The role of surface heterogeneity and lateral interactions in the adsorption of volatile organic compounds on rutile surface

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dc.contributor.author Metaxa, E en
dc.contributor.author Kolliopoulos, A en
dc.contributor.author Agelakopoulou, T en
dc.contributor.author Roubani-Kalantzopoulou, F en
dc.date.accessioned 2014-03-01T01:32:11Z
dc.date.available 2014-03-01T01:32:11Z
dc.date.issued 2009 en
dc.identifier.issn 0169-4332 en
dc.identifier.uri http://hdl.handle.net/123456789/20067
dc.subject Adsorption phenomena en
dc.subject Lateral interactions en
dc.subject Reversed Flow-Inverse Gas Chromatography en
dc.subject Surface heterogeneity en
dc.subject Surface reconstruction en
dc.subject Surface topography en
dc.subject.classification Chemistry, Physical en
dc.subject.classification Materials Science, Coatings & Films en
dc.subject.classification Physics, Applied en
dc.subject.classification Physics, Condensed Matter en
dc.subject.other Acetone en
dc.subject.other Adsorbates en
dc.subject.other Adsorption isotherms en
dc.subject.other Aldehydes en
dc.subject.other Chromatographic analysis en
dc.subject.other Data flow analysis en
dc.subject.other Engineering geology en
dc.subject.other Ethanol en
dc.subject.other Gas adsorption en
dc.subject.other Inverse problems en
dc.subject.other Organic pollutants en
dc.subject.other Oxide minerals en
dc.subject.other Photocatalysis en
dc.subject.other Restoration en
dc.subject.other Surface properties en
dc.subject.other Surface reconstruction en
dc.subject.other Surface topography en
dc.subject.other Titanium oxides en
dc.subject.other Volatile organic compounds en
dc.subject.other Adsorbed molecules en
dc.subject.other Adsorption energies en
dc.subject.other Adsorption phenomena en
dc.subject.other Concentration of en
dc.subject.other Critical questions en
dc.subject.other Differential energies en
dc.subject.other Experimental arrangements en
dc.subject.other Experimental datum en
dc.subject.other Hetero atoms en
dc.subject.other Heterogeneous solid surfaces en
dc.subject.other Heterogeneous surfaces en
dc.subject.other Human healths en
dc.subject.other Lateral interactions en
dc.subject.other Low concentrations en
dc.subject.other Monolayer capacities en
dc.subject.other Non idealities en
dc.subject.other Novel methods en
dc.subject.other Probability functions en
dc.subject.other Reversed Flow-Inverse Gas Chromatography en
dc.subject.other Rutile surfaces en
dc.subject.other Surface bonds en
dc.subject.other Surface heterogeneity en
dc.subject.other Time-resolved analysis en
dc.subject.other White pigments en
dc.subject.other Gas chromatography en
dc.title The role of surface heterogeneity and lateral interactions in the adsorption of volatile organic compounds on rutile surface en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.apsusc.2009.02.035 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.apsusc.2009.02.035 en
heal.language English en
heal.publicationDate 2009 en
heal.abstract Volatile organic compounds (VOCs) are pollutants of great interest because they are very harmful for both human health and the environment, even at very low concentrations. In this work we present and discuss the results of the experimental chromatographic study of the role of surface heterogeneity and lateral interactions in the adsorption of volatile organic compounds - ethanol, acetaldehyde and acetone - on the surface of rutile (TiO2), a typical oxide widely used as a white pigment and a photocatalyst, as well. The ethanol, acetaldehyde and acetone were chosen because they contain the same heteroatom (O) and they have small carbon-chains. The novel method of Reversed Flow-Inverse Gas Chromatography is used, which has a powerful mathematical background and comprises a simple experimental arrangement for the determination of energetic physicochemical quantities directly from the experimental data, by means of a time-resolved analysis. In particular, several important physicochemical quantities are determined, as local adsorption energy, local adsorption isotherm, local monolayer capacity, non-adsorbed gaseous concentration of adsorbate, density probability function for the adsorption energy values, as well as the differential energy of adsorption due to lateral interactions among molecules adsorbed on the heterogeneous solid surface of TiO2. By means of these quantities, appropriate answers are achieved to critical questions of: (a) What is the type of the adsorption isotherm of a system? (b) Where are the adsorbed molecules located on the heterogeneous surface? (c) What is the nature of the surface bonds? (d) What is the type of non-ideality of the system and (e) How does the adsorbate affect the adsorbent properties? (C) 2009 Elsevier B.V. All rights reserved. en
heal.publisher ELSEVIER SCIENCE BV en
heal.journalName Applied Surface Science en
dc.identifier.doi 10.1016/j.apsusc.2009.02.035 en
dc.identifier.isi ISI:000264925400007 en
dc.identifier.volume 255 en
dc.identifier.issue 13-14 en
dc.identifier.spage 6468 en
dc.identifier.epage 6478 en

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