胱氨酸基质下二氧化硅微球的仿生合成及其表征

以胱氨酸为模板剂、正硅酸乙酯（TEOS）为硅源,仿生合成表面具有疏松多孔结构的二氧化硅微球.利用场发射扫描电子显微镜（FE-SEM）、热重分析仪（TGA）、傅立叶变换红外光谱仪（FT-IR）以及X-射线衍射仪（XRD）、对产物进行表征.FE-SEM、FT-IR表征结果显示SiO_2微球的形成过程为：在胱氨酸的模板分子作用下TEOS水解生成具有微球形貌的键合型有机-无机杂化微粒,该微粒经600℃煅烧得到SiO_2微球;XRD表征结果表明SiO_2微球为无定型结构.依据表征结果,进一步对二氧化硅微球的形成机理进行了探讨.

Biomimetic synthesis and characterization of SiO2 microsphere with the existence of the cystine

Based on the principle of biomimetic synthesis,SiO2 microsphere with loose porous structure was synthesized using cystine as a template and the ethyl orthosilicate（TEOS） as raw material.Field emission scanning electron microscope（FE-SEM）,Fourier transform infrared spectrograph（FT-IR）、TGA and X-ray diffractometer （XRD） techniques were used to characterize the as-obtained samples.FE-SEM and FT-IR results showed that SiO2 microsphere was synthesized through a two-step process.The organic-inorganic hybrid particles possessing the microsphere shape are formed under the function of the cystine template;then the SiO2 microsphere is obtained after removing the template by calcining at 600℃.XRD pattern indicated that the as-obtained SiO2 was an amorphous structure.The synthesizing mechanism of the SiO2 microsphere was also explored.