以硅藻为模板合成TiO_2微胶囊及其可见光催化性能  

Fabrication of TiO_2 Capsules Using Diatoms as a Template and Their Photocatalytic Performance

作　　者：陈志刚[1,2,3] 张玉珠[1] 钱君超[1,2,3] 王盟盟[1] 陆秋月[2,3] 

机构地区：[1]江苏大学材料科学与工程学院,镇江212013 [2]苏州科技学院江苏省环境功能材料重点实验室,苏州215009 [3]苏州科技学院化学生物与材料工程学院,苏州215009

出　　处：《机械工程材料》2015年第6期48-52,共5页Materials For Mechanical Engineering

摘　　要：通过仿生方法,以羽纹硅藻为模板,经钛盐溶液浸渍、煅烧去除模板后制得直径为10μm左右的多孔TiO2微胶囊,研究了多孔TiO2微胶囊的结构特性以及其在可见光下降解亚甲基蓝溶液的催化性能。结果表明:煅烧后得到的多孔TiO2微胶囊具有多孔结构和较大的比表面积,并含有部分生物遗留下的氮元素;多孔结构及氮元素的掺杂使得多孔TiO2微胶囊具有优良的可见光催化降解亚甲基蓝效果。Porous TiO2 capsules in diameters of 10 μm were obtained through a simple infiltration of titanium salt followed by calcination process. Microstructure characteristics of TiO2 capsules and its degradation performance of methylene blue in visible light were also studied. The results revealed that the prepared TiO2 capsules possessed porous structure, large specifi c surface area and nitrogen left by diatom. The enhancement in photocatalytic degradation performance of methylene blue could be attributed to the doped nitrogen contained in the original diatom and porous structure.

关 键 词：生物模板 硅藻 光催化降解 TIO2 氧空位 

分 类 号：O611.4[理学—无机化学]