模板结合醇热法制备CeO_2及其光催化性能研究  

Preparation and Photocatalytic Property of CeO_2 Derived from a Combined Template and Alcohol-thermal Method

作　　者：陈鹏飞[1] 吴强[1] 张利[1] CHEN Pengfei WU Qiang ZHANG Li(School of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, Chin)

机构地区：[1]上海电力学院环境与化学工程学院,上海200090

出　　处：《上海电力学院学报》2016年第6期552-556,共5页Journal of Shanghai University of Electric Power

摘　　要：为了开发一种既能提高光催化材料的催化活性又能解决其固定化难题的制备方法,采用了化学气相沉积法,以甲烷为碳源,金属镍为催化剂,在550℃的条件下合成了固化在SiO_2纤维的纳米碳纤维.然后以碳纤维为模板,以硝酸铈为前驱物,通过醇热反应合成得到了固化在SiO_2纤维的CeO_2.通过X射线衍射、场发射扫描电镜和固体紫外-可见吸收光谱对CeO_2进行了表征.结果表明,所制得的CeO_2为萤石型立方结构,其禁带宽度约为2.7 e V,对亚甲基蓝溶液有优异的光催化降解效果.To develop a preparation method that not only enhances the catalytic activity but also helps to solve the immobilization problem for a photocatalytic material, carbon nanofibers are syn- thesized on silica fiber at 550 ℃ via chemical vapor deposition technique by using Ni as the catalyst and methane as the carbon source. Then a series of CeO2 is successfully formed via a CNFs template-assisted alcohol-thermal procedure. The samples thus prepared are characterized by X-Ray diffraction ,field emission scanning electron microscopy, and ultraviolet-visible diffuse reflectance spectroscopy. It turns out that the CeO2 thus prepared has cubic fluorite-type structure. The band gap is calculated to be about 2.7 eV, and the photocatalytic degradation of methylene blue （MB） is effective for the CeO2 samples thus prepared.

关 键 词：纳米碳纤维 醇热法 模板法 氧化铈 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O643.3[理学—物理化学]