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Au@Nb@HₓK₁₋ₓNbO₃ nanopeapods with near-infrared active plasmonic hot-electron injection for water splitting

Chen, Ying-Chu; Hsu, Yu-Kuei; Popescu, Radian; Gerthsen, Dagmar; Lin, Yan-Gu; Feldmann, Claus

Full-spectrum utilization of diffusive solar energy by a photocatalyst for environmental remediation and fuel generation has long been pursued. In contrast to tremendous efforts in the UV-to-VIS light regime of the solar spectrum, the NIR and IR areas have been barely addressed although they represent about 50% of the solar flux. Here we put forward a biomimetic photocatalyst blueprint that emulates the growth pattern of a natural plant—a peapod—to address this issue. This design is exemplified via unidirectionally seeding core-shell Au@Nb nanoparticles in the cavity of semiconducting H x K1−xNbO3 nanoscrolls. The biomimicry of this nanopeapod (NPP) configuration promotes near-field plasmon–plasmon coupling between bimetallic Au@Nb nanoantennas (the peas), endowing the UV-active H x K1−xNbO3 semiconductor (the pods) with strong VIS and NIR light harvesting abilities. Moreover, the characteristic 3D metal-semiconductor junction of the Au@Nb@H x K1−xNbO3 NPPs favors the transfer of plasmonic hot carriers to trigger dye photodegradation and water photoelectrolysis as proofs-of-concept. Such broadband solar spectral response renders the Au@Nb@H x K1−xNbO3 NPPs highly promising for widespread photoactive devices.

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Verlagsausgabe §
DOI: 10.5445/IR/1000080137
Veröffentlicht am 12.02.2018
DOI: 10.1038/s41467-017-02676-w
Zitationen: 11
Web of Science
Zitationen: 10
Zugehörige Institution(en) am KIT Institut für Anorganische Chemie (AOC)
Laboratorium für Elektronenmikroskopie (LEM)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2041-1723
KITopen-ID: 1000080137
HGF-Programm 43.22.02 (POF III, LK 01)
Erschienen in Nature Communications
Band 9
Heft 1
Seiten 232
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagworte Nanoparticle synthesis; Nanowires; Photocatalysis
Nachgewiesen in Scopus
Web of Science
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