Improvement Possibilities of Heterogeneous Photocatalysis with the Aim of In-Field Use
| Autor: | Péter Hegedűs, Orsolya Fónagy, Ottó Horváth, Erzsébet Szabó-Bárdos, Annamária Dobrádi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Vinyl alcohol
General Chemical Engineering Radical Thermal decomposition of PVA Benzenesulfonic acid 02 engineering and technology 010501 environmental sciences Photochemistry Heterogeneous catalysis 01 natural sciences Catalysis lcsh:Chemistry Immobilization chemistry.chemical_compound TiO2-based photocatalysis Hydrogen peroxide 0105 earth and related environmental sciences Triton X-100 food and beverages Silver-deposited TiO2 General Chemistry 021001 nanoscience & nanotechnology Scavenger (chemistry) lcsh:QD1-999 chemistry Chemistry (miscellaneous) Photocatalysis Hydroxyl radical 0210 nano-technology |
| Zdroj: | Hungarian Journal of Industry and Chemistry, Vol 45, Iss 1, Pp 37-48 (2017) |
| ISSN: | 2450-5102 0133-0276 |
| DOI: | 10.1515/hjic-2017-0007 |
| Popis: | Heterogeneous photocatalysis can be successfully applied for the degradation of organic pollutants, although the efficiency of this method is insufficient. It can be increased by modification of the catalyst with precious metals (e.g. silver) or heterogeneous catalysis can be combined with other oxidative procedures such as ozonation. Another obstacle to the infield use of the method is that separating the catalyst from the liquid phase is difficult. This problem can be eliminated by the immobilization of the catalyst. The poly(vinyl alcohol)-TiO2 immobilized catalyst has been prepared for this purpose. During TiO2-based photocatalysis, active oxygen species such as the hydroxyl radical, superoxide radical and hydrogen peroxide are produced. The formation rate of the oxidative •OH radicals was also determined in the case of the previously mentioned techniques. As a scavenger of this radical, coumarin was added. |
| Databáze: | OpenAIRE |
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