摘要近年来，环境污染愈发严重，其中尤其是水污染引起人们的广泛关注。人们经过多年尝试，发现半导体光催化剂可利用太阳能将有机污染物脱色降解，生成无毒无害物质，如CO2，H2O等。大多数科学工作者对此进行了广泛的研究。本论文以高温固相反应法和水热法两种不同的方法制备K2Ti4O9。并且使用尿素在不同反应条件下掺杂氮元素进行改性处理制备光催化剂，利用液体紫外测试其在紫外光和可见光照射下对罗丹明B的降解催化性能。利用X射线衍射以及透射、扫描电镜、红外对其结构形貌进行确认。探究了不同反应条件对最终产物的结构、形貌以及性能的影响，从而得出不同方法的优点以及缺陷以方便未来进一步改进。48041

毕业论文关键词:  半导体光催化剂；K2Ti4O9 ；光催化   

Abstract

Title   Modification and the Application Study of Potassium titanate 

Abstract

In recent years, environmental pollution has become more and more serious, especially the water pollution has aroused people's wide attention. It was found that semiconductor photocatalysis, as a“green”technology, has been widely used for the treatment of polluted water, which could degrade organic dye to CO2, H2O. In this study, potassium tetratitanate was prepared by solid-phase reaction and hydrothermal process. The nitrogen-doped photocatalyst was obtained by solid state reaction using urea as the nitrogen source. X-ray diffraction, transmission electron microscope and scanning electron microscope and infrared spectroscopy  are used to characterize the prepared materials. The photocatalytic performance of photocatalyst was performed by degradation of RhB under UV-light or visible light irradiation at room temperature. The effects of different reaction conditions on the structure, morphology and properties of the final product were explored in order to produce the optimal reaction conditions.

Keywords:  Semiconductor-photocatalyst；K2Ti4O9；photocatalytic

目   次

1 引言 3

1.1 光催化剂的发展 3

1.2半导体光催化基本原理 4

1.3 钛酸钾概述 6

1.3.1钛酸钾的结构 6

1.3.2 钛酸盐的制备方法 7

1.3.3 钛酸钾的应用以及研究现状 7

1.4 本论文主要研究内容和意义 8

2 实验材料、设备 9

2.1 实验试剂 9

2.2实验仪器 9

3焙烧温度对催化活性的影响 10

3.1 氮掺钛酸钾的制备 10

3.2 样品的表征与讨论 11

3.3光催化性能研究 13

4不同比例N元素对催化活性的影响 17

4.1氮掺钛酸钾样品的制备 17

4.2 样品的表征与讨论 18

4.3 光催化性能研究 19

5 水热法制备钛酸钾 22

5.1 水热24h制备钛酸钾 22

5.1.1 样品的制备 22

5.1.2 样品的表征与讨论 23

5.1.3 光催化性能研究