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

Metaxa, E; Kolliopoulos, A; Agelakopoulou, T; Roubani-Kalantzopoulou, F

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	https://dspace.lib.ntua.gr/xmlui/handle/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