磁性纳米光催化剂的制备及其光催化性能  

Preparation of nanometer-sized magnetic photo-catalysts and their photo-catalytic activity and properties

作　　者：李新军[1] 李芳柏[2,3] 古国榜[4] 王良焱[1] 徐悦华[4] 黄琮[1] 

机构地区：[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]广东省农业环境综合治理重点实验室,广州510650 [4]华南理工大学应用化学系

出　　处：《中国有色金属学报》2001年第6期971-976,共6页The Chinese Journal of Nonferrous Metals

基　　金：广东省科技创新百项工程资助项目( 99B0 6 90 1G);广东省自然科学基金资助项目 ( 0 10 15 1);广东省科技计划资助项目(C315 0 7)

摘　　要：以Fe3 O4 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Fe3 O4 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Fe3 O4 表面的TiO2 活性低于纯TiO2 的 ,而在Fe3 O4 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。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.

关 键 词：磁性纳米催化剂 光催化性能 制备 二氧化钛 

分 类 号：TQ426[化学工程]