The influence of titanium dioxide modifications on photocatalytic oxidation of lignin and humic acids

Photocatalytic decomposition of humic acids in anoxic aqueous solutions producing hydrogen, oxygen and light hydrocarbons

“…The treatment time 4 h was chosen to obtain at least 50% HA removal by P25 Evonik, often applied as a reference photocatalyst, and enable comparison of the photocatalysts' potentials in water splitting in terms of gaseous products amounts. For the HA concentration measurement, the analytical procedure used previously was applied: [42] after filtration, colour at 455 nm was determined with the Thermo Scientific Evaluation 300 UV-Vis dual-wavelength spectrophotometer with the results interpreted using VisionPro software. In the end of each experimental run, the gaseous products in 1-ml sample were analysed using the Hewlet Packard Gas Chromatograph, model #61540A with the thermal conductive detector and the flame ionizer detector, with the concentrations expressed as parts per million (ppm).…”

Application of Fe-doped TiO 2 specimens for the solar photocatalytic degradation of humic acid

“…The major disadvantage of UV photocatalysis could be overcome through chemical and morphological modifications of the photocatalyst to enable the light absorption in the visible region. Over the past years, most of the research has been devoted to the synthesis and characterization of second generation photocatalysts [3][4][5]. Among many catalyst improvement techniques, doping has been shown to be one of the most promising options.…”

Synthesis of rare earth doped TiO2nanorods as photocatalysts for lignin degradation

“…Commercial P25 TiO 2 was commonly used as a standard photocatalyst for estimating the photocatalytic activities of aromatic molecules. 48,49 Here the kinetic processes of degradation of MO were also compared in the presence of the photocatalysts P25 TiO 2 and RE-TiO 2 NRs by presenting −ln(C/C 0 ) vs. t plots in a Bandgap energies were calculated based on Kubelka-Munk theory.…”