不同条件下制备介孔二氧化硅纳米结构的扫描电镜表征

Scanning electron microscopy characterization of mesoporous silica nanostructures prepared under different conditions

以不同类型的氨基酸衍生物为模板,研究了其在不同的转速、浓度和硅源下介孔二氧化硅纳米形貌的影响。研究表明随着模板剂中碳链长度的增加,所制备的二氧化硅形貌经历了由球到棒再到片的变化;随着搅拌速度的增加,所制备的二氧化硅形貌发生了由带(片)状到球形的变化;模板剂浓度增大会导致二氧化硅纳米球的破裂;硅源对于二氧化硅纳米形貌有重要的影响。

The influences of nano-silica on microstructure prepared under different conditions were studied by using amino acid derivatives as the templates.It has been found that the alkyl chains,the stirring rate,the concentration and the silicon sources can make great influences on the morphologies of nanosilica.