Ent-Kaurane diterpenoid glycosides as soft-templates for the synthesis of high-surface area anatase titanium dioxide. An electron microscopy study and Rietveld Refinement angela

摘要

In the present study, high-resolution transmission electron microscopy (HRTEM) and field emission scanning electron microscopy (FE-SEM) were used to investigate the effect of ent-Kaurane diterpenoid glycoside molecules as soft templates on the synthesis of anatase titanium dioxide. Such studies revealed that thesupramolecular arrangement that form the ent-Kaurane diterpenoid serve as mold, around which a framework is built up. The images TEM and HRTEM obtained suggested that the sinthesized anatase titanium dioxide contain structures consisting of aggregates of nanoparticles with an average diameter of about 3-8 nm. These observations support that the formation of porous nanostructured anatase arises as a consequence ofthe removal of the organic molecules. In this work, the chemical modification of titanium alkoxide in the aqueous system is also discussed. Additionally, the nanomaterial was characterized by powder X-ray diffraction data (Rietveld refinement), and N2 adsorption porosimetry.