4.7 Article

Visible-light-driven photocatalytic water oxidation over LaNbON2-LaMg2/3Nb1/3O3 solid solutions

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INORGANIC CHEMISTRY FRONTIERS
卷 8, 期 9, 页码 2365-2372

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d1qi00166c

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资金

  1. National Natural Science Foundation of China [51972233]
  2. Natural Science Foundation of Shanghai [19ZR1459200]
  3. Shanghai Science and Technology Commission [14DZ2261100]
  4. Fundamental Research Funds for the Central Universities

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Solid solutions between LaNbON2 and LaMg2/3Nb1/3O3 have been investigated for water oxidation under visible light illumination, showing improved photocatalytic activity. The formation of solid solutions provides a useful tool to steer photocatalytic performance and opens new opportunities for efficient photocatalysts development for solar energy conversions.
Solid solutions between LaNbON2 and LaMg2/3Nb1/3O3, i.e. (LaNbON2)(1-x)(LaMg2/3Nb1/3O3)(x) (0.0 <= x <= 1.0), have been investigated as photocatalysts for water oxidation into oxygen under visible light illumination (lambda >= 420 nm). Many important parameters are strongly correlated with solid solution levels, including band gap, nitrogen content, defect concentration,band edge alignments, etc. This offers us a useful tool to steer photocatalytic performance among these solid solutions. Much improved photocatalytic activity is noticed for (LaNbON2)(0.8)(LaMg2/3Nb1/3O3)(0.2) (x = 0.2), which gives an AQE as high as 0.53% at 420 +/- 20 nm. This useful strategy by forming solid solutions opens new playgrounds full of opportunities for the design and development of efficient photocatalysts for solar energy conversions.

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