可见光驱动的铁酸锌半导体的合成及其催化性能和机理的研究

摘要：在环境污染日益加剧的今天，半导体光催化技术应运而生。它是充分利用太阳能和治理净化环境最有前景的方法之一。传统光催化剂二氧化钛具有优良的光催化活性、出色的化学稳定性和抗光腐蚀性，是过去研究较为广泛的光催材料。然而其禁带宽度过大，对太阳光的利用率较低，严重限制了其实际应用。而纳米铁酸锌禁带宽度相对较窄，在可见光激发下，表现出明显的光催化效果。本课题主要运用水热法进行纳米铁酸锌的制备，通过调节水热法的保温时间，测定不同保温时间下制备的样品的催化降解速率，研究其对纳米铁酸锌形貌以及性能的影响。对铁酸盐的表征，主要应用了 X 射线衍射(XRD)、扫描电子显微镜（SEM）和紫外-可见光漫反射光谱分析（UV-Vis DRS）。通过循环性测试，分析铁酸锌降解染料的循环使用的性能。

关键词纳米铁酸锌半导体光催化剂水热法表征

毕业设计说明书外文摘要

Title Synthesis, Photocatalytic Performance and Mechanism ofSemiconductive Zinc Ferrite under Visible Light Irradiation

Abstract：In contemporary society, where the pollution problem has been increasingly serious, semiconductor photocatalytic technology came into being. Semiconductor photocatalytic technology is one of the most promising ways to make full use of solar energy and to solve the environmental pollution problem. Traditional titanium dioxide has excellent photocatalytic activity, chemical stability and anti-corrosive properties, which was a extensively studied photocatalyst material. However, its band gap is too wide to make the best of sunlight, which seriously limits its practical application. While the band gap of nanometer-sized zinc ferrite is relatively narrow, and it shows obvious photocatalytic activity under visible light excitation. In this paper, the preparation of nano-ferric ferrite was carried out by a hydrothermal method. The effect of duration of hydrothermal method on the morphology and properties of nanosized zinc ferrite was studied. The X-ray diffraction (XRD), scanning electron microscopy (SEM) and Ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) was employed to characterize the zinc ferrite nanoparticles. And the recycling performance was analyzed by the cycling test.

Key words nanometer zinc ferrite semiconductor photocatalyst hydrothermal characterization

1 引言 1

1.1 光催化研究背景 1

1.2 半导体光催化原理 2

1.3 铁酸锌 2

1.4 本课题主要研究内容 3

2 ZnFe 2 O 4 光催化剂的制备 4

2.1 实验原料与实验仪器 4

2.2 水热法制备纳米材料 5

2.3 实验制备过程 6

3 样品表征 7

3.1 XRD 衍射仪 7

3.2 扫描电子显微镜 7

3.3 可见光驱动的铁酸锌半导体的合成及其催化性能和机理的研究:http://www.chuibin.com/cailiao/lunwen_205649.html