{"entity": "researcher", "timestamp": "2026-03-16T17:19:26.748Z", "family": "Etman", "given": "Ahmed S", "initials": "AS", "orcid": "0000-0003-0358-2379", "affiliations": ["Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden", "Department of Chemistry, Faculty of Science, Alexandria University, Ibrahimia, 21321 Alexandria, Egypt"], "links": {"self": {"href": "https://publications.scilifelab.se/researcher/08d17b9094384dae8b7e3d21881d9925.json"}, "display": {"href": "https://publications.scilifelab.se/researcher/08d17b9094384dae8b7e3d21881d9925"}}, "publications": [{"entity": "publication", "iuid": "6ead369695864c35962e785b3d220535", "links": {"self": {"href": "https://publications.scilifelab.se/publication/6ead369695864c35962e785b3d220535.json"}, "display": {"href": "https://publications.scilifelab.se/publication/6ead369695864c35962e785b3d220535"}}, "title": "Insights into the Exfoliation Process of V2O5\u00b7nH2O Nanosheet Formation Using Real-Time 51V NMR.", "authors": [{"family": "Etman", "given": "Ahmed S", "initials": "AS", "orcid": "0000-0003-0358-2379", "researcher": {"href": "https://publications.scilifelab.se/researcher/08d17b9094384dae8b7e3d21881d9925.json"}}, {"family": "Pell", "given": "Andrew J", "initials": "AJ", "orcid": "0000-0002-2542-8113", "researcher": {"href": "https://publications.scilifelab.se/researcher/47ef8c845de84d3ba40fddefbfb9511f.json"}}, {"family": "Svedlindh", "given": "Peter", "initials": "P"}, {"family": "Hedin", "given": "Niklas", "initials": "N", "orcid": "0000-0002-7284-2974", "researcher": {"href": "https://publications.scilifelab.se/researcher/36ec1b6fa2654626b17b88e7c9d18412.json"}}, {"family": "Zou", "given": "Xiaodong", "initials": "X", "orcid": "0000-0001-6748-6656", "researcher": {"href": "https://publications.scilifelab.se/researcher/b9bd566204e3499db43d53f2adf626e0.json"}}, {"family": "Sun", "given": "Junliang", "initials": "J", "orcid": "0000-0003-4074-0962", "researcher": {"href": "https://publications.scilifelab.se/researcher/a32bff2dca5e4ce19ae4147166594fd2.json"}}, {"family": "Bernin", "given": "Diana", "initials": "D", "orcid": "0000-0002-9611-2263", "researcher": {"href": "https://publications.scilifelab.se/researcher/7ad134b1d8ab41b8a8a3318801d92e10.json"}}], "type": "journal article", "published": "2019-06-30", "journal": {"title": "ACS Omega", "issn": "2470-1343", "volume": "4", "issue": "6", "pages": "10899-10905", "issn-l": "2470-1343"}, "abstract": "Nanostructured hydrated vanadium oxides (V2O5\u00b7nH2O) are actively being researched for applications in energy storage, catalysis, and gas sensors. Recently, a one-step exfoliation technique for fabricating V2O5\u00b7nH2O nanosheets in aqueous media was reported; however, the underlying mechanism of exfoliation has been challenging to study. Herein, we followed the synthesis of V2O5\u00b7nH2O nanosheets from the V2O5 and VO2 precursors in real time using solution- and solid-state 51V NMR. Solution-state 51V NMR showed that the aqueous solution contained mostly the decavanadate anion [H2V10O28]4- and the hydrated dioxovanadate cation [VO2\u00b74H2O]+, and during the exfoliation process, decavanadate was formed, while the amount of [VO2\u00b74H2O]+ remained constant. The conversion of the solid precursor V2O5, which was monitored with solid-state 51V NMR, was initiated when VO2 was in its monoclinic forms. The dried V2O5\u00b7nH2O nanosheets were weakly paramagnetic because of a minor content of isolated V4+. Its solid-state 51V signal was less than 20% of V2O5 and arose from diamagnetic V4+ or V5+.This study demonstrates the use of real-time NMR techniques as a powerful analysis tool for the exfoliation of bulk materials into nanosheets. A deeper understanding of this process will pave the way to tailor these important materials.", "doi": "10.1021/acsomega.9b00727", "pmid": "31460187", "labels": {"Swedish NMR Centre": "Service"}, "xrefs": [{"db": "pmc", "key": "PMC6648752"}], "notes": [], "created": "2023-05-31T16:31:06.247Z", "modified": "2025-10-17T13:03:57.821Z"}]}