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In Situ Phase-Induc...
In Situ Phase-Induced Spatial Charge Separation in Core-Shell Oxynitride Nanocube Heterojunctions Realizing Robust Solar Water Splitting
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Hou, Jungang (författare)
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Wu, Yunzhen (författare)
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Cao, Shuyan (författare)
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Liang, Fei (författare)
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Lin, Zheshuai (författare)
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Gao, Zhanming (författare)
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- Sun, Licheng, 1962- (författare)
- KTH,Kemi,Dalian Univ Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, Inst Artificial Photosynth, State Key Lab Fine Chem, Dalian 116024, Peoples R China
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(creator_code:org_t)
- 2017-05-09
- 2017
- Engelska.
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Ingår i: Advanced Energy Materials. - : WILEY-V C H VERLAG GMBH. - 1614-6832 .- 1614-6840. ; 7:17
- 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
- Efficient spatial charge separation is critical for solar energy conversion over solid photocatalysts. The development of efficient visible-light photocatalysts has been of immense interest, but with limited success. Here, multiband core-shell oxynitride nanocube heterojunctions composed of a tantalum nitride (Ta3N5) core and nitrogen-doped sodium tantalate (NaTaON) shell have been constructed via an in situ phase-induced etching chemical strategy. The photocatalytic water splitting performance of sub-20-nm Ta3N5@NaTaON junctions exhibits an extraordinarily high photocatalytic activity toward oxygen and hydrogen evolution. Most importantly, the combined experimental results and theoretical calculations reveal that the strong interfacial Ta-O-N bonding connection as a touchstone among Ta3N5@NaTaON junctions provides a continuous charge transport pathway rather than a random charge accumulation. The prolonged photoexcited charge carrier lifetime and suitable band matching between the Ta3N5 core and NaTaON shell facilitate the separation of photoinduced electron-hole pairs, accounting for the highly efficient photocatalytic performance. This work establishes the use of (oxy)nitride heterojunctions as viable photocatalysts for the conversion of solar energy into fuels.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- charge separation
- core-shell nanocubes
- heterojunctions
- oxynitride
- water splitting
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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