华清毕业设计白文帅..docVIP

本科毕业设计（论文） 题 目 掺杂TiO2纳米材料的 制备及其光催化性能 学生姓名 白文帅 学 号 201005030209 院（系） 材料与冶金工程系 专业班级 应用化学 指导教师 韩选利 时 间 2014 年 6 月 13 日  摘要 本文采用溶胶凝胶法，制备了纯TiO2及Fe掺杂、V掺杂的TiO2前躯体干凝胶，干凝胶在煅烧温度为500℃、煅烧时间为5h的条件下合成了纯TiO2、Fe掺杂、V掺杂的TiO2粉体。以亚甲基蓝溶液为模拟污染物在紫外光下进行了光催化实验，测试了掺杂元素对TiO2的光催化性能和改性效果。主要内容及结果如下： （1）利用溶胶凝胶法制备了纯TiO2和铁掺杂TiO2前躯体干凝胶，干凝胶在煅烧温度在500℃、煅烧时间为5h的条件下制备了不同铁掺杂量的TiO2粉体，掺Fe量分别为：0.01%，0.03%，0.05%，0.07%，0.1%；紫外光下下照射含Fe0.03 %的TiO2降解亚甲基蓝溶液180min其降解度可达99.5%，而纯TiO2有65.4%。 （2）利用溶胶凝胶法制备了V掺杂TiO2前躯体干凝胶，干凝胶在煅烧温度在500℃、煅烧时间为5h的条件下制备了不同钒掺杂量的TiO2粉体，掺V量分别为：0.3%，0.6%，1.0%，1.6%，3.0%；紫外光照射120min掺V1.0%的TiO2对亚甲基蓝溶液的降解度达98.7%。 结果表明：在实验条件下，掺杂Fe的摩尔分数为0.03%时，TiO2纳米粉体粒子具有较佳的光催化性能。掺杂V的摩尔分数为1.0%时，TiO2纳米粒子具有较佳的光催化性能。 关键词 : 溶胶凝胶法；铁掺杂；钒掺杂；二氧化钛；光催化；亚甲基蓝 Abstract Sol gel method is applied in this article, the preparation of a pure iron doping, vanadium, titanium dioxide and titanium dioxide before body dry gel, dry gel in calcination temperature is 500℃, burning time of 5h was synthesized under the condition of pure titanium dioxide, doped with iron and vanadium doped tio2. With methylene blue solution to simulate pollutants under uv light photocatalytic experiment was carried out, to verify the doping elements on the modification effect of titanium dioxide, and the modification mechanism is analyzed. The main results were as follows: (1) was prepared by sol gel method in pure TiO2and iron doped TiO2before body dry gel, dry gel in calcination temperature at 500℃, calcination time of 5h was prepared under the conditions of different iron doping amount of titanium dioxide powder, respectively, 0.01%, 0.03%, 0.05%, 0.07%, 0.1%; Ultraviolet light and down light containing Fe 0.03 % TiO230 min the degradation degree of degradation of methylene blue solution is 99.5%, compared with 65.4% pure TiO2。 (2) was prepared by sol gel method before body dry gel, vanadium doped TiO2xerogel in calcination temperature at 500℃, calcination time of 5h was prepared under the condition of different amount of vanad