以生物蛋白为模板控制合成MnO_2纳米颗粒

Controlled Synthesis of MnO_2 Nanoparticle with Using Biomaterials-protein as Template

利用生物模拟矿化技术原位合成金属氧化物纳米颗粒。利用超分子蛋白纳米空腔结构作为反应模板矿化组装纳米材料,马脾铁蛋白作为限制性反应器控制金属离子水解、氧化还原等反应组装成单分散的纳米粒子。在碱性条件下脱铁铁蛋白限制性合成Mn氧化物纳米颗粒,通过透射电子显微镜(TEM)、EDX元素分析对产品的结构和组成进行表征,产品为球形颗粒状,直径分布在3～8nm范围。此外,采用紫外、可见吸收光谱分析对蛋白组装过程做了实验研究并对纳米材料形成机理进行了讨论。

A novel route for preparing in-situ nanomaterials is presented which is based on super-biomolecules-apoferritin molecules which are ideal template architecture used as defined environment for controlling the formation of monodispersed inorganic materials by the bio-mimetic mineralization. The metal （Mn） oxide nanoparticles were obtained by adding metal ions to the alkalescence solution containing apoferritin through the oxidation-reduction and hydrolysis reactions. The characterization of mineralized sample by TEM and EDX showed the product contained dispersion of spherical particles with a very narrow size distribution range of 3-8nm, In additional,the research on the mineralization process was carried out by UV and visible spectrum. Furthermore,the formation mechanism of nanomaterials based on bio-mineralization was discussed briefly.