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Plasmonic enhancement in BiVO4 photonic crystals for efficient water splitting.

Zhang L, Lin CY, Valev VK, Reisner E, Steiner U, Baumberg JJ - Small (2014)

Bottom Line: Photo-electrochemical water splitting is a very promising and environmentally friendly route for the conversion of solar energy into hydrogen.Within the scaffold of an inverse opal photonic crystal, the surface plasmon resonance is significantly enhanced by the photonic Bragg resonance.Nanophotonic photoanodes show AM 1.5 photocurrent densities of 3.1 ± 0.1 mA cm(-2) at 1.23 V versus RHE, which is among the highest for oxide-based photoanodes and over 4 times higher than the unstructured planar photoanode.

View Article: PubMed Central - PubMed

Affiliation: Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, UK.

No MeSH data available.


Related in: MedlinePlus

a) XRD pattern of the io-Mo:BiVO4, b) Raman spectra of the io-Mo:BiVO4, and c) Raman spectra of Mo:BiVO4 with and without Au NPs.
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fig03: a) XRD pattern of the io-Mo:BiVO4, b) Raman spectra of the io-Mo:BiVO4, and c) Raman spectra of Mo:BiVO4 with and without Au NPs.

Mentions: The X-ray diffraction (XRD) patterns of the io-Mo:BiVO4 films (Figure3a) can be matched to monoclinic BiVO4 (JCPDS No. 14–0688). The 2θ diffraction peaks of 28.8°, 30.5°, 35.2°, 39.8°, and 42.5° can be respectively indexed as (112), (004), (020), (211), and (015) planes of monoclinic BiVO4 structure, which is consistent with the literature.[16] No noticeable peaks from any secondary phases can be observed in the XRD pattern, indicating that Mo is substitutionally incorporated in BiVO4 facilitated by the very similar ionic radii of V5+ (0.36 Å) and Mo6+ (0.41 Å).[18] Raman spectra of these io-Mo:BiVO4 help identifying the doping sites in the crystal lattice (Figure 3b). The Raman mode at 829 cm−1 can be assigned to the symmetric stretching mode of VO4 units.[48] In io-Mo:BiVO4, the symmetric stretching mode shifts to lower wave number (826 cm−1) because Mo6+ (95.9 g mol-1) is heavier than V5+ (50.9 g mol−1), suggesting that Mo6+ substitutes V5+ in the VO43− tetrahedron.


Plasmonic enhancement in BiVO4 photonic crystals for efficient water splitting.

Zhang L, Lin CY, Valev VK, Reisner E, Steiner U, Baumberg JJ - Small (2014)

a) XRD pattern of the io-Mo:BiVO4, b) Raman spectra of the io-Mo:BiVO4, and c) Raman spectra of Mo:BiVO4 with and without Au NPs.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4510818&req=5

fig03: a) XRD pattern of the io-Mo:BiVO4, b) Raman spectra of the io-Mo:BiVO4, and c) Raman spectra of Mo:BiVO4 with and without Au NPs.
Mentions: The X-ray diffraction (XRD) patterns of the io-Mo:BiVO4 films (Figure3a) can be matched to monoclinic BiVO4 (JCPDS No. 14–0688). The 2θ diffraction peaks of 28.8°, 30.5°, 35.2°, 39.8°, and 42.5° can be respectively indexed as (112), (004), (020), (211), and (015) planes of monoclinic BiVO4 structure, which is consistent with the literature.[16] No noticeable peaks from any secondary phases can be observed in the XRD pattern, indicating that Mo is substitutionally incorporated in BiVO4 facilitated by the very similar ionic radii of V5+ (0.36 Å) and Mo6+ (0.41 Å).[18] Raman spectra of these io-Mo:BiVO4 help identifying the doping sites in the crystal lattice (Figure 3b). The Raman mode at 829 cm−1 can be assigned to the symmetric stretching mode of VO4 units.[48] In io-Mo:BiVO4, the symmetric stretching mode shifts to lower wave number (826 cm−1) because Mo6+ (95.9 g mol-1) is heavier than V5+ (50.9 g mol−1), suggesting that Mo6+ substitutes V5+ in the VO43− tetrahedron.

Bottom Line: Photo-electrochemical water splitting is a very promising and environmentally friendly route for the conversion of solar energy into hydrogen.Within the scaffold of an inverse opal photonic crystal, the surface plasmon resonance is significantly enhanced by the photonic Bragg resonance.Nanophotonic photoanodes show AM 1.5 photocurrent densities of 3.1 ± 0.1 mA cm(-2) at 1.23 V versus RHE, which is among the highest for oxide-based photoanodes and over 4 times higher than the unstructured planar photoanode.

View Article: PubMed Central - PubMed

Affiliation: Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, UK.

No MeSH data available.


Related in: MedlinePlus