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      Defect-rich ZnO nanosheets of high surface area as an efficient visible-light photocatalyst

      , , , , ,
      Applied Catalysis B: Environmental
      Elsevier BV

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          Correlation between photoluminescence and oxygen vacancies in ZnO phosphors

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            Oxygen vacancy induced band-gap narrowing and enhanced visible light photocatalytic activity of ZnO.

            Oxygen vacancies in crystal have important impacts on the electronic properties of ZnO. With ZnO(2) as precursors, we introduce a high concentration of oxygen vacancies into ZnO successfully. The obtained ZnO exhibits a yellow color, and the absorption edge shifts to longer wavelength. Raman and XPS spectra reveal that the concentration of oxygen vacancies in the ZnO decreased when the samples are annealed at higher temperature in air. It is consistent with the theory calculation. The increasing of oxygen vacancies results in a narrowing bandgap and increases the visible light absorption of the ZnO. The narrowing bandgap can be confirmed by the enhancement of the photocurrent response when the ZnO was irradiated with visible light. The ZnO with oxygen vacancies are found to be efficient for photodecomposition of 2,4-dichlorophenol under visible light irradiation.
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              Photo-electrochemical hydrogen generation from water using solar energy. Materials-related aspects

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                Author and article information

                Journal
                Applied Catalysis B: Environmental
                Applied Catalysis B: Environmental
                Elsevier BV
                09263373
                September 2016
                September 2016
                : 192
                :
                : 8-16
                Article
                10.1016/j.apcatb.2016.03.040
                081a8f94-4c9b-4733-9964-567c486bdf26
                © 2016
                History

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