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      Effect of cobalt doping on photocatalytic water splitting activity of NiTi-layered double hydroxide

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      Effect_of_cobalt_doping_on_photocatalytic_water_splitting_activity_of_NiTi-layered_double_hydroxide.pdf
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      Author(s)
      Samuei, Sara
      Akbari, Sina Sadigh
      Ülker, E.
      Karadaş, Ferdi
      Date
      2022-03-17
      Source Title
      Catalysis Science & Technology
      Electronic ISSN
      2044-4761
      Publisher
      Royal Society of Chemistry
      Volume
      9
      Issue
      12
      Pages
      3044 - 3053
      Language
      English
      Type
      Article
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      Abstract
      Metal doping has been used as an effective strategy to tune the energy levels of semiconductors. Herein, we dope NiTi layered double hydroxide (NiTi-LDH) with cobalt to prepare a ternary LDH, CoNiTi-LDH, to enhance its photocatalytic performance towards both water oxidation and hydrogen evolution. A CoNiTi-LDH with smaller plate sizes and a higher degree of order is obtained, which allows the band gap to shrink from 2.7 eV to 2.4 eV. CoNiTi-LDH exhibits a photocatalytic water oxidation activity of 366 μmol g−1 h−1, which is more than two times higher than NiTi-LDH (166 μmol g−1 h−1). We observed that appropriate energy levels of CoNiTi-LDH allow it to be an efficient photocatalyst also for hydrogen evolution. We performed detailed characterization studies to elucidate the effect of Co-doping on photocatalytic activity.
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      http://hdl.handle.net/11693/111407
      Published Version (Please cite this version)
      https://doi.org/10.1039/D2CY00148A
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      • Department of Chemistry 707
      • Institute of Materials Science and Nanotechnology (UNAM) 2258
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