The Effect of the ZrO₂ Loading in SiO₂@ZrO₂-CaO Catalysts for Transesterification Reaction.

ABSTRACT: The effect of the ZrO₂ loading was studied on spherical SiO₂@ZrO₂-CaO structures synthetized by a simple route that combines the Stöber and sol-gel methods. The texture of these materials was determined using S_BET by N₂ adsorption, where the increment in SiO₂ spheres' surface areas was reached with the incorporation of ZrO₂. Combined the characterization techniques of using different alcoholic dissolutions of zirconium (VI) butoxide 0.04 M, 0.06 M, and 0.08 M, we obtained SiO₂@ZrO₂ materials with 5.7, 20.2, and 25.2 wt % of Zr. Transmission electron microscopy (TEM) analysis also uncovered the shape and reproducibility of the SiO₂ spheres. The presence of Zr and Ca in the core-shel

SUBMITTER: Salinas D 

PROVIDER: S-EPMC6981678 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature