title: Visible-light-induced photocatalysis of 2D-hexagonal mesoporous SiO2-TiO2 deposited with Au nanoparticles.
abstract: Au nanoparticles (NPs) are deposited using a couple of methods onto a sol-gel-derived mesoporous SiO2-TiO2 template. A modification of the template with 3-aminopropyltriethoxysilane (APTES) before the deposition of Au leads to the formation of Au nanorods instead of Au nanospheres in the tubular mesopores. The modification also causes a deterioration of visible-light-induced photocatalytic activity. Heat treatment of this sample to remove APTES results in an amelioration of the photocatalytic activity. The detailed mechanism of the deterioration and amelioration of the activity is discussed on the accessibility of the reactant to the sample and the easiness of the charge carrier transfer between TiO2 and Au NPs.
authors.forename: Go
authors.initials: G
authors.lastname: Kawamura
authors.forename: Teruhisa
authors.initials: T
authors.lastname: Okuno
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Muto
authors.forename: Atsunori
authors.initials: A
authors.lastname: Matsuda
mesh_terms: D002384:Catalysis; D006046:Gold / Q000737:chemistry*; D006358:Hot Temperature; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D010087:Oxides / Q000737:chemistry; D044367:Phase Transition; D010777:Photochemistry / Q000379:methods*; D012822:Silicon Dioxide / Q000737:chemistry*; D055672:Static Electricity; D020349:Surface Plasmon Resonance; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: D010087:Oxides; C009495:titanium dioxide; D006046:Gold; D012822:Silicon Dioxide; D014025:Titanium; D008751:Methylene Blue