Látható fénnyel történő vízkezelés rutil fázisú titán-dioxid totokatalizátorokkal
Based on our previous results (discussed below) [1,2] in the present study selfprepared rutile-phased titanium dioxides were synthesized by sol-gel method with the addition of hydrogen peroxide. The characteristic properties (XRD, DRS, IR, specific surface area) and the resulted photocatalytic effic...
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| Dokumentumtípus: | Könyv része |
| Megjelent: |
2015
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| Sorozat: | Proceedings of the International Symposium on Analytical and Environmental Problems
21 |
| Kulcsszavak: | Kémia, Víztisztítás |
| Online Access: | http://acta.bibl.u-szeged.hu/55923 |
| Tartalmi kivonat: | Based on our previous results (discussed below) [1,2] in the present study selfprepared rutile-phased titanium dioxides were synthesized by sol-gel method with the addition of hydrogen peroxide. The characteristic properties (XRD, DRS, IR, specific surface area) and the resulted photocatalytic efficiencies were also investigated. Commercial Aldrich rutile, and Aeroxide P25 were used as reference titanium dioxides. The photocatalytic efficiencies were determined via the decomposition of phenol, and the inactivation of E. coli bacteria under visible light irradiation. The IR spectra indicated, that highly efficient Aldrich rutile has Ti-O-O-Ti groups on its surface (at 667 cm-1 on the IR spectra). Unfortunately the addition of hydrogen-peroxide during the synthesis did not result the appearance of Ti-O-O-Ti groups in measurable amount. However hydrogen peroxide addition resulted increased photocatalytic efficiency in case of a special ratio of the reactants (Ti(OC4H9)4:H2O2:HCl:H2O=1:2:3:50). The DR spectra showed that the resulted photocatalytic efficiencies were mostly related to the band-gap values. |
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| Terjedelem/Fizikai jellemzők: | 38-42 |
| ISBN: | 978-963-306-411-5 |