摘要
以硅酸钠、硫酸钛和硫酸铝为反应物,采用水热法合成产物前驱体,然后经过高温烧结,制得SiO2∶TiO2摩尔比为1∶0.05~0.7的系列硅铝胶固载TiO2介孔光催化材料（TiO2/MSA）.借助XRD小角度衍射、透射电子显微镜TEM、红外光谱FT-IR等现代测试手段,对所得材料进行了微观结构表征和介孔结构观察,并研究了负载量、pH值及烧结温度等条件对介孔结构状态和光催化性能的影响.所得结果表明,在实验范围内TiO2/MSA材料具有良好的锐钛矿型TiO2晶体结构,且随负载量的增加结晶程度增强;介孔结构和光催化性能则随着烧结温度的提高和负载量的增加呈现先增强后减弱的趋势;酸性条件有利于锐钛矿结晶结构的形成,强化了光催化性能.
With Na2SiO3,Ti（SO4）2and Al2（SO4）3as starting reactants,a set of mesoporous photocatalytic TiO2 materials（TiO2/MSA）with SiO2/TiO2 mole ratio of 1∶0.05~0.7and with silica-alumina carrier were prepared through hydrothermal method prior to final calcining procedure in this paper.By means of small angle XRD,TEM and FT-IR measurements,the microstructure and the mesoporous configuration of the final products were examined and characterized.The effects of TiO2 loading amount,pH value and sintering temperature on mesoporous configuration and photocatalytic performance were also investigated.The obtained results show that the final TiO2/MSA materials have well-crystalline anatase octohedrite structure which is promoted with the increase of the TiO2 amount loaded.The mesoporous configuration and photocatalytic properties are firstly strengthened and then weakened with the increase of sintering temperature and the amount of TiO2 loaded.It also shows that acidic conditions is suitable to the formation of anatase crystals and to the enhancement of photocatalytic properties.
出处
《陕西科技大学学报（自然科学版）》
2015年第2期34-39,59,共7页
Journal of Shaanxi University of Science & Technology
基金
国家自然科学基金项目(51171096)
陕西省科技厅自然科学基金项目(2014JM6233)
关键词
硅铝固载TiO2
锐钛矿晶相
介孔结构
光催化性能
TiO2 carried on silica-alumina
anatase
mesoporous configuration
photocatalytic property
作者简介
张超武（1958-），男，陕西兴平人，教授，博士，研究方向：功能材料、环境材料
