Mechanism of catalytic decomposition of pentachlorophenol by a highly recyclable heterogeneous SiO(2)-[Fe-porphyrin] catalyst
| dc.contributor.author | Christoforidis, K. C. | en |
| dc.contributor.author | Louloudi, M. | en |
| dc.contributor.author | Milaeva, E. R. | en |
| dc.contributor.author | Deligiannakis, Y. | en |
| dc.date.accessioned | 2015-11-24T16:41:24Z | |
| dc.date.available | 2015-11-24T16:41:24Z | |
| dc.identifier.issn | 0021-9517 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/8413 | |
| dc.rights | Default Licence | - |
| dc.subject | heterogeneous catalyst | en |
| dc.subject | epr | en |
| dc.subject | dr-uv-vis | en |
| dc.subject | ferryl | en |
| dc.subject | compound i | en |
| dc.subject | high-valent iron | en |
| dc.subject | fe-porphyrin | en |
| dc.subject | immobilized | en |
| dc.subject | pcp | en |
| dc.subject | cation radical complexes | en |
| dc.subject | electron-paramagnetic-resonance | en |
| dc.subject | horseradish-peroxidase compound | en |
| dc.subject | water-soluble iron(iii) | en |
| dc.subject | hydrogen-peroxide | en |
| dc.subject | iron-porphyrin | en |
| dc.subject | oxidative-degradation | en |
| dc.subject | chlorinated phenols | en |
| dc.subject | humic substances | en |
| dc.subject | fentons reagent | en |
| dc.title | Mechanism of catalytic decomposition of pentachlorophenol by a highly recyclable heterogeneous SiO(2)-[Fe-porphyrin] catalyst | en |
| heal.abstract | A novel heterogenized FeR(4)P-SiO(2) shows enhanced catalytic efficiency for PCP conversion vs. the homogeneous FeR(4)P catalyst. The heterogenized FeR(4)P-SiO(2) catalyst is highly recyclable in the presence of imidazole in solution. EPR and DR-UV-Vis data provide direct evidence that high-valent iron species [R(4)P(+center dot)Fe(IV)=O] are formed in the heterogenized FeR(4)P-SiO(2) system. The electron spin density of the al, cation radical (Por(+center dot)) is mainly localised on the tetrapyrole frame, and this results in the observed weak magnetic coupling between the S = 1 oxo-ferryl moiety (Fe(IV)=O) and the S = 1/2 porphyrin cation radical (Por(+center dot)). A catalytic cycle mechanism is suggested. Accordingly, the reduction in [R(4)P(+center dot)Fe(IV)=O] can proceed via a substrate molecule, in a one electron-transfer, thus producing [R(4)PFe(IV)] plus a radical entity derived from the substrate. Then, a second electron-transfer to [R(4)PFe(IV)] leads to the regeneration of the initial R(4)PFe(III) state. This second electron can originate from either a substrate molecule or a radical substrate species. (C) 2009 Elsevier Inc. All rights reserved. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | DOI 10.1016/j.jcat.2009.12.016 | - |
| heal.identifier.secondary | <Go to ISI>://000275966100019 | - |
| heal.identifier.secondary | http://ac.els-cdn.com/S0021951709004357/1-s2.0-S0021951709004357-main.pdf?_tid=3d10ded30d3007d49d3d8afab3a33232&acdnat=1333034267_4f49e985966bab3081fc37b58e8563ce | - |
| heal.journalName | Journal of Catalysis | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2010 | - |
| heal.publisher | Elsevier | en |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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