+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

A High Resolution Study of Dynamic Changes of Ce 2 O 3 and CeO 2 Nanoparticles in Complex Environmental Media

A High Resolution Study of Dynamic Changes of Ce 2 O 3 and CeO 2 Nanoparticles in Complex Environmental Media

Environmental Science and Technology 51(14): 8010-8016

Ceria nanoparticles (NPs) rapidly and easily cycle between Ce(III) and Ce(IV) oxidation states, making them prime candidates for commercial and other applications. Increased commercial use has resulted in increased discharge to the environment and increased associated risk. Once in complex media such as environmental waters or toxicology exposure media, the same redox transformations can occur, causing altered behavior and effects compared to the pristine NPs. This study used high resolution scanning transmission electron microscopy and electron energy loss spectroscopy to investigate changes in structure and oxidation state of small, polymer-coated ceria suspensions in complex media. NPs initially in either the III or IV oxidation states, but otherwise identical, were used. Ce(IV) NPs were changed to mixed (III, IV) NPs at high ionic strengths, while the presence of natural organic macromolecules (NOM) stabilized the oxidation state and increased crystallinity. The Ce(III) NPs remained as Ce(III) at high ionic strengths, but were modified by the presence of NOM, causing reduced crystallinity and degradation of the NPs. Subtle changes to NP properties upon addition to environmental or ecotoxicology media suggest that there may be small but important effects on fate and effects of NPs compared to their pristine form.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 059337221

Download citation: RISBibTeXText

PMID: 28618231

DOI: 10.1021/acs.est.7b01130

Related references

Characterizing nanoparticles in complex biological media and physiological fluids with depolarized dynamic light scattering. Nanoscale 7(14): 5991-5997, 2015

A high-resolution solid-state 13C-NMR study on crystalline bovine heart cytochrome-c oxidase and lysozyme. Dynamic behavior of protein and detergent in the complex. European Journal of Biochemistry 208(3): 713-720, 1992

Two stage algorithm vs commonly used approaches for the suspect screening of complex environmental samples analyzed via liquid chromatography high resolution time of flight mass spectroscopy: A test study. Journal of Chromatography. a 1501: 68-78, 2017

ChelomEx: Isotope-assisted discovery of metal chelates in complex media using high-resolution LC-MS. Analytical Chemistry 86(22): 11298-11305, 2014

High-resolution electron crystallography of light-harvesting chlorophyll a/b-protein complex in three different media. Journal of Molecular Biology 217(4): 691-699, 1991

High resolution and dynamic sequential computed tomography. Use in the evaluation of glomus complex tumors. Archives of Otolaryngology 109(10): 691-696, 1983

Problems of high resolution complex of methods of dynamic geoelectricity creation for investigation of zone of mineralisation. International Union of Geodesy and Geophysics General Assembly = Union Geodesique et Geophysique Internationale Comptes Rendus de la, 1999

Dynamic changes in the shape of the triangular fibrocartilage complex during rotation demonstrated with high resolution magnetic resonance imaging. Journal of Hand Surgery 24(3): 338-341, 1999

High resolution characterization of engineered nanomaterial dispersions in complex media using tunable resistive pulse sensing technology. Acs Nano 8(9): 9003-9015, 2014

Earlier and better high-resolution single breast imaging during bilateral breast dynamic scans at 3-T MRI: comparison with post dynamic high-resolution imaging. Breast Cancer 22(5): 475-479, 2015

3.0 T MRI with a high resolution protocol for the study of benign disease of the anus and rectum. Part one: High resolution protocol for 3.0 T MRI, anatomic review, benign tumors, and congenital or acquired alterations of the sphincter complex. Radiologia 56(2): 154-166, 2015

Growth-rates and environmental changes in a travertine complex; results from high resolution palaeo- and rock magnetics. Terra Nostra (Bonn) 97-2: 280-281, 1997

Solid-gas reactions of complex oxides inside an environmental high-resolution transmission electron microscope. Micron 32(5): 457-471, 2001

Dynamic study of ion etching in a high resolution SEM. Journal of Materials Science 15(3): 681-684, 1980

The Co-Au interface in bimetallic nanoparticles: a high resolution STEM study. Nanoscale 2(12): 2647-2651, 2010