Effect of Some Oxidation Treatments on the Textural Characteristics and Surface Chemical Nature of an Activated Carbon

The changes produced in an activated carbon by treatment in aqueous solutions of (NH4)2S2O8 and H2O2 are compared with the modifications produced by oxygen plasma. These changes are monitored by measuring the textural characteristics (surface areas, porosity, pore size distributions) and surface che...

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Bibliographic Details
Published inJournal of colloid and interface science Vol. 222; no. 2; pp. 233 - 240
Main Authors Domingo-García, M., López-Garzón, F.J., Pérez-Mendoza, M.
Format Journal Article
LanguageEnglish
Published San Diego, CA Elsevier Inc 15.02.2000
Elsevier
Subjects
ACTIVATED CARBON
Adsorbents
AMMONIUM SULFATES
chemical groups
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
HYDROGEN PEROXIDE
MATERIALS SCIENCE
OXIDATION
OXYGEN
PORE STRUCTURE
porosity
Porous materials
surface
Surface physical chemistry
SURFACE PROPERTIES
oxidation
activated carbon
surface
chemical groups
porosity
Plasma
Oxygen
Experimental study
Dimension spectrum
Hydrogen Peroxides
Porous material
Mesoporosity
Surface treatment
Ammonium Peroxodisulfates
Pore size
Chemical modification
Activated carbon
Structure modification
Oxidation
Aqueous solution
Comparative study
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Summary:The changes produced in an activated carbon by treatment in aqueous solutions of (NH4)2S2O8 and H2O2 are compared with the modifications produced by oxygen plasma. These changes are monitored by measuring the textural characteristics (surface areas, porosity, pore size distributions) and surface chemical groups. The former are studied by N2 and CO2 adsorption, mercury porosimetry and hydrocarbon adsorption at zero surface coverage. The chemical surface groups are determined by chemical titrations and FTIR Spectroscopy. The results show large differences between the changes produced by treatment in aqueous solutions and those produced by oxygen plasma. Whereas both treatments in aqueous solution modify the textural characteristics, oxygen plasma maintains the surface area and pore network. However, plasma treatment introduces larger amounts of oxygen chemical groups than treatment in aqueous solution.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0021-9797
1095-7103
DOI:10.1006/jcis.1999.6619