论文总字数：20158字

摘 要

随着地球环境的恶化和资源的减少，新型能源的开发对人们来说迫在眉睫。而光能和氢能的开发成为一些研究人员的任务。所以在研究中，对于光催化分解水这一领域，半导体的研发成为了难点，而比表面积、粒径、带隙宽度等因素影响半导体的性能。以比表面为例，比表面越大，催化剂接触的反应物越多，性能越好。在本论文中介绍了光催化分解水的优势，光催化原理，光催化剂的种类以及光催化剂的制备。而本实验研究的是SrTiO3这种催化剂的制备，因为我们要制备的是大比表面的光催化剂，所以制备采用的方法是无模板法即熔盐法。实验中准备了三组样品，并加入不同温度的水溶解NaOH、KOH，目的是比较不同的温度对SrTiO3样品表面的影响。然后通过粉末X射线衍射仪（XRD）等专业的仪器进行表征，并对表征的结果进行分析。

一般来说，清洗的水的温度越高，SrTiO3颗粒表面的孔坍塌的越多，但是根据产氢实验发现，事实并不是如此，原因是温度越低，SrTiO3晶体的结晶度越低，导致内部产生很多缺陷，这些缺陷成为载流子的复合中心，导致到达半导体表面的光生载流子减少，降低了SrTiO3的催化效率。

关键词： 熔盐法 大比表面 光催化分解水

Preparation of Large Specific Surface SrTiO3 by Templateless Method

Abstract

With the deterioration of the Earth's environment and the reduction of resources, the development of new energy is imminent for people. The development of light and hydrogen energy has become the task of some researchers. For the photocatalytic decomposition of water, the catalyst research has become difficult, and the specific surface area, crystal type and other factors affect the performance of the catalyst. To the surface as an example, the greater the surface, the catalyst contact more reactants, the better performance. In this paper, the advantages of photocatalytic decomposition of water, the principle of photocatalysis, the kind of photocatalyst and the preparation of photocatalyst are introduced. The experimental study of SrTiO3 this catalyst preparation, because we have to prepare a large surface of the photocatalyst, so the preparation method is no template method that is molten salt method. Three sets of samples were prepared and the addition of NaOH and KOH in water at different temperatures was used to compare the effects of different temperatures on the surface of SrTiO3 samples. And then characterized by powder X-ray diffraction (XRD) and other professional instruments, and the results of the characterization analysis.

In general, the higher the temperature of the cleaned water, the more the collapse of the surface of the SrTiO3 particles, but it is found that the lower the temperature, the lower the crystallinity of the SrTiO3 crystal, Resulting in many defects, these defects become the carrier of the composite center, leading to the semiconductor surface to reduce the photogenerated carriers, reducing the catalytic efficiency of SrTiO3.

Key words: Molten salt method; big than the surface; water splittin;

摘 要 I

Abstract II

第一章 绪论 1

1.1 光催化剂的发现 1

1.1.1 背景 1

1.1.2 传统制氢方法 1

1.1.3 光催化剂TiO2的发现 2

1.2 关于光催化技术的其他应用 2

1.2.1 光催化降解污染物 2

1.2.2 光催化除菌 3

1.3 光解水原理 3

1.3.1 光催化分解水的条件 3

1.3.2 光解水的反应过程 4

1.4 关于SrTiO3的研究 4

1.4.1 光催化剂SrTiO3存在的缺点 4

1.4.2 关于提高SrTiO3催化性能的方法 5

1.4.3 研究进展 6

1.5 本实验目的 7

参考文献 7

第二章 实验部分 9

2.1 试剂和设备 9

2.2 实验内容 9

2.3 基本物理表征方法介绍 10

2.3.1 粉末X射线衍射分析 10

2.3.2 SEM扫描电镜分析 11

2.3.3 比表面仪 12

第三章 SrTiO3的表征及产氢性能分析 13

3.1 引言 13

3.2 X射线衍射分析 13

3.3 SEM扫描电镜分析 14

3.4 Bet分析 15

3.4.1 孔径分布 15

3.4.2 吸附脱附 15

请支付后下载全文，论文总字数：20158字