Structure and photocatalytic performance of TiO2/clay nanocomposites for the degradation of dimethachlor
| dc.contributor.author | Belessi, V. C. | en |
| dc.contributor.author | Lambropoulou, D. | en |
| dc.contributor.author | Konstantinou, I. | en |
| dc.contributor.author | Katsoulidis, A. | en |
| dc.contributor.author | Pomonis, P. | en |
| dc.contributor.author | Petridis, D. | en |
| dc.contributor.author | Albanis, T. | en |
| dc.date.accessioned | 2015-11-24T16:48:18Z | |
| dc.date.available | 2015-11-24T16:48:18Z | |
| dc.identifier.issn | 0926-3373 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/9301 | |
| dc.rights | Default Licence | - |
| dc.subject | tio2 photocatalysts | en |
| dc.subject | nanocomposites | en |
| dc.subject | clays | en |
| dc.subject | organic pollutants | en |
| dc.subject | selective catalytic-reduction | en |
| dc.subject | titania-pillared clay | en |
| dc.subject | tio2 | en |
| dc.subject | acid | en |
| dc.subject | montmorillonite | en |
| dc.subject | nanoparticles | en |
| dc.subject | water | en |
| dc.subject | hydrolysis | en |
| dc.subject | mechanisms | en |
| dc.subject | pollutants | en |
| dc.title | Structure and photocatalytic performance of TiO2/clay nanocomposites for the degradation of dimethachlor | en |
| heal.abstract | In the present study TiO2/Clay composites were synthesized by dispersion of TiO2 on the surfaces of a natural montmorillonite and a synthetic hectorite in order to increase the sorption ability of TiO2 and therefore its photocatalytic action. Six materials with different loading in TiO2 (15, 30 and 55 wt%) were prepared and characterized by several analytical techniques including XRD, BET and SEM analysis. The synthetic procedure allows the development of delaminated layers for hectorite-TiO2 samples, while in the case of montmorillonite-TiO2 composites we have the formation of a more lamellar-like aggregation. It was found that, the greater the percentage of TiO2, the greater the pore volume and the specific surface area of the montmorillonite-TiO2 samples. On the contrary, in the case of hectorite-TiO2 samples, as the content of TiO2 increases, the surface area and pore volume decreases. The photocatalytic efficiency of the nanocomposite catalysts was evaluated using a chloroacetanilide herbicide (dimethachlor) in water as model compound. The primary degradation of dimethachlor followed pseudo-first-order kinetics according to the Langmuir-Hinshelwood model. All supported catalysts exhibit good photodegradation efficiency and their overall removal efficiency per mass of TiO2 was better than that of bare TiO2 produced by the sol-gel method. In conclusion, together with their good sedimentation ability the composite materials could be considered as a promising alternative for the removal of organic water contaminants. (c) 2007 Elsevier B.V. All rights reserved. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | DOI 10.1016/j.apcatb.2006.12.011 | - |
| heal.identifier.secondary | <Go to ISI>://000246539900009 | - |
| heal.identifier.secondary | http://ac.els-cdn.com/S0926337306005133/1-s2.0-S0926337306005133-main.pdf?_tid=1edc843aaa9752aeeef2568039636456&acdnat=1333022690_ab1f2c7928bca5bf3be8f18377100449 | - |
| heal.journalName | Applied Catalysis B-Environmental | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2007 | - |
| 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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