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Efficient Ni–Fe layered double hydroxides/ZnO nanostructures for photochemical water splitting
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
Institute of Chemistry, University of Sindh, 76080, Jamshoro, Pakistan.
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2019 (English)In: Journal of Solid State Chemistry, ISSN 0022-4596, E-ISSN 1095-726X, Vol. 273, p. 186-191Article in journal (Refereed) Published
Abstract [en]

Zinc oxide (ZnO) nanostructures are widely investigated for photocatalytic applications but the functional properties are limited by the fast carrier recombination rate, which is an intrinsic property of ZnO. To optimize the recombination rate of ZnO, a study is carried out in which it is covered with Ni-Fe layered double hydroxides and synergistic effects are created which boosted the photocatalytic activity of ZnO. The nanostructured materials are synthesized by the low temperature aqueous chemical growth and electrodeposition methods. These nanostructures are characterized by scanning electron microscopy (SEM) and powder X-ray diffraction (XRD) technique. SEM study has revealed a Ni–Fe LDH coated ZnO NRs. The powder XRD has showed a cubic phase of the Ni-Fe layered double hydroxide on the ZnO NRs having an excellent crystalline quality. The optical characterization has shown low scattering of light for the Ni–Fe LDH coated ZnO NRs sample. The sample prepared with deposition time of 25 s showed excellent photochemical water splitting properties compared to counter photo-anodes in alkaline media. The photo response was highly stable and fast. The incident photon to current conversion efficiency for the photo-anode of Ni–Fe(LDHs)/ZnO over 25 s was 82% at a maximum absorption of 380 nm compared to the pristine ZnO NRs which has 70% at the same wavelength. This study is providing a simple, cost effective, earth abundant and environment friendly methodology for the fabrication of photo-anodes for diverse applications specifically water oxidation and solar radiation driven water splitting.

Place, publisher, year, edition, pages
Academic Press, 2019. Vol. 273, p. 186-191
Keywords [en]
ZnO nanorods, Ni–Fe layered double hydroxides, Photochemical water splitting
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-155658DOI: 10.1016/j.jssc.2019.03.004ISI: 000466261100027Scopus ID: 2-s2.0-85062437722OAI: oai:DiVA.org:liu-155658DiVA, id: diva2:1298422
Note

Funding agencies:  department of Science and Technology, Campus Norrkoping, Linkoping University, Sweden

Available from: 2019-03-22 Created: 2019-03-22 Last updated: 2019-06-22Bibliographically approved

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Elhag, SamiWillander, MagnusNur, Omer

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