Linked Life Data

19911794

Source:http://linkedlifedata.com/resource/pubmed/id/19911794

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
24
pubmed:dateCreated
2009-12-16
pubmed:abstractText
In this study, octadecyl (C(18)) and aminopropyl group modified titanate nanotubes (C(18)/NH(2)-TNs) were prepared successfully with a silylation method by introducing octadecyltrimethoxysilane (ODS) and aminopropyltrimethoxysilane (APS) simultaneously to the surface of titanate nanotubes (TNs). The properties of the products were characterized in detail. The results indicated that there might be steric hindrance effects to C(18) groups on the nanoscaled interior and exterior space of TNs. Therefore, aminopropyl groups were more ready to immobilize on the surface of TNs than C(18) groups when the organosilanes ODS and APS coexisted in reaction solution. C(18)/NH(2)-TNs with the obvious characteristic of C(18) and aminopropyl groups were obtained as the ratio of ODS/APS in reaction solution was 4.0, and the corresponding proportion of the two groups (C(18)/NH(2)) on the C(18)/NH(2)-TN surface was about 0.25. This adsorbent had good water dispersibility, overcoming the bad deficiency of reverse phase nanosized materials in water and improving its accessibility to polar analytes. Due to the cooperative effect of alkyl and aminopropyl groups coupled with the residual hydroxyl groups on the surface, C(18)/NH(2)-TNs exhibited excellent affinity efficiency to some ionic or ionizable organic analytes under a different solution pH, including anionic (perfluorooctane sulfonate, perfluorooctanoic acid, and sodium dodecyl sulfate), cationic (cetyltrimethylammonium bromide), and amphoteric compounds (sulfamethazine). The selective binding of these anionic, amphoteric, and cationic analytes could be achieved by adjusting solution pH to acid, neutral, and alkaline conditions, respectively. Since C(18)/NH(2)-TNs possessed relatively large surface areas and strong affinity ability to ionic analytes, especially with long alkyl chains, it showed significantly higher adsorption capacity for perfluorooctane sulfonate than activated carbon and anion-exchange resin.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/3-aminopropyltrimethoxysilane, http://linkedlifedata.com/resource/pubmed/chemical/Alkanesulfonic Acids, http://linkedlifedata.com/resource/pubmed/chemical/Cetrimonium Compounds, http://linkedlifedata.com/resource/pubmed/chemical/Fluorocarbons, http://linkedlifedata.com/resource/pubmed/chemical/Octanoic Acids, http://linkedlifedata.com/resource/pubmed/chemical/Organosilicon Compounds, http://linkedlifedata.com/resource/pubmed/chemical/Propylamines, http://linkedlifedata.com/resource/pubmed/chemical/Silanes, http://linkedlifedata.com/resource/pubmed/chemical/Sodium Dodecyl Sulfate, http://linkedlifedata.com/resource/pubmed/chemical/Sulfamethazine, http://linkedlifedata.com/resource/pubmed/chemical/Titanium, http://linkedlifedata.com/resource/pubmed/chemical/cetrimonium, http://linkedlifedata.com/resource/pubmed/chemical/n-octadecyltrimethoxysilane, http://linkedlifedata.com/resource/pubmed/chemical/perfluorooctane sulfonic acid, http://linkedlifedata.com/resource/pubmed/chemical/perfluorooctanoic acid
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1520-6882
pubmed:author
pubmed:issnType
Electronic
pubmed:day
15
pubmed:volume
81
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
9913-20
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Preparation of octadecyl and amino mixed group modified titanate nanotubes and its efficient adsorption to several ionic or ionizable organic analytes.
pubmed:affiliation
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't