以集胞藻6803为生物模板制备二氧化硅中空微球  

Preparation of Hollow Silica Microspheres with Synechocystis sp.PCC 6803 as Bio-template

作　　者：张博[1,2] 任天瑞[1,2] 吴青海[1,2] 王全喜[2] 冯浩[3] 

机构地区：[1]教育部资源化学重点实验室 [2]上海师范大学生命与环境科学学院,上海200234 [3]中国科学院水利部水土保持研究所,陕西西安712100

出　　处：《过程工程学报》2011年第1期107-112,共6页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:20872093);国家高技术研究发展计划(863)基金资助项目(编号:2006AA100204);国家科技支撑基金资助项目(编号:2011BAE06B06);上海市科委重点基金资助项目(编号:08JC1416800);上海市教委基金资助项目(编号:08ZZ68;11ZZ122);上海市重点学科基金资助项目(编号:S30406)

摘　　要：以蓝藻类的集胞藻6803为生物模板,用溶胶凝胶法合成了不同形貌的SiO2,并对集胞藻6803和所制SiO2进行了分析.建立了选择性合成单分散SiO2微球和空心SiO2的反应条件,探讨了不同形貌材料的形成机理.结果表明,形成的SiO2微球形貌规整,分散良好,粒径分布较窄,平均粒径为1.5μm,能保持细胞分裂阶段的原貌,呈无定型态.SiO2纳米粒子能均匀包覆在藻细胞表面,形成的空心SiO2微球壁厚均一,能保持藻细胞的形貌.证实了空心SiO2和SiO2微球形成机理是吸附和渗透过程不同.Silica particles with different morphologies were prepared using cyanobacteria Synechocystis sp.PCC 6803 as a biotemplate via a sol-gel route.The Synechocystis sp.PCC 6803 and as-prepared silica were characterized.The reaction conditions of selective synthesis of monodisperse silica and hollow silica microspheres were established.The formation mechanism of different morphologies was discussed.The results indicated that the silica microspheres had an amorphous structure with an average diameter of 1.5 m,and retained the original morphology of the cells.SiO2 nanoparticles could be uniformly coated on the surface of cells to form the hollow SiO2 microspheres,which had uniform wall thickness and could maintain the original morphology of cells.It was confirmed that the formation mechanisms of SiO2 hollow spheres and SiO2 microparticles were based on the difference between adsorption and penetration.

关 键 词：生物模板 集胞藻6803 SIO2微球 空心SiO2 

分 类 号：O632.5[理学—高分子化学] TQ314.24[理学—化学]