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  • Palladium-decorated hierarchical titania constructed from the metal-organic frameworks NH<inf>2</inf>-MIL-125(Ti) as a robust photocatalyst for hydrogen evolution

    Author(s)
    Yan, Baolin
    Zhang, Lijuan
    Tang, Zhiyong
    Al-Mamun, Mohammad
    Zhao, Huijun
    Su, Xintai
    Griffith University Author(s)
    Zhao, Huijun
    Al-Mamun, M
    Tang, Zhiyong
    Zhang, Lijuan
    Year published
    2017
    Metadata
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    Abstract
    Engineering metal-organic frameworks (MOFs) into hierarchical structured materials is crucial for providing a viable platform to construct efficient catalysts and broaden their applications in energy conversion and photocatalysis. Here, a simple and efficient solid-state pyrolysis of Ti-MOFs (NH2-MIL-125) sacrificial template combined with a photo-reduction process was developed to construct a series of hierarchical TiO2 decorated with Pd nanoparticles. The hierarchical TiO2 inherited the well-defined rounded rectangular submicron-tablet from NH2-MIL-125 precursor and was constituted of uniform anatase TiO2 nanoparticles ...
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    Engineering metal-organic frameworks (MOFs) into hierarchical structured materials is crucial for providing a viable platform to construct efficient catalysts and broaden their applications in energy conversion and photocatalysis. Here, a simple and efficient solid-state pyrolysis of Ti-MOFs (NH2-MIL-125) sacrificial template combined with a photo-reduction process was developed to construct a series of hierarchical TiO2 decorated with Pd nanoparticles. The hierarchical TiO2 inherited the well-defined rounded rectangular submicron-tablet from NH2-MIL-125 precursor and was constituted of uniform anatase TiO2 nanoparticles with an average size of 12 nm. Furthermore, the photocatalytic activity for the hydrogen production from water-methanol solution was improved by the optimization of the content of Pd as a cocatalyst, and the maximum was achieved with a Pd loading of 1.5%. The rate of H2 evolution of 1.5% Pd decorated hierarchical TiO2 (1.5% Pd/TiO2) reached to 979.7 μmol h−1 and 112.7 μmol h−1, under UV–vis light and simulated solar light, respectively. This unusual photocatalytic activity may be resulted from the positive synergetic effect of efficient light absorption, promoted separation and migration of photo-induced electron-hole carriers. The work highlights the potential of the MOFs-based hierarchical TiO2 in the photocatalytic water splitting under solar light.
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    Journal Title
    Applied Catalysis B: Environmental
    Volume
    218
    DOI
    https://doi.org/10.1016/j.apcatb.2017.07.020
    Subject
    Physical Chemistry not elsewhere classified
    Physical Chemistry (incl. Structural)
    Chemical Engineering
    Environmental Engineering
    Publication URI
    http://hdl.handle.net/10072/346276
    Collection
    • Journal articles

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