生物矿化合成纳米管状SiO_2

Synthesis of SiO_2 Nanostructured Materials by Biomineral Method

生物体利用生物矿化作用,在有机分子模板上,通过蛋白和多糖生物分子的诱导及有机-无机界面分子识别自组装合成物貌形态可控的固态SiO2结构。本文以真核生物细胞根霉菌为模板,以正硅酸乙酯(TEOS)作为硅源进行了生物矿化实验,并采用TEM、SEM、FTIR、XPSEDX、TGA等手段对实验结果进行了表征。结果表明,TEOS/培养基浓度为80mg·L-1时,矿化合成了一种厚度为5nm的管状SiO2纳米结构材料。

According to Biomineralization,the formation of solid silica with controlled morphologies occurs on organic molecular templates,and it is directed by proteins and polysaccharides and organic-inorganic interfacial molecular recognition. One kind of material was biominerally synthesized by means of the lower Rhizopus Nigricans as cell templates and TEOS as Si nutrition. The samples were investigated by TEM ,SEM,FTIR,XPS,EDX,TGA and massive experimental data were obtained. Results show that when the concentration of TEOS is 80 mg·L^-1, in the Rhizopus Nigricans cell wall, the tube-like nanostructured SiO2 is synthesized, and its thickness is about 5 nm.