙 光催化作用 |
| 文章编号： | 1004-793X(2004)04-0584-04 |
| 修稿时间： | 2003年10月5日 |
Preparation of Porous Nano-TiO2 with High Activity and the Discussion of the Cooperation Photocatalysis Mechanism |
| |
| ZHANG Ping ,LIU Zu-wu ,JIANG Yong.Preparation of Porous Nano-TiO2 with High Activity and the Discussion of the Cooperation Photocatalysis Mechanism[J].Journal of Materials Science and Engineering,2004,22(4):584-587. |
| |
| Authors: | ZHANG Ping LIU Zu-wu JIANG Yong |
| |
| Affiliation: | ZHANG Ping 1,LIU Zu-wu 2,JIANG Yong 1 |
| |
| Abstract: | The material of porous nano-TiO 2 was prepared with a new preparation method, which has very high photocatalytic activity. The degradation rate of the methyl orange solutions (50mg/L) which were decomposed by nano-TiO 2 in the irradiation of the center-pressure mercury lamp at 365nm only in 17 minutes was above 99.6% . After stopping irradiation, there is a degradation dark-reaction whose reaction rate was rapid at first and slow down then. The standpoint that in the anatase TiO 2 there was thimbleful rutile TiO 2 which could bring the cooperation photocatalysis of degradation and improve its photocatalytic activity was first put forward. |
| |
| Keywords: | TiO 2 nano-material methyl orange photocatalysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
