磁性纳米光催化剂的制备及其光催化性能 |
| |
引用本文: | 李新军,李芳柏,古国榜,王良焱,徐悦华,黄琮. 磁性纳米光催化剂的制备及其光催化性能[J]. 中国有色金属学报, 2001, 11(6): 971-976 |
| |
作者姓名: | 李新军 李芳柏 古国榜 王良焱 徐悦华 黄琮 |
| |
作者单位: | 1. 中国科学院广州能源研究所, 2. 广东省生态环境与土壤研究所, 3. 华南理工大学应用化学系, |
| |
基金项目: | 广东省科技创新百项工程资助项目(99B06901G);广东省自然科学基金资助项目(010151);广东省科技计划资助项目 |
| |
摘 要: | 以Fe3O4为载体,制备了易于固液分离回收的磁性复合纳米光催化剂,采用SEM,元素分析,XRD等方法表征催化剂的表面形貌,晶体结构,结果表明,二氧化钛包裹在Fe3O4的表面,其包裹量越大,粒径越大,锐钛矿峰越强,利用光催化降解甲基橙的效果来考察磁性复合光催化剂的活性,直接包裹在Fe2O4表面的TiO2活性低于纯TiO2的,而在Fe3O4与TiO2之间包裹SiO2,可以有效地提高其光催化活性,其活性与纯TiO2接近。
|
关 键 词: | 磁性纳米催化剂 光催化性能 制备 二氧化钛 |
文章编号: | 1004-0609(2001)06-0971-06 |
修稿时间: | 2001-05-11 |
Preparation of nanometer-sized magnetic photo-catalysts and their photo-catalytic activity and properties |
| |
Abstract: | Innovative nanometer sized magnetic photo catalysts, which are named as TiO 2/NiPc/Fe 3O 4 or TiO 2/SiO 2/NiPc/Fe 3O 4 and are liable to be separated and recovered, were prepared using Fe 3O 4 as support. The surface morphology and crystal pattern were investigated by means of SEM, element analysis and XRD. The results showed that TiO 2 wraps on the surface of Fe 3O 4, and that the particle size and the intensity of anatase (101) peaks increased with the increase of TiO 2 content. As a probe reaction, the photo catalytic activity is evaluated by methyl orange photo oxidation. When TiO 2 directly wraps on the surface of Fe 3O 4, the photo catalytic activity is lower than that of pure TiO 2. However, when SiO 2 wraps on the surface of Fe 3O 4 at first, and then TiO 2 wraps on the surface of SiO 2, the photo catalytic activity of TiO 2/SiO 2/NiPc/Fe 3O 4 is near to that of pure TiO 2. |
| |
Keywords: | nanometer sized magnetic photo catalysts photo catalysis preparation titanium dioxide |
本文献已被 CNKI 维普 万方数据 等数据库收录! |
|