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摘要:本论文在研究的方向为二氧化钛/炭 复合气凝胶对苯酚的光降解作用的研究，选用的催化剂为在原有制备炭气凝胶的工艺上再在已炭化炭气凝胶粉末中加入四氯化钛进行浸渍再进行炭化的方法制备得到二氧化钛/炭复合气凝胶。通过SEM扫描电镜观察样品的微观形貌，结果表明样品呈现不规则颗粒状，颗粒之间分布着间隙，表明样品具有一定的空隙。通过XRD图的显示，表现出了样品中的二氧化钛是以锐钛矿结构的形式存在，并且样品中的炭以无定形的形式存在。通过原位红外分析图可以看出样品的各官能团组成。通过紫外固体漫反射可以明显地看出样品对紫外光的吸收能力更强，对紫外光的利用率更高，从这方面也证明了样品在紫外光条件下有着更好的光催化降解能力。本文以苯酚为研究对象，通过改变光源种类，溶液PH值，样品投放量等因素对苯酚进行光催化降解实验，结果表明，样品在紫外光条件下对于中性环境下的低浓度苯酚溶液的62009
毕业论文关键词： 复合气凝胶；二氧化钛；苯酚；光催化降解
The Study on the photodegradation of phenol-doped used by Titanium dioxide Hybrid C Aerogels
Abstract: In this paper, in the direction of research is titanium dioxide / carbon composite airgel research on photodegradation of phenol, the choice of catalyst is added tetrachloride has been carbonized carbon airgel powder in the original process for the preparation of carbon airgel Preparation of titanium impregnated then carbonized to obtain titania / carbon composite airgel. By SEM scanning electron microscopy of the sample morphology, the results indicate that the sample presents irregular granular distribution of the gap between the particles, indicating that the sample has a certain gap. By showing the XRD pattern, showing a sample in the form of titanium dioxide anatase structure exists, and samples of amorphous carbon to form. As can be seen each functional group composition of the sample in situ infrared analysis chart. Diffuse apparent sample to ultraviolet light absorption capacity stronger, higher utilization of ultraviolet light, from this sample also proved under UV conditions it has better photocatalytic degradation by UV solid. Taking phenol as the research object, by changing the type of light source, the solution PH value, sample delivery and other factors of phenol photocatalytic degradation experiments, the results show that the degradation of low concentration of phenol solution neutral environment for the sample under UV conditions the effect is more significant.
Keywords: Hybrid airgel; titanium dioxide; phenol; photocatalytic degradation
目录
摘要 i
Abstract i
目录 iv
1 绪论 1
1.1.1 气凝胶的简介 1
1.1.2 气凝胶的特殊性质 1
1.1.3 二氧化钛复合气凝胶的研究进展 2
1.1.4 二氧化钛/炭复合材料的应用 3
1.1.5 国内外发展状况 4
1.1.6 苯酚的概况 5
1.2 本课题的研究目的及意义和研究内容