CeO_2纳米颗粒修饰TiO_2纳米管阵列及其光催化性能  

CeO_2 Nanoparticles Decorated TiO_2 Nanotube Arrays and Its Photocatalytic Performance

作　　者：陆晓旺[1,2] 张作松 殷禹[1] 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164 [2]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《常州大学学报（自然科学版）》2016年第5期21-27,共7页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(21277094)

摘　　要：采用阳极氧化法在钛基底板上制备了TiO_2纳米管阵列,利用微波辅助均相沉淀法将CeO2纳米颗粒修饰到TiO_2纳米管阵列上。利用场发射扫描电镜(FESEM),能谱仪(EDS),X射线粉末衍射仪(XRD),紫外可见漫反射光谱(UV-Vis),X射线光电子能谱(XPS)等测试手段对所制备的复合材料进行表征,并对其电化学阻抗谱及光催化降解亚甲基蓝染料废水性能进行考察。结果表明:CeO_2纳米颗粒的修饰将TiO_2纳米管阵列的光响应范围拓宽至可见光区域;相对于TiO_2纳米管阵列,CeO_2/TiO_2复合纳米管阵列电荷转移阻力减小,电子-空穴的分离效率提高,载流子的传输速率较快。复合材料表现出较高的光催化活性,其在4h内对亚甲基蓝光催化降解率可达80%。TiO2 nanotube arrays were prepared by anodic oxidation method on the titanium substrate, and CeO2 nanoparticles were deposited on the TiO2 nanotube arrays by the microwave homogeneous precipi- tation method. Field emission scanning electron microscopy （FESEM）, energy-dispersive spectrometry （EDS）, X-ray diffraction（XRD） and UV-Vis diffuse reflectance spectroscopy （DRS） were used to charac- terize the nanocomposites. The electrochemical impedance spectroscopy（EIS） and the performance of pho- tocatalytic degradation of methylene blue were investigated. The results show that the CeO2 nanoparticles modification can broaden the absorption spectrum of TiO2 nanotube arrays to the visible light region, rela- tive to pure TiO2 nanotube arrays. The charge transfer resistance of CeO2/TiO2 composite nanotube arrays is decreased, the efficiency of electron-cavity separated is increased, the carrier transport rate is faster. The CeO2/TiO2 nanotube arrays photocatalyst show higher photocatalytic activity and the methylene blue deg-radation rate can reach 80% by using photocatalyst in 4 hours.

关 键 词：CeO2/TiO2复合纳米管阵列 阳极氧化法 微波辅助均相沉淀法 光催化降解 

分 类 号：TB34[一般工业技术—材料科学与工程]