【作者】 黄娟茹；

【导师】 李明伟；

【作者基本信息】 天津大学 ， 化学工程， 2007， 硕士

【摘要】 二氧化钛材料在太阳能利用、环境保护等领域具有广阔的应用前景。本文应用溶胶-凝胶技术制备不同掺杂类型的二氧化钛纳米微晶,包括纯态、Fe-TiO₂、Co-TiO₂、S-TiO₂、C-TiO₂掺杂以及Fe-Co-TiO₂、C-S-TiO₂共掺杂纳米微晶。采用热重分析、红外分析、X射线衍射、扫描电镜等现代化分析测试手段,表征产品的结构和性能,讨论制备条件对产品性能的影响,从而优化制备工艺条件。溶胶-凝胶技术制备Fe-TiO₂、Co-TiO₂、S-TiO₂、C-TiO₂掺杂以及Fe-Co-TiO₂、C-S-TiO₂共掺杂纳米微晶受到多种因素的影响:胶凝剂种类,胶凝剂的加入量,加水量,溶剂加入量,pH值,水解温度、煅烧温度和时间等。本文主要对二氧化钛纳米微晶的金属掺杂和非金属掺杂进行了深入研究。金属掺杂制成Fe-TiO₂、Co-TiO₂以及Fe-Co-TiO₂的纳米微晶和非金属掺杂制成S-TiO₂、C-TiO₂以及C-S-TiO₂的纳米微晶。运用XRD分析测试手段研究掺杂对粒径及晶型结构的影响,从而分析对微晶性能的影响;运用扫描电镜观察颗粒形貌及从能谱中分析元素含量;另外,运用红外分析样品的掺杂组成。更多还原

【Abstract】 Titanium dioxide is a promising photocatalyst which can be used in many areas, such as utilization of solar energy and environment protection. In this work, different types of titanium dioxide nanocrystallites, including Fe-titanium dioxide, Co-titanium dioxide, S-titanium dioxide, C-titanium dioxide and Fe-Co-titanium dioxide, C-S-titanium dioxide, were prepared using the sol-gel technology. The microstructures and characteristic of the products were studied by the help of thermogravimetry(TG), differential thermoanalysis(DTA), X-ray diffraction(XRD), scanning electron microscope (SEM) etc, and the reaction conditions were optimized.The influences of different preparative conditions, including kinds and quantities of depressor, temperatures of hydrolyzation, value of pH, on the properties of products were studied and discussed.In this work, metal-doped and nonmetal-doped titanium dioxide were studied, among which metal-doped nanocrystallites primarily included Fe-titanium dioxide, Co-titanium dioxide and Fe-Co-titanium dioxide; And among which nonmetal-doped nanocrystallites included S-titanium dioxide, C-titanium dioxide and C-S-titanium dioxide. We can analyse diameters and structures of grain by XRD, accordingly concluding the performances of nanocrystallites; At the same time, we can also analyse the characteristics of grain by SEM and element contents by EDX; In addition we can deduce nanocrystallites element compose by IR.更多还原