Papers by Keyword: Soluble Starch

Abstract: In this study, we prepared gold nanoparticles in micro-emulsion and found the optimum ratio of micro-emulsion for preparing gold nanoparticles. We reported a new stabilizer for preparing gold nanoparticles in aqueous and found the optimum mass ratio between the stabilizer and chlorauric acid. All gold nanoparticles prepared by these two methods were characterized by transmission electron microscopy, ultraviolet-visible spectrophotometer and synchronous light-scattering spectrophotometer. The results of transmission electron microscopy showed that the diameter range of gold nanoparticles prepared in micro-emulsion was 5~10 nm, and that in aqueous was 10~15 nm. They all had homogeneous distribution and dense structures.

Abstract: Micrometer-sized mesoporous silica SBA-15 spheres with good dispersivity were successfully synthesized by adding the soluble starch into the aqueous solution containing P123 and tetraethyl orthosilicate, based on the special function of water-soluble polymer in the sol-gel process. The obtained SBA-15 silica spheres were characterized by scanning electron microscopy, X-ray diffraction and N2 physisorption technique. The obtained SBA-15 spheres possessed pore size from 17.4 nm to 24.3 nm and the specific surface area from 565.3 m2 g-1 to 459.4 m2 g-1. Furthermore, the dispersibility of SBA-15 silica spheres was good. The results showed that appropriate amount of soluble starch improved the uniformity and dispersibility of silica spheres, while the structure and pore size of the obtained SBA-15 silica spheres with hexagonal symmetry created by P123 remained unchanged.