title: Novel TiO2/C3N4Photocatalysts for Photocatalytic Reduction of CO2and for Photocatalytic Decomposition of N2O.
abstract: TiO2/g-C3N4photocatalysts with the ratio of TiO2to g-C3N4ranging from 0.3/1 to 2/1 were prepared by simple mechanical mixing of pure g-C3N4and commercial TiO2Evonik P25. All the nanocomposites were characterized by X-ray powder diffraction, UV-vis diffuse reflectance spectroscopy, photoluminescence, X-ray photoelectron spectroscopy, Raman spectroscopy, infrared spectroscopy, transmission electron microscopy, photoelectrochemical measurements, and nitrogen physisorption. The prepared mixtures along with pure TiO2and g-C3N4were tested for the photocatalytic reduction of carbon dioxide and photocatalytic decomposition of nitrous oxide. The pure g-C3N4exhibited the lowest photocatalytic activity in both cases, pointing to a very high recombination rate of charge carriers. On the other hand, the most active photocatalyst toward all the products was (0.3/1)TiO2/g-C3N4. The highest activity is achieved by combination of a number of factors: (i) specific surface area, (ii) adsorption edge energy, (iii) crystallite size, and (iv) efficient separation of the charge carriers, where the efficient charge separation is the most decisive parameter.
authors.forename: Martin
authors.initials: M
authors.lastname: Reli
authors.forename: Pengwei
authors.initials: P
authors.lastname: Huo
authors.forename: Marcel
authors.initials: M
authors.lastname: Šihor
authors.forename: Nela
authors.initials: N
authors.lastname: Ambrožová
authors.forename: Ivana
authors.initials: I
authors.lastname: Troppová
authors.forename: Lenka
authors.initials: L
authors.lastname: Matějová
authors.forename: Jaroslav
authors.initials: J
authors.lastname: Lang
authors.forename: Ladislav
authors.initials: L
authors.lastname: Svoboda
authors.affiliation: Faculty of Chemistry, Jagiellonian University in Kraków , ul. Ingardena 3, 30-060 Kraków, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Kuśtrowski
authors.forename: Michal
authors.initials: M
authors.lastname: Ritz
authors.forename: Petr
authors.initials: P
authors.lastname: Praus
authors.forename: Kamila
authors.initials: K
authors.lastname: Kočí