粉末粒径对纳米粉性能影响研究
毕业论文关键词 纳米TiO2 甲基橙 光催化 粉末粒径 降解率 催化效率
Title Explore nanoparticle size on the material performance
Abstract With the continuous development of the global industry, environmental pollution is worsening, the nano-TiO2 photocatalytic performance excellent and nano-TiO2 thin super-hydrophilic properties, and its air purification, sewage treatment, antimicrobial sterilization functional materials, as well as self-cleaning materials and other aspects of a wide range of applications. In this paper, nano-TiO2 powder under UV irradiation of methyl orange solution photocatalytic reaction assessment powdered photocatalytic properties of TiO2 to study the degradation rate of methyl orange solution and catalytic reaction time, the relationship between the powder particle size. Experiment concluded that nano-TiO2 powder in methyl orange solution also has excellent photocatalytic properties and the degradation rate of methyl orange solution with catalytic time increases, the powder particle size decreases with increasing. 5nm TiO2 powder under UV irradiation 30min degradation rate of methyl orange solution of up to 74.18%, which is due to nano-TiO2 powder has developed specific surface area,while the powder reunion will to some extent affect its photocatalytic properties.
Keywords Nano-TiO2, Methyl orange, Photocatalytic, Powde size, Degradation rate, Catalytic efficiency.
目录
1引言..1
1．1纳米材料.1
1．2纳米TiO2自清洁材料3
1．3自清洁纳米TiO2的应用6
1．4论文选题依据、研究内容.7
2实验方案..9
2．1实验准备.9
2．2实验步骤.9
3实验结果与分析12
3．1粉末状纳米TiO2的甲基橙催化及反应时间对催化性能的影响..12
3．2TiO2粉末粒径对甲基橙光催化性能的影响...14
3．3TiO2粉末与TiO2溶胶制成的薄膜的光催化效果比较..22
结论..24
致谢..25
参考文献26
1 引言 纳米材料具有的独特结构,使其表现出独特而优异的性能。虽然目前人们已对纳米材料的制备、结构与性能进行了大量的研究，但由于它是新型的材料，因此其基础理论及应用开发等方面还有大量的工作尚待进行。我国关于纳米材料和纳米技术的研究起步较晚，与发达国家相比，存在较大差距。尽管制备纳米材料的方法很多，但大多停留在实验室阶段，真正能实现工业化的很少,并且能耗大、成本高、粒径分布宽。纳米材料技术发展的结果将使人类改造自然的能力直接延伸到了分子和原子，其最终目标是宣接以原子、分子在纳米尺度上制造出具有特定功能的产品，实现生产方式质的飞跃[1]。因此，纳米科技的发展与应用将对人类社会的发展和进步产生重大而深远的影响。
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