【作者】 徐璐；

【导师】 汪剑波；

【作者基本信息】 长春理工大学 ， 凝聚态物理， 2013， 硕士

【摘要】 TiO2是一种重要的无机功能材料,它在太阳能的储存与利用、光电转换、光致变色及光催化降解大气和水中的污染物等方面有着广阔的应用前景,成为重要研究的课题之一。由于柔性纳米薄膜具有高的比表面积和高的降解效果,所以在光催化领域成为关注的焦点。本文基于石棉运输方便,机械强度强,可以适应较恶劣复杂的环境等特点,采用水热合成法在柔性石棉衬底上制备了粒径为80nm左右、膜厚为3μm左右的二氧化钛薄膜,并且研究了反应温度、反应时间、硫酸钛浓度、碳酸钠浓度、不同金属离子的掺杂和掺杂浓度等生长条件对所制备出的薄膜的结构及其光催化效率的影响,分析其物理机制,并找出了相对最优降解率下的薄膜制备条件。得到以锐钛矿相为主要成分降解率可达到86%的柔性二氧化钛薄膜。更多还原

【Abstract】 TiO2is an important inorganic functional materials, its storage and use of solar energy, photovoltaic, photochromic and photocatalytic degradation of air and water pollutants and other potential applications have become one of key research topics. The titania nanotubes have greater specific surface area and stronger Adsorption ability than nanoparticles, so it is worth to pay close attention to in gas sensors, photocatalysis, photovoltaic cells and other parties.In this paper,we successfully prepared titanium dioxide film by hydrothermal synthesis method on the flexible asbestos substrate. The particle the diameter of the films is about80nm, and the thickness of the film is about3μm. Under the different growth conditions we prepared different particle sizes nanofilm.And we study on the photocatalytic efficiency changings under the different growth conditions and find out the relative optimum degradation conditions.We characterized the phase composition surface morphology and the UV absorption of the films under the different reaction conditions: reaction temperature, reaction time, the concentration of titanium sulphate, sodium carbonate concentration, different metal ion-doped, dopant concentration and irradiation time. We draw phase composed of sample is anatase, and find out the degradation rate of up to86%.更多还原