Niobium K-Edge X-ray Absorption Spectroscopy of Doped TiO2 Produced from Ilmenite Digested in Hydrochloric Acid

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dc.citation.issue32
dc.citation.volume7
dc.contributor.authorHaverkamp RG
dc.contributor.authorKappen P
dc.contributor.authorSizeland KH
dc.contributor.authorWallwork KS
dc.coverage.spatialUnited States
dc.date.accessioned2023-10-18T22:47:27Z
dc.date.accessioned2023-10-19T20:38:42Z
dc.date.available2022-08-04
dc.date.available2023-10-18T22:47:27Z
dc.date.available2023-10-19T20:38:42Z
dc.date.issued2022-08-16
dc.date.updated2023-10-18T22:42:35Z
dc.description.abstractNiobium doping of TiO2 creates a conductive material with many new energy applications. When TiO2 is precipitated from HCl solutions containing minor Nb, the Nb in solution is quantitatively deposited with the TiO2. Here, we investigate the structure of Nb doped in anatase and rutile produced from ilmenite digested in hydrochloric acid. Nb K-edge X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) are used to characterize the environment of 0.08 atom % Nb doped in TiO2. XANES shows clear structural differences between Nb-doped anatase and rutile. EXAFS for Nb demonstrates that Nb occupies a Ti site in TiO2 with no near neighbors of Nb. Hydrolysis of Ti and Nb from acid solution, followed by calcination, leads to a well dispersed doped material, with no segregation of Nb. Production of Nb-doped TiO2 by this method may be able to supply future demand for large quantities of the material and in energy applications where a low cost of production, from readily available natural resources, would be highly desirable.
dc.description.confidentialfalse
dc.format.extent28258-28264
dc.identifierhttps://www.ncbi.nlm.nih.gov/pubmed/35990431
dc.identifier.citationHaverkamp RG, Kappen P, Sizeland KH, Wallwork KS. (2022). Niobium K-Edge X-ray Absorption Spectroscopy of Doped TiO2 Produced from Ilmenite Digested in Hydrochloric Acid.. ACS Omega. 7. 32. (pp. 28258-28264).
dc.identifier.doi10.1021/acsomega.2c02676
dc.identifier.eissn2470-1343
dc.identifier.elements-typejournal-article
dc.identifier.harvestedMassey_Dark
dc.identifier.issn2470-1343
dc.identifier.urihttp://hdl.handle.net/10179/20348
dc.languageeng
dc.publisherAmerican Chemical Society
dc.publisher.urihttps://pubs.acs.org/doi/10.1021/acsomega.2c02676
dc.relation.isPartOfACS Omega
dc.rightsCC BY 4.0en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.subjectExtended X-ray absorption fine structure
dc.subjectMaterials
dc.subjectMinerals
dc.subjectOxides
dc.subjectTransition metals
dc.titleNiobium K-Edge X-ray Absorption Spectroscopy of Doped TiO2 Produced from Ilmenite Digested in Hydrochloric Acid
dc.typeJournal article
pubs.elements-id455447
pubs.organisational-groupOther
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