溶胶-凝胶法制备掺氮纳米TiO2及其光催化活性的究-毕业论文.docVIP

（2014届） 本科毕业设计（论文） 题 目 名 称： 溶胶-凝胶法制备掺氮纳米 TiO2粉体及其光催化活性研究 学 院（部）： 包装与材料工程学院 专 业： 包装工程 学 生 姓 名： 班 级： 包工083 指导教师姓名： 职称 副教授 最终评定成绩： 2014 年 5 月 摘 要 以钛酸正四丁酯为氨水为氮源无水乙醇为溶剂，采用溶胶-凝胶法制备纯Ti2粉体和N掺杂Ti2粉体，掺入的体积分数分别约为8%、21%、27%、31%，经过干燥、煅烧、研磨后得到N-Ti2光催化剂，紫外分光光度计、纳米粒度仪、XRD等手段对光催化剂N-Ti2的光谱、粒度、晶型结构光催化降解效果的测定，分析讨论了pH值、煅烧温度、N掺杂量等因素对N-TiO2制备及光催化活性的影响。 XRD分析表明在pH=4、氨水体积含量为27%、600℃煅烧50分钟时，制备的N-Ti02晶型全部为锐钛矿光催化降解实验结果表明在250W高压汞灯下光照2h，光照面积为11.88×10-3m2，Ti2加入量为20mg对亚甲基蓝10%wt溶液降解率纯Ti2为%，N-Ti2-27%为89.4%且其粒径为563nm，N掺杂能够显著提高纳米Ti2粉体的光催化活性。 关键词：溶胶凝胶法，N-Ti2，光催化活性ABSTRACT he butyl titanate was taken as a titanium carrier, ammonia as nitrogen source, ethanol as solven. By the way of Sol-gel method to get pure N-doped TiO2 and TiO2 powder. The volume of NH3·H2O was incorporation of the quality of 8%, 21%, 27%, 31%. While dried calcinated and grinded through the light after the catalyst particle size samples, the optical spectra of the N-TiO2, grain size, crystal structure and photocatalytic effect degradation of the measured could be got by UV spectrophotometer, nano-particle size analyzer, XRD catalyst and others means. Analytical discussion of the pH value, temperature, time, N doping factors and others factors contented on the preparation and photocatalytic activity of N-TiO2. XRD analysis showed that pH=4, the ammonia water content of 27%, calcining 50minutes in 600 ℃, the preparation of crystalline N-TiO2 was all of anatase; catalytic degradation of methylene blue test results showed that under high-pressure mercury lamp 250W light 2h light an area of 11.88 × 10-3m2, TiO2 added to 20mg, of methylene blue solution 10% wt degradation rate, the pure TiO2 was about 49.5%, N-TiO2-27% as the degradation rate was as high as 89