摘要
分别用正硅酸乙酯(TEOS)和Na2SiO3为硅源培养真核啤酒酵母、近似内孢霉酵母和黑根霉菌,进行纳米SiO2的生物沉积实验,对沉积的SiO2采用SEM、TEM、EDX、ED等测试技术进行表征。结果表明,(1)啤酒酵母沉积颗粒状SiO2纳米粒子;(2)近似内孢霉酵母沉积壳鞘状的SiO2纳米结构;(3)黑根霉菌沉积管状的SiO2纳米结构;(4)真核微生物既能利用TEOS也可以利用Na2SiO3进行矿化。说明真核微生物矿化与模板组成、表面张力、空间结构及硅营养等因素有关,为利用真核微生物矿化材料提供了有益信息。
We chose three epiphytes, Saccharomyces cerevisiae, Endomyces decipiens, Rhizopus Nigricans, with two kinds of silicon sources tetraethyl orthosilicate （TEOS） and Na2 SiO3 , to carry out the biological nanostructured SiO2 deposition via biomineralization. The samples were investigated by SEM, TEM, EDX, and ED, and the results indicate that （1）Saccharomyces cerevisiae deposited a SiO2 nano-granule; （2）Endomyces decipiens deposited a nano-shell SiO2; （3）Rhizopus Nigricans deposited a SiO2 nano-tube; （4）the epiphyte can use not only TEOS but also Na2SiO3. The epiphyte mineralization depended on surface tension, template composition, spatial structure and silicon nutrition.
出处
《应用化学》
CAS
CSCD
北大核心
2009年第5期543-546,共4页
Chinese Journal of Applied Chemistry
基金
吉林省科技厅计划项目(20030405-2)
