摘要以 SrTiO3 为主体的光催化剂具有高效节能、无污染等优点，极具开发潜力和应 用前景。然而,目前 SrTiO3 催化剂制备工艺步骤复杂、制作成本高、成品对可见光 的利用率低等问题严重制约着它的普及。因此，制备环保且高效的 SrTiO3 复合材料 光催化剂是十分有必要的。83310

本文的主要内容是,利用水热法将 SrTiO3 ,石墨烯进行复合,制得 SrTiO3/石墨 烯纳米复合物,再使用简单沉淀法将二元复合物与 BiOI 进行复合,制得 SrTiO3/石墨 烯/BiOI 复合物, 通过扫描电镜、X 射线衍射、红外、固体紫外等方法对所制取的 纯 SrTiO3,纯 BiOI，SrTiO3/石墨烯复合物,SrTiO3/石墨烯/BiOI 复合物的结构、形 貌、光化学性质等进行表征,并通过光催化实验和电化学实验测定所制备样品的性 能,以确定其最佳配比。最终,经实验数据分析得出结论,以 SrTiO3 为主体,并与石墨 烯和 BiOI 以一定比例复合后所得的 SrTiO3/石墨烯/BiOI 复合物的光催化性能有了 显著提高。其中，石墨烯的加入可能是增加了复合物的吸附性，而 BiOI 的加入可 能使复合物的光催化活性增加。

毕业论文关键字：SrTiO3, 石墨烯, BiOI , 光催化, 电化学性能

Abstract The photocatalyst with SrTiO3 as the main body has the advantages of high efficiency, energy saving, no pollution, etc。, and has great development potential and application prospect。 However, the SrTiO3 catalyst preparation process is complex, the production cost is high, the finished product has a low utilization rate of visible light, which seriously restricts its popularity。 Therefore, it is very necessary to prepare environmentally friendly and efficient SrTiO3 composite photocatalyst。

The main content of this paper is that by hydrothermal method,  the  SrTiO3, graphene for composition and preparing the SrTiO3/ graphene nanocomposites and the binary complexes with BiOI are composite was prepared SrTiO3/ graphene /BiOI complexes, and were characterized by scanning electron microscope (SEM), X-ray diffraction, FTIR, solid state UV method for the preparation of pure SrTiO3, pure BiOI and SrTiO3/ graphene composite, SrTiO3/ graphene /BiOI  complex structure, morphology, photochemical properties and using the simple precipitation method,  and the photocatalytic and electrochemical experiments, determination of preparation of samples, to determine the best ratio。 Finally, the results of the experimental data analysis concluded that the SrTiO3 as the main body, and with graphene and BiOI to a certain proportion of the resulting SrTiO3/ graphene /BiOI  composite  photocatalytic performance has been significantly improved。 Among them, the  addition of graphene may increase the absorption of the composite, and the addition of BiOI may increase the photocatalytic activity of the complex。

Keywords: SrTiO3, Graphene, BiOI, Photocatalysis, Electrochemical properties

目 录

第一章 绪论 1

1。1  研究背景 1

1。2 光催化剂的催化原理及其应用 2

1。2。1 光催化原理 2

1。2。2 光催化的主要应用 3

1。3 SrTiO3/石墨烯/BiOI 概述 3

1。3。1 钛酸锶的概述 3

1。3。2 石墨烯的概述 4

1。3。3 碘氧化铋的概述 4

1。4 SrTiO3/石墨烯/BiOI 的制备方法 5

1。4。1 SrTiO3 的制备方法 5

1。4。2 石墨烯的制备方法