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摘要以传统的溶胶—凝胶法为基础，将廉价的TiCl4作为前驱体，通过N离子掺杂来实现对TiO2薄膜的改性，制备出纳米TiO2溶胶；采用浸渍提拉法成膜，制备具有良好可见光光催化性能的TiO2纳米薄膜。22961
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在不同的Ph条件下制备出纳米TiO2溶胶，在高压汞灯照射下，通过TiO2溶胶降解亚甲基蓝溶液，利用1201型UV-VIS光谱仪，检测其吸收度变化，表征掺杂纳米TiO2溶胶的光催化性能；利用室外充足的太阳光照射浸有纳米TiO2薄膜的亚甲基蓝溶液，检测纳米TiO2薄膜的光催化性能。研究表明，掺杂后的TiO2薄膜吸收光谱发生红移，从而在紫外线和可见光照条件下，都具有更加优异的光催化性能。
通过掺杂对纳米TiO2薄膜进行改性，可提高其对可见光光催化的响应性，将不易利用的太阳能转化为化学能； 经改性纳米TiO2薄膜的水接触角明显降低，展现出更优异的亲水性能。
关键词 ：TiCl4 纳米TiO2 光催化性能 N离子掺杂 亲水性
毕业设计说明书（毕业论文）外文摘要
Title Preparation and photocatalytic activity of nano-nitrogen-doped TiO2
Abstract
Nitrogen-Doped TiO2 nanocrystalline sols were synthesized basing on the traditional sol-gel method, using cheaper TiCl4 for raw material. Then we prepared TiO2 nano thin film with good visible light photocatalytic performance by means of the dip-coating method.
We prepared nano TiO2 sol samples in different Ph conditions, and detected, using 1201 UV-VIS spectrometer, the absorbance changes as with the degradation of methylene blue solution under the irradiation of the high pressure mercury lamp for 10min once, to represent the photocatalytic properties of doped nano TiO2 sol. We analyses the photocatalytic performance of nano TiO2 film infiltrate into the methylene blue solution under the enough sunlight outside . Research shows that, the absorption spectra of doped TiO2 thin films have a red shift, resulting in the more excellent photocatalytic performance Whether in the ultraviolet or visible light conditions.
By doping of the nano TiO2, its response to visible light photocatalysis
Has been improved obviously, therefore making it impossible to convert the usual sun's rays into electricity. The water contact angel of modified samples decreased substantially, indicating a better hydrophilicity than pure TiO2.
Keywords nano TiO2 nitrogen-Doped photocatalysis hydrophilicity
目 次
1 绪论 1
1．1 光催化及纳米TiO2的光催化机理 1
1．2 纳米TiO2光催化材料的优越性和局限性 2
1.2.1 优越性 2
1.2.2 局限性 2
1．3 纳米TiO2光催化剂的掺杂 3
1.3.1 掺杂机理 3
1.3.2 掺杂方式 3
1.3.3 影响因素 4
1．4 光诱导亲水性（PIH）原理 4
1.4.1 水接触角与亲水性 4
1.4.2 TiO2薄膜光诱导超亲水性作用机理分析 5
1．5 溶胶-凝胶法制备纳米TiO2溶胶 7
1．6 浸渍提拉法制备纳米TiO2薄膜 8
1．7 纳米TiO2光催化剂在环境治理方面的应用前景 8
1.7.1 水净化 8
1.7.2 空气净化 8
1．8 论文选题依据、研究内容及创新点 9
1.8.1 选题依据 9
1.8.2 研究内容 9
2 实验过程 10
2．1 纳米TiO2溶胶的制备 10