摘要在本文中，通过采用水热法，改变反应条件合成一系列水溶性TiO2纳米粒子。我们以Cr6+为模拟污染物，对制得的水溶性TiO2纳米粒子的光催化活性进行了探究。

实验中我们从制备条件的三个方面对水溶性TiO2纳米粒子的光催化活性进行了分析，分别是：乳酸浓度、钛源以及无机盐离子。47140

首先对乳酸浓度这一影响因素进行了分析，结果表明，添加乳酸可以明显提升水溶性TiO2纳米粒子的光催化活性，最佳浓度在0.818 mol/L，随着乳酸浓度的增加，水溶性TiO2纳米粒子的光催化活性先升高后降低。

其次对钛源种类不同进行了分析，结果表明，在所使用的四种钛源中，用钛酸正四丁酯制备的TiO2纳米粒子对Cr6+光催化反应的催化活性最高。其余的催化活性按次序为以钛酸四异丙酯为钛源的产品、以硫酸氧钛为钛源的产品及以硫酸钛为钛源的产品。

最后我们添加无机氯化物来探究各类无机盐离子对水溶性TiO2纳米粒子的光催化活性的影响。结果表明，一价、二价的阳离子以及阴离子对水溶性TiO2纳米粒子的光催化活性几乎没有影响，而高价的阳离子却有着比较大的影响。

毕业论文关键词：二氧化钛、光催化、水热法、纳米粒子、钛源、无机盐离子

Effect of preparation conditions on the water-soluble TiO2 nanoparticles and photocatalytic activity

Abstract

In this paper, by using the hydrothermal method, changing the reaction conditions synthesize a series of water-soluble TiO2 nanoparticles. We Cr6+ to simulate pollutant, the photocatalytic activity of the resulting water-soluble TiO2 nanoparticles were explored..

First, the lactic acid concentration factors were analyzed, the results show, adding lactic acid can significantly enhance the photocatalytic activity of TiO2 nanoparticles are water soluble, the optimal concentration of 0.818 mol / L, with the increase in lactic acid, water-soluble nano-TiO2 photocatalytic activity of the particles first and then decreased.

Secondly, the titanium source of different types were analyzed, the results show, the four used in the titanium source, tetrabutyl titanate being prepared TiO2 nanoparticles Cr6+ highest photocatalytic activity of the catalytic reaction. The rest of the catalytic activity in sequence as tetrabutyl titanate as titanium source products to titanyl sulfate as a source of titanium products and titanium sulfate as a source of titanium products.

Finally, we explore the impact of adding inorganic chlorides to all kinds of inorganic ions on the photocatalytic activity of TiO2 nanoparticles in a water-soluble. The results showed that the monovalent, palent cations and anions little effect on the photocatalytic activity of TiO2 nanoparticles water soluble, cationic and expensive but has a relatively large impact.

Keywords: TiO2、 Photocatalytic、 Hydrothermal、 Nanoparticles、 Titanium source、 Inorganic ions 

目录

1引言 1

1.1前景 1

1.2  TiO2的结构 1

1.2.1  TiO2三种晶型的物理性质 2

1.3 用途和功能 3

1.4  TiO2纳米粒子的合成 3

1.4.1 液相法 3

1.4.2 沉淀法 4

1.4.3 气相法 5

1.4.4 其他方法 7

1.5 研究目的 7

2实验部分 10

2.1  实验试剂与仪器