Journal article 1038 views
A High Resolution Study of Dynamic Changes of Ce2O3 and CeO2 Nanoparticles in Complex Environmental Media
Environmental Science & Technology, Volume: 51, Issue: 14, Pages: 8010 - 8016
Swansea University Author:
Richard Palmer
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DOI (Published version): 10.1021/acs.est.7b01130
Abstract
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 suc...
Published in: | Environmental Science & Technology |
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ISSN: | 0013-936X 1520-5851 |
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2017
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URI: | https://cronfa.swan.ac.uk/Record/cronfa41124 |
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2018-07-25T09:45:03.7655079 v2 41124 2018-07-25 A High Resolution Study of Dynamic Changes of Ce2O3 and CeO2 Nanoparticles in Complex Environmental Media 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2018-07-25 MECH 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. Journal Article Environmental Science & Technology 51 14 8010 8016 0013-936X 1520-5851 18 7 2017 2017-07-18 10.1021/acs.est.7b01130 http://eprints.nottingham.ac.uk/46926/ COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2018-07-25T09:45:03.7655079 2018-07-25T09:36:02.0445445 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Ruth C. Merrifield 1 Kenton P. Arkill 2 Richard Palmer 0000-0001-8728-8083 3 Jamie R. Lead 4 |
title |
A High Resolution Study of Dynamic Changes of Ce2O3 and CeO2 Nanoparticles in Complex Environmental Media |
spellingShingle |
A High Resolution Study of Dynamic Changes of Ce2O3 and CeO2 Nanoparticles in Complex Environmental Media Richard Palmer |
title_short |
A High Resolution Study of Dynamic Changes of Ce2O3 and CeO2 Nanoparticles in Complex Environmental Media |
title_full |
A High Resolution Study of Dynamic Changes of Ce2O3 and CeO2 Nanoparticles in Complex Environmental Media |
title_fullStr |
A High Resolution Study of Dynamic Changes of Ce2O3 and CeO2 Nanoparticles in Complex Environmental Media |
title_full_unstemmed |
A High Resolution Study of Dynamic Changes of Ce2O3 and CeO2 Nanoparticles in Complex Environmental Media |
title_sort |
A High Resolution Study of Dynamic Changes of Ce2O3 and CeO2 Nanoparticles in Complex Environmental Media |
author_id_str_mv |
6ae369618efc7424d9774377536ea519 |
author_id_fullname_str_mv |
6ae369618efc7424d9774377536ea519_***_Richard Palmer |
author |
Richard Palmer |
author2 |
Ruth C. Merrifield Kenton P. Arkill Richard Palmer Jamie R. Lead |
format |
Journal article |
container_title |
Environmental Science & Technology |
container_volume |
51 |
container_issue |
14 |
container_start_page |
8010 |
publishDate |
2017 |
institution |
Swansea University |
issn |
0013-936X 1520-5851 |
doi_str_mv |
10.1021/acs.est.7b01130 |
college_str |
Faculty of Science and Engineering |
hierarchytype |
|
hierarchy_top_id |
facultyofscienceandengineering |
hierarchy_top_title |
Faculty of Science and Engineering |
hierarchy_parent_id |
facultyofscienceandengineering |
hierarchy_parent_title |
Faculty of Science and Engineering |
department_str |
School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering |
url |
http://eprints.nottingham.ac.uk/46926/ |
document_store_str |
0 |
active_str |
0 |
description |
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. |
published_date |
2017-07-18T03:52:25Z |
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1763752590235926528 |
score |
11.021648 |