Abstract
Cocatalysts play an important role in photocatalysis towards achieving enhanced efficiency and stability. The coupling of metal cocatalysts with semiconductor photocatalysts is the most proficient path to facilitate the separation of photoexcited electron-hole pairs and to suppress their recombination. Herein, a strategy for the preparation of copper-nickel-oxide photocatalyst, based on the metal organic framework (Cu-MOF-74), has been proposed. Hydrothermal treatment of copper-MOF and nickel salt resulted in coupling of a nickel oxide with a copper cocatalyst. As prepared nanomaterial absorbs light in a broad wavelength range, especially in the visible light range. The material exhibits an impressive activity towards photocatalytic and photoelectrochemical water splitting with hydrogen evolution (more than 1.5 mmol h−1 g−1 without platinum cocatalyst) as well as towards photocatalytic degradation of volatile organic compounds. Its activity has been confirmed also in the analysis of generated cathodic photocurrents, that reached almost 1 mA cm−2 in alkaline solution.
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