Correlations between photocatalytic activity and chemical structure in copper doped TiO2-SiO2 with surface/incorporated Cu2+ sitesTihana Čižmar
, Iztok Arčon
, Urška Lavrenčič Štangar
, 2016, published scientific conference contribution abstract
Abstract: Sol−gel method was used to synthesize copper doped TiO2-SiO2 with varied dopant concentrations using tetraisopropoxide (TTIP) and copper acetlyacetonate (CuAcAc) as titania and copper sources. Structural information of Cu cation incorporation and its chemical state in the coatings are determined with Cu K-edge EXAFS and XANES analysis. The correlations between chemical state of the Cu dopant and the photocatalytic properties of the new active coatings are discussed.
Found in: ključnih besedah
Summary of found: ... dip-coating, titanium dioxide, metal doping, Cu K-edge XANES,...
Keywords: dip-coating, titanium dioxide, metal doping, Cu K-edge XANES, photocatalytic activity
Published: 07.07.2016; Views: 4390; Downloads: 0
Comparing black-carbon- and aerosol-absorption-measuring instruments – a new system using lab-generated soot coated with controlled amounts of secondary organic matterAntti-Pekka Hyvärinen
, Konstantina Vasilatou
, Matthias Oscity
, Ernest Weingartner
, Bradley Visser
, Jannis Röhrbein
, Luka Drinovec
, Daniel M. Kalbermatter
, Griša Močnik
, 2022, original scientific article
Abstract: We report on an inter-comparison of black-carbon- and aerosol-absorption-measuring instruments with laboratory-generated soot particles coated with controlled amounts of secondary organic matter (SOM). The aerosol generation setup consisted of a miniCAST 5201 Type BC burner for the generation of soot particles and a new automated oxidation flow reactor based on the micro smog chamber (MSC) for the generation of SOM from the ozonolysis of α-pinene. A series of test aerosols was generated with elemental to total carbon (EC TC) mass fraction ranging from about 90 % down to 10 % and single-scattering albedo (SSA at 637 nm) from almost 0 to about 0.7. A dual-spot Aethalometer AE33, a photoacoustic extinctiometer (PAX, 870 nm), a multi-angle absorption photometer (MAAP), a prototype photoacoustic instrument, and two prototype photo-thermal interferometers (PTAAM-2λ and MSPTI) were exposed to the test aerosols in parallel. Significant deviations in the response of the instruments were observed depending on the amount of secondary organic coating. We believe that the setup and methodology described in this study can easily be standardised and provide a straightforward and reproducible procedure for the inter-comparison and characterisation of both filter-based and in situ black-carbon-measuring (BC-measuring) instruments based on realistic test aerosols.
Found in: ključnih besedah
Keywords: black carbon, aerosol absorption, secondary organic aerosol, coating
Published: 01.02.2022; Views: 553; Downloads: 17
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