Nanocrystals as stoichiometric reagents with unique surface chemistry. Newadsorbents for air purification

Citation
A. Khaleel et al., Nanocrystals as stoichiometric reagents with unique surface chemistry. Newadsorbents for air purification, NANOSTR MAT, 12(1-4), 1999, pp. 463-466
Citations number
5
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
NANOSTRUCTURED MATERIALS
ISSN journal
0965-9773 → ACNP
Volume
12
Issue
1-4
Year of publication
1999
Part
A
Pages
463 - 466
Database
ISI
SICI code
0965-9773(199907)12:1-4<463:NASRWU>2.0.ZU;2-2
Abstract
Nanocrystals of MgO and CaO were prepared with high surface areas/gram, oft en as high as 500 m(2)/g [1] these materials were investigated as adsorbent s for typical volatile organic compounds that are representative of air pol lutants. As a result of their high surface areas and their enhanced surface reactivity, nanocrystalline MgO and CaO have shown a remarkably high capac ity to chemically adsorb such organic compounds. Compared to high surface a rea activated carbon, the most widely used material in this application, ou r nanocrystalline materials have shown much better adsorption in regards to the amount and the nature of adsorption. FT-IR investigation of acetaldehy de adsorption on AP-MgO indicates that a multilayer dissociative adsorption fakes place as a result of surface interaction with the carbonyl bond foll owed by aldehydic hydrogen dissociation. (C) 1999 Acta Metallurgica Inc.