Journal
NANO LETTERS
Volume 15, Issue 11, Pages 7347-7354Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b03871
Keywords
Colloidal synthesis; ternary oxides; assembly; photoelectrochemistry; charge dynamics
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Funding
- Office of Science of the U.S. Department of Energy [DE-SC0004993]
- Office of Science, Office of Basic Energy Sciences of the U.S. Department of Energy [DE-AC02-05CH11231]
- Alexander von Humboldt Foundation
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Multicomponent oxides and their heterostructures are rapidly emerging as promising light absorbers to drive oxidative chemistry. To fully exploit their functionality, precise tuning of their composition and structure is crucial. Here, we report a novel solution-based route to nanostructured bismuth vanadate (BiVO4) that facilitates the assembly of BiVO4/metal oxide (TiO2, WO3, and Al2O3) nanocomposites in which the morphology of the metal oxide building blocks is finely tailored. The combination of transient absorption spectroscopy spanning from picoseconds to second time scales-and photoelectrochemical measurements reveals that the achieved structural tunability is key to understanding and directing charge separation, transport, and efficiency in these complex oxide heterostructured films.
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