Zheng Kui, Chen Tao, Zhang Jian, Tian Xiuquan, Ge Huilin, Qiao Tiantao, Lei Jia, Li Xianyan, Duan Tao, Zhu Wenkun
Analytical and Testing Center, Southwest University of Science and Technology, Mianyang 621010, China.
State Key Laboratory of Environmentally Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China.
Materials (Basel). 2019 Apr 29;12(9):1392. doi: 10.3390/ma12091392.
In this paper, nano-montmorillonite (nano-MMT) was introduced into the microbial mineralization system of strontium carbonate (SrCO). By changing the nano-MMT concentration and the mineralization time, the mechanism of mineralization was studied. SrCO superstructures with complex forms were acquired in the presence of nano-MMT as a crystal growth regulator. At low concentrations of nano-MMT, a cross-shaped SrCO superstructure was obtained. As the concentration increased, flower-like SrCO crystals formed via the dissolution and recrystallization processes. An emerging self-assembly process and crystal polymerization mechanism have been proposed by forming complex flower-like SrCO superstructures in high concentrations of nano-MMT. The above research indicated that unique bionic synthesis strategies in microbial systems could not only provide a useful route for the production of inorganic or inorganic/organic composites with a novel morphology and unique structure but also provide new ideas for the treatment of radionuclides.
在本文中，将纳米蒙脱石（nano-MMT）引入碳酸锶（SrCO₃）的微生物矿化体系。通过改变纳米蒙脱石浓度和矿化时间，研究了矿化机理。在作为晶体生长调节剂的纳米蒙脱石存在下，获得了具有复杂形态的SrCO₃超结构。在低浓度纳米蒙脱石时，得到了十字形的SrCO₃超结构。随着浓度增加，通过溶解和重结晶过程形成了花状SrCO₃晶体。通过在高浓度纳米蒙脱石中形成复杂的花状SrCO₃超结构，提出了一种新出现的自组装过程和晶体聚合机理。上述研究表明，微生物体系中独特的仿生合成策略不仅可为生产具有新颖形态和独特结构的无机或无机/有机复合材料提供有用途径，还可为放射性核素的处理提供新思路。
