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Photocatalysis is a promising technology for addressing energy and environmental problems.However,traditional photocatalysts have low efficiency as they suffer from poor stability or fast recombination of excitons.Metal-organic frameworks(MOFs)might be a possible solution because of their large surface areas and downsized catalytic centers.[1] Metal-organic frameworks(MOFs)are a class of crystalline microporous materials consisting of metal ions or clusters coordinated to organic molecules.[2] The structure bears well-defined channels and rich functionalities.MOFs,such as ZIF-8 and HKUST-1,have been used for gas separation and catalysis.[3] However,the potential of MOFs in photocatalytic reaction has hardly been explored.In this work,new composites of MOFs and photocatalysts were synthesized.The photocatalytic activity was found to be enhanced for degradation of organic compounds as well as hydrogen evolution from water.The improvement was believed to be due to the separation of electrons and holes,large surface area and active catalytic sites on the MOF.