中文摘要：

以十六烷基三甲基氯化铵（CTAC）为模板剂,正硅酸乙酯（TEOS）为硅源,甲醇为共溶剂,氢氧化钠为催化剂,采用水热法制备出不同粒径、单一分散、高度有序的介孔SiO2微球,并利用扫描电子显微镜（SEM）对所制备的微球进行表征。考察了体系中CTAC浓度、TEOS浓度、甲醇的比率和温度等条件对所制备的SiO2微球的粒径及分散性的影响。同时采用XRD、BET、HRTEM等手段对样品进行分析表征。结果表明合成的单分散球形SiO2具有有序的六方相介孔结构,并且具有较高的比表面积。

英文摘要：

Using alkyl trimethyl ammonium chloride （CTAC） as template,tetraethyl orthosilicate （TEOS） as silica source,methanol as co-solvent,sodium hydroxide as catalyst,single scattered and highly ordered mesoporous silica microspheres with different size were synthesized by hydrothermal method,and the synthesized microspheres were characterized by SEM. The effects of the CTAC concentration,the TEOS concentration,the methanol ratio and the temperature on particle size and dispersibility of the prepared silica spheres were studied,respectively. At the same time,the synthesized samples were characterized by XRD,BET,HRTEM and other methods. The results showed that the synthesis of monodispersed spherical silica had ordered hexagonal mesoporous structure and high specific surface area.