钼酸铋光催化剂的制备及其光催化性能研究

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安徽工业大学

学士学位论文（设计）论文题目：钼酸铋光催化剂的制备及其光催化性能研究

院名：材料科学与工程学院专业：无机非金属材料工程班级：无机091 学号： 0990244229 作者：王玉龙指导教师：侯林瑞

2013年06月20日

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安徽工业大学

毕业设计(论文)任务书

课题名称钼酸铋光催化剂的制备及其光催化性能

研究

学院材料科学与工程学院

专业班级无机091

姓名王玉龙

学号099024229

毕业设计（论文）的主要内容:

近几年，光催化已经成为光化学反应的一个前沿领域，在处理各种生物难降解有机废水方面有很广阔的应用前景。如何制备能响应于太阳光的光催化剂和如何推广其实际应用成为了当今光催化研究的主攻方向。本文，以硝酸铋和钼酸钠为原料制备钼酸铋光催化剂，以亚甲基蓝染料溶液模拟染料废水，研究钼酸铋光催化剂对染料废水的催化降解效果。并研究了催化剂量对其光催化降解效果的影响。

指导教师签字：

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钼酸铋光催化剂的制备及其光催化性能研究

摘要

近几年，光催化已经成为光化学反应的一个前沿领域，在处理各种生物难降解有机废水方面有很广阔的应用前景。如何制备能响应于太阳光的光催化剂和如何推广其实际应用成为了当今光催化研究的主攻方向。当前研究主要集中在以下两个方面：一、探索高比表面积光催化材料的合成方法，提高光催化剂对废水中污染物的吸附能力，从而提高光催化材料对废水中污染物的光催化降解能力。二、选择合适的且能响应于太阳光的光催化材料，为光催化氧化的实际应用化提供可能。

本论文采用固相法制备了Bi20MoO33光催化材料，并通过XRD，SEM和UV-Vis 等测试手段对该光催化剂进行了表征。结果表明，用该法制备的Bi20MoO33光催化剂在紫外和可见光区均有较强的光吸收性能。以亚甲基兰作为被降解物质，在太阳光照射下来研究其光催化活性，发现Bi20MoO33对亚甲基兰有较强的降解作用，8 h亚甲基兰降解率达到84%。

关键词: 光催化氧化法; 钼酸铋; 光催化剂; 亚甲基蓝

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Preparation and Photocatalytic Properties of Bismuth Molydate

Photocatalyst

Abstract

In recent years, photocatalysis has been a one-up field in photochemistry, and has widely applied foreground in disposing organic waste water. Now, it is the major research direction how to synthesize the sunlight-driven photocatalysts and further apply the photocatalysts to the wastewater treatment. The current reseach is focused on the following two aspects: one is the exploring synthesis methods of photocatalysts with high specific surface areas, and promoting the adsorption properties of the synthesized phtocatalysts, and consequently promoting photocatalytic degradation activities of the photocatalysts on the pollutants; and the other is how to selecte the sunlight-driven photocatalysts and make it applicable to use photocatalytic oxidation technique in real waste water treatment.

In this paper, Bi20MoO33photocatalysts were successfully synthesized by the solid-state reaction method, and characterized by the XRD、SEM and UV-Vis technologies. Test results showed that Bi20MoO33 photocatalyst has strong photo-absorption property both in the UV region and the visible light region. The photocatalytic activity of Bi20MoO33photocatalyst had been tested on the decomposable substrate methylene blue under sunlight illumination. Test results revealed that the degradation ratio of methylene blue was up to 84% through 8 h under sunlight irradiation, which made photocatalyst have greatly potential applications.

Keywords: Photocatalytic oxidation; Bismuth molybdate; Photocatalysis; Methylene blue