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Visible light photocatalytic water oxidation over complex perovskite Sr3BNb2O9 (B = Mg, Ca and Sr) doped with nitrogen

Abstract

Nitrogen doping has been frequently adopted as a useful strategy to endow wide band gap semiconductors with visible light photocatalytic activities. Nevertheless, factors that may influence the effects of nitrogen doping are seldom touched. In this work, we synthesized a series of complex perovskite Sr3BNb2O9 (B = Mg, Ca and Sr) and applied nitrogen doping strategies to these compounds. Our results suggest that a wealth of important parameters such as structural distortions, cation ordering, nitrogen uptake, visible light absorption and surface hydrophilicity are all strongly correlated with cations in the B site. Accommodating large Sr cations in the B site helps to reduce structural distortions and the level of cation ordering. It is also helpful to increase nitrogen uptake, visible light absorption and surface hydrophilicity, all of which seem to be responsible for a much higher photocatalytic activity for water oxidation reactions. The strong correlations between B site cations with aforementioned parameters open new playgrounds for design and development of efficient photocatalytic properties of these promising materials.

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Publication details

The article was received on 07 Sep 2019, accepted on 09 Oct 2019 and first published on 10 Oct 2019


Article type: Research Article
DOI: 10.1039/C9QI01151J
Inorg. Chem. Front., 2019, Accepted Manuscript

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    Visible light photocatalytic water oxidation over complex perovskite Sr3BNb2O9 (B = Mg, Ca and Sr) doped with nitrogen

    R. Wang, G. Lin and X. Xu, Inorg. Chem. Front., 2019, Accepted Manuscript , DOI: 10.1039/C9QI01151J

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