Publication

Metal-doped carbon aerogels as catalysts during ozonation processes in aqueous solutions

Related publications (34)

Morphological Characterization of ALD and Doping Effects on Mesoporous SnO2 Aerogels by XPS and Quantitative SEM Image Analysis

Atomic layer deposition (ALD) is unsurpassed in its ability to create thin conformal coatings over very rough and/or porous materials. Yet although the coating thickness on flat surfaces can be measured by ellipsometry, characterization of these coatings o ...

Amer Chemical Soc2016

Molecular Origin and Electrochemical Influence of Capacitive Surface States on Iron Oxide Photoanodes

Michael Graetzel, Artur Braun, Yelin Hu, Florent Alexandre Boudoire

The origin, the nature, and the electronic structure of surface defects causing surface states on metal oxides and their role in solar water splitting have been under scrutiny for several decades. In the present study, the surface of hematite films is trea ...

American Chemical Society2016

Chemical Oxidation of Dissolved Organic Matter by Chlorine Dioxide, Chlorine, And Ozone: Effects on Its Optical and Antioxidant Properties

Urs von Gunten, Silvio Canonica

In water treatment dissolved organic matter (DOM) is typically the major sink for chemical oxidants. The resulting changes in DOM, such as its optical properties have been measured to follow the oxidation processes. However, such measurements contain only ...

Amer Chemical Soc2013

Highly efficient bacteria inactivation and phenol degradation by visible light irradiated iodine doped TiO2

László Forró, Andrzej Sienkiewicz, Klara Hernadi

In this study visible light active iodine doped titanium dioxide samples prepared by sol-gel method were investigated. Photocatalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray fluorescence spectroscopy (XF ...

Elsevier Science Bv2013

Interface Investigations on Titanium Nitride Bilayer Systems

Dominik Anwar Jaeger

Nanocomposite coatings composed of two phases with atomically sharp phase boundaries, show interesting mechanical properties. These properties are often originating from their high interface to volume ratio. Composites of nanocrystalline titanium nitride ( ...

EPFL2012

Chemistry of Ozone in Water and Wastewater Treatment

Urs von Gunten

Even though ozone has been applied for a long time for disinfection and oxidation in water treatment, there is lack of critical information related to transformation of organic compounds. This has become more important in recent years, because there is con ...

IWA Publishing2012

UV–Ozone Cleaning of Supported Poly(vinylpyrrolidone)-Stabilized Palladium Nanocubes: Effect of Stabilizer Removal on Morphology and Catalytic Behavior

Lioubov Kiwi, Rocio Micaela Crespo Quesada, Artur Yarulin

Poly(vinylpyrrolidone) (PVP)-stabilized Pd nanocubes were synthesized, deposited on a carbon-based support, and subsequently treated with UV-ozone (UVO) in order to eliminate the traces of PVP still present on the surface. Cubes, being a thermodynamically ...

2011

Development of a Photo-Fenton Catalyst Supported on Modified Polymer Films

Félicien Mazille

The work presented in this thesis is a part of the European project INNOWATECH. The global objective of this project was to provide effective technological solutions for the treatment of industrial wastewater, to propose new concepts in wastewater treatmen ...

EPFL2010

Ag-doped carbon aerogels for removing halide ions in water treatment

Urs von Gunten

The objective of this study was to analyze the efficiency of silver(Ag)-doped carbon aerogels for the removal of bromide (Br-) and iodide (I-) from drinking waters. Textural characterization of Ag-doped aerogels showed that an increase in the Ag dose added ...

2007

The basics of oxidants in water treatment. Part B: ozone reactions

Urs von Gunten

The oxidation of organic and inorganic compounds during ozonation can occur via ozone or OH radicals or a combination thereof. Ozone is an electrophile with a high selectivity. The reactions of ozone with cc inorganic compounds are typically fast and occur ...

2007

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