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- Publisher Website: 10.1063/5.0013142
- Scopus: eid_2-s2.0-85088156467
- PMID: 32668923
- WOS: WOS:000551927500001
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Article: Visible-light photocatalysis and charge carrier dynamics of elemental crystalline red phosphorus
Title | Visible-light photocatalysis and charge carrier dynamics of elemental crystalline red phosphorus |
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Authors | |
Issue Date | 2020 |
Publisher | AIP Publishing LLC. The Journal's web site is located at http://scitation.aip.org/content/aip/journal/jcp |
Citation | The Journal of Chemical Physics, 2020, v. 153 n. 2, p. article no. 024707 How to Cite? |
Abstract | Elemental red phosphorus (red P) is a new class of photocatalysts with a desirable bandgap of ∼1.7 eV and has a strong visible-light response. Here, we show that the efficiency of red P is limited by severe electron trapping at deep traps that are intrinsic to the different crystal facets of the red P. To overcome this, we synthesized the red P/RGO (reduced graphene oxide) composite in a one-step ampoule chemical vapor deposition synthesis that formed a conducive interface between the red P photocatalyst and the RGO acceptor for efficient interfacial charge transport. As substantiated through photoelectrochemical characterization and ultrafast (femtoseconds) transient absorption spectroscopy, the interfacing with RGO provided a rapid pathway for the photocharges in red P to be interfacially separated, thereby circumventing the slower the charge trapping process. As a result, up to a sevenfold increase in the photocatalytic hydrogen production rate (apparent quantum yield = 3.1% at 650 nm) was obtained for the red P/RGO relative to the pristine red P. |
Persistent Identifier | http://hdl.handle.net/10722/300916 |
ISSN | 2023 Impact Factor: 3.1 2023 SCImago Journal Rankings: 1.101 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Jing, L | - |
dc.contributor.author | Zhu, R | - |
dc.contributor.author | Ng, YH | - |
dc.contributor.author | Hu, Z | - |
dc.contributor.author | Teoh, WY | - |
dc.contributor.author | Phillips, DL | - |
dc.contributor.author | Yu, JC | - |
dc.date.accessioned | 2021-07-06T03:12:00Z | - |
dc.date.available | 2021-07-06T03:12:00Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | The Journal of Chemical Physics, 2020, v. 153 n. 2, p. article no. 024707 | - |
dc.identifier.issn | 0021-9606 | - |
dc.identifier.uri | http://hdl.handle.net/10722/300916 | - |
dc.description.abstract | Elemental red phosphorus (red P) is a new class of photocatalysts with a desirable bandgap of ∼1.7 eV and has a strong visible-light response. Here, we show that the efficiency of red P is limited by severe electron trapping at deep traps that are intrinsic to the different crystal facets of the red P. To overcome this, we synthesized the red P/RGO (reduced graphene oxide) composite in a one-step ampoule chemical vapor deposition synthesis that formed a conducive interface between the red P photocatalyst and the RGO acceptor for efficient interfacial charge transport. As substantiated through photoelectrochemical characterization and ultrafast (femtoseconds) transient absorption spectroscopy, the interfacing with RGO provided a rapid pathway for the photocharges in red P to be interfacially separated, thereby circumventing the slower the charge trapping process. As a result, up to a sevenfold increase in the photocatalytic hydrogen production rate (apparent quantum yield = 3.1% at 650 nm) was obtained for the red P/RGO relative to the pristine red P. | - |
dc.language | eng | - |
dc.publisher | AIP Publishing LLC. The Journal's web site is located at http://scitation.aip.org/content/aip/journal/jcp | - |
dc.relation.ispartof | The Journal of Chemical Physics | - |
dc.title | Visible-light photocatalysis and charge carrier dynamics of elemental crystalline red phosphorus | - |
dc.type | Article | - |
dc.identifier.email | Phillips, DL: phillips@hku.hk | - |
dc.identifier.authority | Phillips, DL=rp00770 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1063/5.0013142 | - |
dc.identifier.pmid | 32668923 | - |
dc.identifier.scopus | eid_2-s2.0-85088156467 | - |
dc.identifier.hkuros | 323193 | - |
dc.identifier.volume | 153 | - |
dc.identifier.issue | 2 | - |
dc.identifier.spage | article no. 024707 | - |
dc.identifier.epage | article no. 024707 | - |
dc.identifier.isi | WOS:000551927500001 | - |
dc.publisher.place | United States | - |