TY  - CONF
AU  - Pliekhova, Olena
AU  - Arcon, Iztok
AU  - Stangar, Urska Lavrencic
TI  - Structural analysis of sunlight efficient Cu and Zr modified TiO<sub>2</sub> photocatalyst
PB  - University of Nova Gorica
M1  - PUBDB-2017-09673
PY  - 2017
AB  - Solving of the renewable energy as well as environmental sustainability issues is on the top ofconsideration nowadays. Using abundant, inexpensive, nontoxic and efficient material,photocatalysis can be a great alternative and promising approach for many important processes [1].The most known (due to its availability and appropriate properties) photocatalyst is TiO2. However,it is only activated by irradiation at wavelengths shorter than 400 nm. To effectively utilize lightwith longer wavelength (visible spectrum) metal and non-metal doping were explored [2].Nevertheless, quantum yield of electronic process under visible light in doped materials is muchlower than under UV, due to crystal defects and generation of recombination centers. On the otherhand the surface modification process is very attractive because the visible-light activity can beinduced without changes in crystal structure. Most probably, visible light sensitivity can beachieved by the interfacial charge transfer process of excited TiO2 electrons to the modifier [3].Evonik Degussa P25 is one of the most efficient photocatalyst, showing photocatalytic activity evenunder the visible light [4]. The surface modification of TiO2 with two different elementssimultaneously finds its place among different approaches. The improvement in the activity of TiO2modified with appropriate combination of two or more elements is assigned to the existence ofsynergistic effect. The promising combination for sunlight driven TiO2 photocatalysis is acombination of Cu and Zr for TiO2 surface modification [5].The objective of our research is to improve photocatalytic properties of P25 by facile surfacemodification method with Cu and Zr, to find the correlation between catalytic and structuralproperties of modified P25 materials, and to identify the synergistic role of the two elements. Wereport on the results of Cu and Zr K-edge EXAFS (Extended X-ray Absorption Fine Structure)analysis of Cu and Zr chemical state and local environment in the surface modified P25photocatalyst.
T2  - The 21st International Conference on Solid State Ionics
CY  - 18 Jun 2017 - 23 Jun 2017, Padua (Italy)
Y2  - 18 Jun 2017 - 23 Jun 2017
M2  - Padua, Italy
LB  - PUB:(DE-HGF)24
DO  - DOI:10.3204/PUBDB-2017-09673
UR  - https://bib-pubdb1.desy.de/record/390616
ER  -