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.department | Ames National Laboratory | |
dc.contributor.department | Chemistry | |
dc.contributor.department | Ames Laboratory | |
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 |
File
Original bundle
1 - 1 of 1
No Thumbnail Available
- Name:
- 2020_VelaJavier_Ni2PModified.pdf
- Size:
- 2 MB
- Format:
- Adobe Portable Document Format
- Description: