纳米TiO2的制备、等离子体改性及其性能研究

【作者】 余红华；

【导师】 熊予莹；

【作者基本信息】 华南师范大学 ， 微电子学与固体电子学， 2003， 硕士

【摘要】 本论文主要研究了纳米TiO₂的制备工艺方法，寻求合适的载体和固定化技术，制备负载型纳米TiO₂薄膜光催化剂，以及利用等离子体对纳米TiO₂薄膜进行表面改性研究，探索提高纳米TiO₂光催化活性的新的有效途径。 采用溶胶-凝胶法在普通玻璃载波片和ITO导电玻璃上制备出负载型纳米TiO₂薄膜，并用UV-Vis，AFM，XRD等对纳米TiO₂薄膜的光谱特性、表面形貌、晶型及粒子大小、薄膜厚度等进行了表征。结果表明，在500℃热处理后，TiO₂晶型从无定性态转变为锐钛矿结构，且通过适当控制工艺条件，可在一定范围内调控TiO₂薄膜表面粒径大小和薄膜厚度。通过N₂／He感应耦合等离子体处理后其光催化活性有一定改善。通过适当条件的H₂微波等离子体处理后薄膜特性发生较大变化，其紫外—可见吸光能力明显增强，光致亲水性能和光催化活性都有较大提高。样品在自然光作用下可以获得表面超亲水性，能有效地降解有机物，具有较高的光催化活性。更多还原

【Abstract】 This paper mainly study on the technics of preparing nano-TiO2,seeking for the proper carrier and technics, preparing the immobilized nano-TiO2 photocatalytic film,and with the plasm surface treatment, probe the new effective way of improving the photocatalytic activty of nano-TiO2.Sol-gel method was used for preparing the nano-TiO2 photocatalytic film on general glas slid and ITO conductive glass. The spectrum property, surface image, crystlal type, particle size, thickness and other properties of this film were measured by UV-Vis, AFM, XRD and other apparatus. The result indicated that the crystlal type of film convert to anatase after 500 C treatment for 1 hour, the particles size on the film surface and film’s thickness can be adjust in some extent by properly control the technics conditions. The photocatalytic activty had been improved in a certain extent after treat with N2/He Influence Coupling Plasm. The film’s property had a great change after H2 Microwave Plasma treatment in certain conditions, especially the UV-Vis absorbtion, the hydrophilicty and the photocatalytic activty have a great improvement. The sample can achieve the superhydrophilicty and effectively degrade the organic compound in natural light.更多还原