Publication
Cu-decorated Raschig-TiO2 rings inducing MB repetitive discoloration without release of Cu-ions under solar light
Publications associées (38)
In-line electronic and structural characterization of reactively sputtered Cu-Co-Mn black spinel oxides
Andreas Schueler, Anna Krammer, Maxime Lagier
Cu-Co-Mn spinel oxide thin films are deposited by reactive magnetron sputtering. The x-ray diffraction (XRD) spectrum suggests a nanocrystalline spinel film when sputtered at approximate to 465 degrees C. In-line scanning tunneling microscopy confirms nano ...
A V S AMER INST PHYSICS2021Valorization of biomass derivatives through the conversion of phenol over silica-supported Mo-Re oxide catalysts
Ricardo Javier Serpell Carriquiry
Liquid-phase hydrodeoxygenation of phenol over silica-supported MoOx-ReOx catalysts was investigated at 300 degrees C and 5 MPa of H-2. Mixed-oxides catalysts with similar surface metal density (2.3 atoms of metal per nm(2) of SiO2) but different relative ...
2020New Evidence for Ag-Sputtered Materials Inactivating Bacteria by Surface Contact without the Release of Ag Ions: End of a Long Controversy?
The study provides new evidence for Ag-coated polyester (PES) mediating Escherichia colt inactivation by way of genetically engineered E. coli (without porins, from now denoted porinless bacteria). This allows the quantification of the bactericidal kinetic ...
AMER CHEMICAL SOC2020Evidence for a dual mechanism in the TiO2/CuxO photocatalyst during the degradation of sulfamethazine under solar or visible light: Critical issues
César Pulgarin, Juan Kiwi, Sami Rtimi, Jiajie Yu
This study presents the photocatalytic degradation of sulfamethazine (SMT) on TiO2/CuxO nanotubes (NTs) by a differentiated mechanism under low intensity solar light and indoor visible light irradiation. In the presence of TiO2/CuxO nanotubes, the SMT-degr ...
ELSEVIER SCIENCE SA2019Synthesis and characterization of fluorinated anatase nanoparticles and subsequent N-doping for efficient visible light activated photocatalysis
Fluorinated-titanium dioxide (TiO2-F) nanoparticles in a pure anatase polymorph was precipitated from solution by hydrolysis of titanium oxychloride, using urea and ammonia as precipitation agents and potassium fluoride as a source of fluorine anion. A fur ...
2018Polystyrene CuO/Cu2O uniform films inducing MB-degradation under sunlight
César Pulgarin, Juan Kiwi, Sami Rtimi, Oualid Baghriche
This study reports on a Cu-sputtered film on polystyrene (PS) leading to the discoloration/degradation of methylene blue (MB) under low intensity solar simulated irradiation. Direct current magnetron sputtering (DCMS) was used to graft uniform, adhesive Cu ...
Elsevier2017Innovative and stable TiO2 supported catalytic surfaces removing aldehydes under UV-light irradiation
The present study reports the photocatalytic degradation of aldehydes using TiO2 impregnated polyester (PES) and glass fiber (GFT)-TiO2 addressing the photocatalytic degradation aldehydes (air-solid interface). The PES-TiO2 optical absorption was determine ...
Elsevier Science Sa2017Cyan titania nanowires: Spectroscopic study of the origin of the self-doping enhanced photocatalytic activity
László Forró, Arnaud Magrez, Endre Horvath, Alla Arakcheeva, Richard Gaal, Bálint Náfrádi, Massimo Spina, Jacim Jacimovic, Péter Szirmai, Laurent Syavoch Bernard, Xavier Berdat
We report a detailed spectroscopic study of Ti3+ self-doped TiO2 nanowires prepared by high temperature annealing of the protonated titanate nanowires (TiONW) in hydrogen atmosphere. Hydrogenation causes a color change from white to cyan and a major increa ...
Elsevier2017Preparation, kinetics, mechanism and properties of semi-transparent photocatalytic stable films active in dye degradation
César Pulgarin, Juan Kiwi, Christophe Roussel, Laura Victoria Suárez Murillo
The photocatalytic activity, mechanism and characterization of polyethylene-TiO2 films (PE-TiO2) during the discoloration/degradation of methylene blue (MB) are reported in this study. PE-TiO2 films were prepared at moderate temperatures (similar to 90 deg ...
Elsevier2016Atomic Scale Observation of Chemical and Electronic Properties of Metal-Oxide Surfaces
Christian Alexander Stephan Dette
To meet the future global energy demand - an estimated additional 10 terawatts (TWs) per year in 2050 - a diversification of energy sources and fuels is needed. Solar energy represents a prominent alternative energy source. An important material for these ...
EPFL2016