Abatement of organics and Escherichia coli using CeO2-TiO2 composite oxides: Ultraviolet and visible light performances

Interface Effects in Sunlight-Driven Ag/g-C3N4 Composite Catalysts: Study of the Toluene Photodegradation Quantum Efficiency

“…17, 26,32,[34][35][36][37][38][39] Although the details of the mechanism are unknown, the degradation is well established to be produced by hole-related hydroxyl radicals as active oxidative species in photocatalysts. 26,36,[40][41][42] Using this information we provided a general framework for analyzing the number of hydroxyl radicals consumed in the formation of benzaldehyde and carbon dioxide, the only products detected at the gas phase in our experiments.…”

Heterogeneous photocatalysis: Light-matter interaction and chemical effects in quantum efficiency calculations

“…While nanostructured ceria is an active photocatalyst upon UV and visible light excitation [16][17][18], the contact between ceria and titania is known to provide rather active materials irrespective of the illumination wavelength [19]. Such contact has been applied for the elimination of organic pollutants through reduction and/or oxidation reactions [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] and, very recently, for the inactivation of microorganisms [29,31]. Due thus to the broad application (within the heterogeneous photocatalysis field) of the ceria-titania system, as well as the relatively different optical properties (in terms of the UV or visible region importance) of the two semiconductors, a set of samples with increasing quantities of ceria deposited onto a titania substrate seems an ideal choice for calibrating the importance of dismissing physical pieces of the mentioned light-matter and morphological effects as a function of the light source nature.…”

Acetaldehyde degradation under UV and visible irradiation using CeO2–TiO2 composite systems: Evaluation of the photocatalytic efficiencies

“…Among the mentioned strategies, the use of visible-lightsensitize phases in intimate contact with TiO 2 has shown to be particularly successful [1][2][3][4]. Specifically, the use of ceria as a solid-state sensitizer has demonstrated a high potential in the photoelimination of contaminants [5][6][7][8][9][10][11][12][13][14]. Ceria can extent absorption capabilities of the catalyst up to ca.…”

“…UV and visible light illumination conditions are considered. Among the possible Ce-Ti molar ratios, we selected specific samples showing optimum activity under both UV and Visible illumination conditions [13,14,26]. These samples were also compared with another Ce-Ti composite sample displaying poor activity, as well as with the appropriate single phase titania reference material.…”

“…In this contribution we aim to analyze the photo-oxidation of acetaldehyde as a model pollutant [27] using recently developed CeO 2 -TiO 2 composite materials [13,14,26]. UV and visible light illumination conditions are considered.…”