氮掺杂TiO_2的制备及其光催化性能研究  

Study on Preparation and Photocatalytic Properties of Nitrogen-doped TiO_2

作　　者：徐宝龙[1] 王勇[1] 朱旭辉[1] 李剑平[1] 钟玉荣[1] 

机构地区：[1]烟台大学光电信息科学技术学院,山东烟台264005

出　　处：《中国粉体技术》2010年第6期1-3,共3页China Powder Science and Technology

基　　金：国家自然科学基金项目;编号:60277023;山东省自然科学基金项目;编号:Y2004A11;烟台大学博士后基金项目;编号:WL03B15

摘　　要：应用溶胶－凝胶法，以尿素和钛酸丁酯为原料制备前躯体，前躯体在500℃、焙烧3h条件下制备不同浓度掺杂氮的TiO2纳米粉体。采用X射线衍射（XRD）、扫描电镜（SEM）、能谱分析（EDS）、紫外可见光谱（UV—Vis）等分析手段对样品的物相、彤貌、成分和吸光性能进行表征。并且以亚甲基蓝溶液为模拟污染物在阳光下进行光催化实验。结果表明：样品主要为锐钛矿相二氧化钛及少量的金红石型二氧化钛，颗粒粒径小于300nm．有一定程度的团聚，样品中含有质量分数分别为0、2．99％、6．23％、11．38％的氮元素，氮掺杂样品的光谱吸收边缘红移至400～470nm。光催化实验表明：氮掺杂可以大大改善TiO2在可见光波段的光催化性能。Using urea and tetrabutyl-titanate as raw materials, the precursors were prepared by sol-gel methods, then they were calcined for 3 h at the temperature of 500℃. The TiO2 nano-partieles with different nitrogen doping concentrations were obtained. The phase, morphology, composition and spectral absorption properties of the powder were characterized and analyzed by XRD, SEM, EDS, UV-Vis etc. And the photoeatalytie experiments carried out trader sunlight with methylene-blue solution as simulate pollutant. The results showed that the samples were mainly anatase titanium dioxide with a small amount of rutile-type titanium dioxide. The particle sizes were less than 300 nm. The mass fractions of N in samples were 0, 2.99%, 6.23% and 11.38%. The absorption spectra of nitrogen-doped samples shifted to 400-500 nm. The photo-catalytic experimental results showed that nitrogen doping greatly improved the catalytic properties of TiO2 under sunlight.

关 键 词：溶胶-凝胶法 掺杂 二氧化钛 光催化 

分 类 号：TQ426.94[化学工程]