Influence of organic molecules on the aggregation of TiO2 nanoparticles in acidic conditions

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Sökning: L773:1388 0764 OR L773:1572 896X > Influence of organi...

Influence of organic molecules on the aggregation of TiO2 nanoparticles in acidic conditions

Danielsson, Karin (författare): Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg

Gallego-Urrea, Julian A., 1977 (författare): Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences,University of Gothenburg

Hassellöv, Martin, 1970 (författare): Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences,University of Gothenburg

visa fler...

Gustafsson, Stefan, 1976 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Jonsson, Caroline, 1977 (författare): Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg

visa färre...

(creator_code:org_t)

2017-04-04
2017
Engelska.
Ingår i: Journal of nanoparticle research. - : Springer Science and Business Media LLC. - 1388-0764 .- 1572-896X. ; 19

Relaterad länk:: https://gup.ub.gu.se... (primary) (free); visa fler...; https://link.springe...; http://publications.... (primary) (free); https://gup.ub.gu.se...; https://doi.org/10.1...; https://research.cha...; visa färre...

Tidskriftsartikel (refereegranskat)

Abstract Ämnesord

Stäng

© 2017, The Author(s).Engineered nanoparticles released into the environment may interact with natural organic matter (NOM). Surface complexation affects the surface potential, which in turn may lead to aggregation of the particles. Aggregation of synthetic TiO2 (anatase) nanoparticles in aqueous suspension was investigated at pH 2.8 as a function of time in the presence of various organic molecules and Suwannee River fulvic acid (SRFA), using dynamic light scattering (DLS) and high-resolution transmission electron microscopy (TEM). Results showed that the average hydrodynamic diameter and ζ-potential were dependent on both concentration and molecular structure of the organic molecule. Results were also compared with those of quantitative batch adsorption experiments. Further, a time study of the aggregation of TiO2 nanoparticles in the presence of 2,3-dihydroxybenzoic acid (2,3-DHBA) and SRFA, respectively, was performed in order to observe changes in ζ-potential and particle size over a time period of 9months. In the 2,3-DHBA-TiO2 system, ζ-potentials decreased with time resulting in charge neutralization and/or inversion depending on ligand concentration. Aggregate sizes increased initially to the micrometer size range, followed by disaggregation after several months. No or very little interaction between SRFA and TiO2 occurred at the lowest concentrations tested. However, at the higher concentrations of SRFA, there was an increase in both aggregate size and the amount of SRFA adsorbed to the TiO2 surface. This was in correlation with the ζ-potential that decreased with increased SRFA concentration, leading to destabilization of the system. These results stress the importance of performing studies over both short and long time periods to better understand and predict the long-term effects of nanoparticles in the environment.

Ämnesord

NATURVETENSKAP -- Kemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
NATURVETENSKAP -- Fysik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)

Nyckelord

Adsorption
Aggregation
Anatase
Environmental effects
Organic molecules
TiO nanoparticles 2
ζ-potential
Environmental effects

Publikations- och innehållstyp

ref (ämneskategori)
art (ämneskategori)

Hitta via bibliotek

Journal of nanoparticle research (Sök värdpublikationen i LIBRIS)

Till lärosätets databas

Hitta mer i SwePub

Av författaren/redakt...: Danielsson, Kari ...; Gallego-Urrea, J ...; Hassellöv, Marti ...; Gustafsson, Stef ...; Jonsson, Carolin ...

Om ämnet

NATURVETENSKAP: NATURVETENSKAP; och Kemi

NATURVETENSKAP: NATURVETENSKAP; och Geovetenskap och ...; och Miljövetenskap

NATURVETENSKAP: NATURVETENSKAP; och Fysik

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Nanoteknik

Artiklar i publikationen: Journal of nanop ...

Av lärosätet: Göteborgs universitet; Chalmers tekniska högskola

Sök utanför SwePub

Sök vidare i:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se