Linked Life Data

17695923

Source:http://linkedlifedata.com/resource/pubmed/id/17695923

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
13
pubmed:dateCreated
2007-8-16
pubmed:abstractText
Iron oxide nanoparticles (IOnPs) as solid catalyst were prepared using a biotic method, i.e., biomineralization, and abiotic methods, i.e., thermal decomposition and electrochemical methods, for use as solid catalysts in the heterogeneous catalytic ozonation of para-Chlorobenzoic acid (pCBA). It was determined that characteristics of IOnPs, including particle size, morphology, surface area, electrokinetic mobility, basic group content, and chemical composition were significantly influenced by the preparation methods. TEM and FE-SEM analyses showed that the thermal decomposition method produced monodispersed and regularly spherical particles. The smallest iron oxide was also prepared by the thermal decomposition method, whereas the electrochemical method produced the largest iron oxide in terms of mean particle size. The specific surface area was found to be inversely proportional to the mean particle size. In catalytic ozonation at acidic pH levels, it was clearly observed that IOnPs enhanced the degradation of pCBA by the production of *OH radicals resulting from the catalytic decomposition of ozone. Additionally, functional groups and surface area were found to play an important role in the catalytic activity of IOnPs. To this extend, in a comparison of particle types, IOnPs prepared by the thermal decomposition method (IO(TD)) showed the greatest catalytic activity in terms of R(ct) value representing the ratio of hydroxyl radicals and ozone. This result may be due to the relatively higher surface area and basic group content of IO(TD) than other IOnPs.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0013-936X
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
41
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
4741-7
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Preparation of biotic and abiotic iron oxide nanoparticles (IOnPs) and their properties and applications in heterogeneous catalytic oxidation.
pubmed:affiliation
Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu 500-712, South Korea.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't