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Efficient photocatalytic hydrogen production over titanate/titania nanostructures modified with nickel

Authorized Users Only
2019
Authors
Dostanić, Jasmina
Lončarević, Davor
Pavlović, Vladimir B.
Papan, Jelena
Nedeljković, Jovan M.
Article (Accepted Version)
,
Elsevier
Metadata
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Abstract
Nickel-modified titanate/TiO2 catalysts were prepared by deposition of nickel ions onto hydrothermally prepared titanate supports, followed by hydrogen temperature-programmed reduction. Two different nickel precursors (hydroxide and carbonate) were used to tune reducibility and to vary the crystal phase structure of the final catalysts. The precursor reducibility and functional properties of the final catalysts were investigated systematically using various characterisation techniques. The results revealed a more facile reduction of the hydroxide precursor compared to its carbonate counterpart. Moreover, it was found that the formation of the anatase phase was favoured by the use of the hydroxide precipitation agent. The photocatalytic activity towards hydrogen production of the prepared catalysts was evaluated in the presence of 2-propanol under simulated solar light irradiation. A thorough study of the photocatalytic performance of the synthesised catalysts was conducted as a functio...n of the precipitation agent used and the reduction temperature applied. The catalyst with dominant anatase crystal phase displayed the highest photocatalytic activity with a maximum H2 production rate of 1040 μmol h−1 g−1, this being more than four times higher than that of its carbonate counterpart. The catalysts with titanate structure showed similar activity, independent of the precipitation method used. The nanotubular structure was found to be the dominant factor in the stability of photocatalysts under long-run working conditions.

Keywords:
Powders: chemical preparation / Nanocomposites / Titanium dioxide (TiO2) / Solar hydrogen production
Source:
Ceramics International, 2019, 45, 15, 19447-19455
Publisher:
  • Elsevier BV
Projects:
  • Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-45001)
  • Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-45020)
  • Modelling of different chromatographic systems with chemometrical approach in pharmaceutical analysis (RS-172052)
Note:
  • This is the peer-reviewed version of the article: J. Dostanić, D. Lončarević, V.B. Pavlović, J. Papan, J.M. Nedeljković, Efficient photocatalytic hydrogen production over titanate/titania nanostructures modified with nickel, Ceramics International (2019), doi: https://doi.org/10.1016/j.ceramint.2019.06.200
  • The published version: http://cer.ihtm.bg.ac.rs/handle/123456789/3272

DOI: 10.1016/j.ceramint.2019.06.200

ISSN: 02728842

WoS: 000483454200158

Scopus: 2-s2.0-85067699117
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/3273
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