Ni2P‐Modified Ta3N5 and TaON for Photocatalytic Nitrate Reduction

dc.contributor.author Wei, Lin
dc.contributor.author Adamson, Marquix
dc.contributor.author Vela, Javier
dc.contributor.author Vela, Javier
dc.contributor.department Ames Laboratory
dc.contributor.department Chemistry
dc.date 2020-05-07T23:04:35.000
dc.date.accessioned 2020-06-30T01:17:40Z
dc.date.available 2020-06-30T01:17:40Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2020
dc.date.embargo 2021-04-28
dc.date.issued 2020-04-28
dc.description.abstract <p>Self‐sustaining photocatalytic NO 3 ‐ reduction systems could become ideal NO 3 ‐ removal methods. Developing an efficient, highly active photocatalyst is the key to the photocatalytic reduction of NO 3 ‐ . In this work, we present the synthesis of Ni 2 P‐modified Ta 3 N 5 (Ni 2 P/Ta 3 N 5 ), TaON (Ni 2 P/TaON), and TiO 2 (Ni 2 P/TiO 2 ). Starting with a 2 mM (28 g/mL NO 3 ‐ ‐N) aqueous solution of NO 3 ‐ , as made Ni 2 P/Ta 3 N 5 and Ni 2 P/TaON display as high as 79% and 61% NO 3 ‐ conversion under 419 nm light within 12 h, which correspond to reaction rates per gram of 196 μmol g ‐1 h ‐1 and 153 μmol g ‐1 h ‐1 , respectively, and apparent quantum yields of 3–4%. Compared to 24% NO 3 ‐ conversion in Ni 2 P/TiO 2 , Ni 2 P/Ta 3 N 5 and Ni 2 P/TaON exhibit higher activities due to the visible light active semiconductor (SC) substrates Ta 3 N 5 and TaON. We also discuss two possible electron migration pathways in Ni 2 P/semiconductor heterostructures. Our experimental results suggest one dominant electron migration pathway in these materials, namely: Photo‐generated electrons migrate from the semiconductor to co‐catalyst Ni 2 P, and upshift its Fermi level. The higher Fermi level provides greater driving force and allows NO 3 ‐ reduction to occur on the Ni 2 P surface.</p>
dc.description.comments <p>This is the peer-reviewed version of the following article: Wei, Lin, Marquix Adamson, and Javier Vela. "Ni2P‐Modified Ta3N5 and TaON for Photocatalytic Nitrate Reduction." <em>ChemNanoMat </em>(2020), which has been published in final form at DOI: <a href="https://doi.org/10.1002/cnma.202000174" target="_blank">10.1002/cnma.202000174</a>. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/chem_pubs/1233/
dc.identifier.articleid 2239
dc.identifier.contextkey 17654176
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath chem_pubs/1233
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/14546
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/chem_pubs/1233/2020_VelaJavier_Ni2PModified.pdf|||Fri Jan 14 19:18:50 UTC 2022
dc.source.uri 10.1002/cnma.202000174
dc.subject.disciplines Chemistry
dc.subject.keywords NO3- reduction
dc.subject.keywords Ni2P photocatalysis
dc.subject.keywords Ta3N5
dc.subject.keywords TaON
dc.subject.keywords clean water
dc.title Ni2P‐Modified Ta3N5 and TaON for Photocatalytic Nitrate Reduction
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication b1daee7a-1960-41bd-a41e-6d4625912766
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
relation.isOrgUnitOfPublication 42864f6e-7a3d-4be3-8b5a-0ae3c3830a11
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