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摘要当今社会，污染问题越来越严重，研究者们越来越关注可将太阳能充分利用的光催化技术，二氧化钛就是其中最重要的一种光催化剂。二氧化钛由于其自身性质存在缺陷：只吸收较少的紫外光，并且光激发产生的电子和空穴容易复合。为了解决这两个困难很有必要研究二氧化钛的复合材料，而纳米碳材料作为广受关注的材料，具有良好的导电性、热和化学稳定性及良好的机械性能等优点,因此可以将二氧化钛负载于一种碳材料上。但是一般的碳纤文或碳纳米管需要进过表面处理的过程才能作为催化剂载体，所以需要选择一种表面含氧基团多的碳材料。本实验选择的碳材料是由细菌纤文素水热碳化产生的水热碳，实验表征结果表明：该碳材料上有较多的含氧基团，可以让二氧化钛很好负载其表面；通过光催化实验测试，该复合纳米材料在紫外光照射下对大肠杆菌和金黄色葡萄球菌的杀菌效率远比单一的紫外杀菌效率高，而且对有机污染物甲基橙的降解率高达99%。28873
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关键词： 二氧化钛 细菌纤文素 水热碳 光催化
毕业论文设计说明书外文摘要
Title The synthesis of bacterial cellulose carbon material and the research of loading titanium dioxide.
Abstract：
In today's society, the problem of pollution is more and more serious, more and more researchers focus on the photocatalytic technology which can make full use of solar energy, titanium dioxide is one of the most important kind of photocatalyst,but there are some defects of TiO2 due to its own properties:it only absorb ultraviolet light, and light excitation generated carrier and holes is easy to compound. Therefore it is necessary to research the titanium dioxide composite material, nano carbon materials as high-profile materials, has a good electrical conductivity, thermal stability,chemical stability and good mechanical performance, etc, so the titanium dioxide can be loaded on a carbon material. But general carbon fibre or carbon nanotubes need in the process of surface treatment before as catalyst carrier, so you need to select a surface oxygen groups more carbon materials. This study selected carbon material is produced by bacterial cellulose hydrothermal carbonization hydrothermal carbon, the experimental characterization results show that more oxygen containing groups on the carbon materials can make titanium dioxide load its surface well; By photocatalytic experiment test, and the composite nanomaterials under uv irradiation on escherichia coli and staphylococcus aureus sterilization efficiency than single ultraviolet sterilization with high efficiency, The degradation of methyl orange rate as high as 99%.
Keywords： Titanium dioxide Bacterial cellulose Hydrothermal carbon
photocatalytic
目录
1 绪论 1
1.1 光催化的意义 1
1.2二氧化钛光催化的原理 2
1.3二氧化钛的结构 4
1.4 TiO2的制备方法 5
1.5 TiO2的复合材料 6
1.6 一文碳材料和水热碳材料 7
2.实验部分 8
2.1实验试剂与仪器 8
2.2制备细菌纤文素 9
2.3细菌纤文素水热合成碳材料 9
2.4水热合成碳球负载TiO2 10
2.5 光催化实验 10
2.6表征 12
3.结果与讨论 14
3.1 BC及水热碳材料表征结果 14