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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.
Cyanobacterial 6803 was used as a biological template to synthesize SiO2 with different morphologies by sol-gel method, and the Synechocystis 6803 and the prepared SiO2 were analyzed.The selective synthesis of monodisperse SiO2 microspheres and Hollow SiO2, the formation mechanism of different morphologies was discussed.The results showed that the morphology of SiO2 microspheres formed well and well dispersed with a narrow particle size distribution, the average particle size was 1.5μm, which could maintain the cell division stage The original appearance, amorphous state.SiO2 nanoparticles can be evenly coated on the surface of algal cells, the formation of hollow SiO2 microspheres uniform wall thickness, can maintain the morphology of algal cells confirmed hollow hollow silica and SiO2 microspheres formation mechanism is adsorption And infiltration process is different.