Nano-Montmorillonite Regulated Crystallization of Hierarchical Strontium Carbonate in a Microbial Mineralization System

Abstract

In this paper, nano-montmorillonite (nano-MMT) was introduced into the microbial mineralization system of strontium carbonate (SrCO3). By changing the nano-MMT concentration and the mineralization time, the mechanism of mineralization was studied. SrCO3 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 SrCO3 superstructure was obtained. As the concentration increased, flower-like SrCO3 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 SrCO3 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.

Novel bilayer electrospun poly(caprolactone)/ silk fibroin/ strontium carbonate fibrous nanocomposite membrane for guided bone regeneration

“…Besides, the 1070 cm −1 peak described asymmetric stretching vibration of CO 3 2− could be seen in the pattern. However, the absorption band at 1463 cm −1 for CO 3 −2 symmetric stretching vibrant seems to be overlapped by the 1463 cm −1 peak of SF 35,36 …”

“…However, the absorption band at 1463 cm −1 for CO 3 −2 symmetric stretching vibrant seems to be overlapped by the 1463 cm −1 peak of SF. 35,36 Moreover, in Figure 3(b) the XRD pattern of S6 is shown. Investigating this pattern, the crystalline peak of PCL at 2θ = 21.3 is observable and the peak of SF has appeared at 2θ = 23.8 .…”