Surface properties and thermal stability of SiO2-crystalline TiO2 nano-composites

Material Binding Peptides for Nanotechnology

“…This kind of dual affinity behavior was previously observed in another study conducted by Shiba et al on TBP1 peptide [41,79]. This observation may also be expected due to the close chemical characteristics of both metal oxide surfaces [80]. TBP1 peptide was selected from a 12-mer PD library using atomized titania as the substrate.…”

Crystallization of well-defined anatase nanoparticles in SBA-15 for the photocatalytic decomposition of acetic acid

“…The optimization of the crystallization temperature for anatase in SBA-15 [18][19][20][21] and other porous supports such as zeolites [38][39][40] and clays [41][42][43][44][45][46] had been reported for the uses as photocatalysts. The correlation of the particle sizes of the anatase and the BET surface areas of the hybrids with the crystallization temperatures is shown in Fig.…”

“…4,5 The shape and size of the particles as well as their location in MPSs are key factors, so that the TiO 2 species have been immobilized in MPSs in such different states as isolated molecular species and oxide nanoparticles in the silica wall and on the mesopores. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Though the size-controlled synthesis of TiO 2 particles has been a topic of interest in materials chemistry to adapt the wide range of applications of TiO 2 and to optimize the materials' performances, size-controlled synthesis of TiO 2 using MPSs as templates is still challenging.…”

“…7 The optimization of the crystallization temperature of anatase in MPS have been reported where the size of the anatase particle and the porosity of the hybrids changed by increasing the crystallization temperature, which were probably due to the growth of the anatase particles located on the external surface of the MPS particles during the heat treatment. [18][19][20][21] The changes in the size of the anatase and the porosity of the hybrids makes the comparative evaluation of the photocatalysts' performances difficult. The photocatalytic performance of the hybrids is suppressed by the decrease of the surface area of the anatase nanoparticles due to the particles' aggregation/fusion, which block the pore entrance for the adsorption/diffusion of the reactants in the pore channels.…”

HDS of 4,6-dimethyldibenzothiophene over CoMoS supported mesoporous SiO2-TiO2 materials

“…The deposition of TiO 2 on the surface of mesoporous silica is an elegant method for producing active photocatalyst with anatase nanocrystallites dispersed on the huge surface of a SiO 2 thermally stable framework [5]. Moreover, the presence of SiO 2 delays the phase transition anatase-to-rutile, which is preferable for photocatalytic properties since rutile is less active than anatase [6,7]. Our group has recently reported the synthesis of TiO 2 -SiO 2 mesoporous composites with different TiO 2 contents and the study of their catalytic properties for the photodegradation of methylorange dye in aqueous solution [8].…”