Preparation of silica and TiO2–SiO2 core–shell nanoparticles in water-in-oil microemulsion using compressed CO2 as reactant and antisolvent

Enhanced photocatalytic activity of silica-embedded TiO2 hollow microspheres prepared by one-pot approach

“…When the relative high electronegative Si (1.8) substitutes Ti (1.5), namely, forming Ti-O-Si linkage, it will lead to the decrease of the electron density around Ti species. Consequently, the effective positive charge on Ti increases, which results in the increase of the binding energy of Ti 2p [45,46].…”

Advanced functional nanomaterials with microemulsion phase

“…Zhang [86] et al reported that silica nanospheres were prepared in water-in-oil microemulsion (H 2 O/AOT/isooctane) using compressed CO 2 first as a reactant and then as an antisolvent. The synthetic scheme for the synthesis and recovery of silica and TiO 2 -SiO 2 nanoparticles is illustrated in Schemes 4 and 5.…”

“…Synthetic scheme for the synthesis and recovery of TiO 2 -SiO 2 nanoparticles in reverse micelles [86]. Using this technique, the TiO 2 nanoparticles capped with the silica coatings were also prepared by the reaction of the compressed CO 2 with sodium silicate on the surface of TiO 2 nanoparticles in the reverse micelles.…”

“…TEM photographs of TiO 2 -SiO 2 nanocomposite synthesized in reverse micelles (w= 15) at different r-values of 0.5 (a), 1 (b) and 2 (c); insets show TEM photographs with the four-fold magnification[86].…”

Silica‐Coated Liposomes for Insulin Delivery

“…Silica nanospheres prepared from noncovalently bound organic templates (surfactant, polymers, supramolecular arrays), acoustic cavitation, electrospraying, spray drying, self assembly, freeze thawing, supercritical fluid technology, heterophase polymerization with sol-gel and surface living polymerization process have been reported [17][18][19][20][21][22][23][24]. Solgel derived silica nanospheres were used to encapsulate antibiotics, analgesic, pancreatic islets, dyes and perfumes.…”