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Improving photocata...
Improving photocatalytic hydrogen generation of g-C3N4 via efficient charge separation imposed by Bi2O2Se nanosheets
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- Lin, Ci (författare)
- University of Hong Kong, China
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- Zhao, Xiaolong (författare)
- University of Hong Kong, China
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- Xiao, Yejun (författare)
- Chinese Academy of Sciences, China
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- Sattar, Shahid (författare)
- Linnéuniversitetet,Institutionen för fysik och elektroteknik (IFE)
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- Tang, Lei (författare)
- Tsinghua University, China
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- Nairan, Adeela (författare)
- Zhejiang Sci-Tech University, China
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- Guo, Yu (författare)
- University of Hong Kong, China
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- Xia, Mingyu (författare)
- University of Hong Kong, China
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- Canali, Carlo M. (författare)
- Linnéuniversitetet,Institutionen för fysik och elektroteknik (IFE)
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- Khan, Usman (författare)
- Zhejiang Sci-Tech University, China
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- Leung, Dennis Y.C. (författare)
- University of Hong Kong, China
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(creator_code:org_t)
- Elsevier, 2024
- 2024
- Engelska.
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Ingår i: Carbon. - : Elsevier. - 0008-6223 .- 1873-3891. ; 218
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Enabling highly efficient photocatalytic hydrogen production from solar-driven water splitting is of immense potential and environmental significance. However, the crucial issue of the low utilization efficiency of photogenerated charges in most photocatalysts, such as polymeric graphitic carbon nitride, g-C3N4 (CN), hampers the overall photocatalytic activity and hinders practical applications. To surmount this parasitic phenomenon, we develop a heterojunction-based strategy that improves the charge separation efficiency in CN. The heterostructure is constructed between thermally exfoliated CN and liquid phase exfoliated Bi2O2Se (BOS) via a solution-phase, electrostatically driven self-assembly process. The properly aligned band positions between the two components create a built-in electric field, which endows the composite with an enhanced charge separation efficiency. The optimized Pt-deposited heterostructure photocatalyst exhibits a hydrogen production rate of 6481 μmol h−1 g−1, and an apparent quantum efficiency of 11.65% at 420 nm, compared to those of Pt-deposited ECN (4595 μmol h−1 g−1, 6.64 %). We validate the efficient charge separation effect and the prolonged lifetime of photogenerated carriers in the heterostructure using a series of comprehensive characterizations across multiple timescales, thus, elucidating the origin of the observed photocatalytic activity. This demonstration offers valuable insights into improving the utilization efficiency of photogenerated charges for photocatalysis by heterostructure engineering with materials of distinct electronic configurations.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Condensed Matter Physics
- Kondenserade materians fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Carbon
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Lin, Ci
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Zhao, Xiaolong
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Xiao, Yejun
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Sattar, Shahid
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Tang, Lei
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Nairan, Adeela
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visa fler...
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Guo, Yu
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Xia, Mingyu
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Canali, Carlo M.
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Khan, Usman
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Leung, Dennis Y. ...
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Fysikalisk kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Den kondenserade ...
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Carbon
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Linnéuniversitetet