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  • Preparation of mesoporous TiO2–C composites as an advanced Ni catalyst support for reduction of 4-nitrophenol

    Author(s)
    Gao, W
    Li, W
    Xue, Z
    Pal, M
    Liu, Y
    Wang, C
    Wang, J
    Wang, S
    Wan, X
    Liu, Y
    Zhao, D
    Griffith University Author(s)
    Zhao, Dongyuan
    Year published
    2016
    Metadata
    Show full item record
    Abstract
    To overcome the aggregation and recovery problems and regulate the electronic and chemical properties of Ni nanoparticle catalysts, ordered mesoporous TiO2-C composites have been designed and synthesized as an advanced support, combined with the in situ loading and reduction of Ni nanoparticles via a multi-component co-assembly method. The resulting mesoporous Ni/TiO2-C composites exhibit a large surface area (∼340 m2 g-1), uniform pore size (∼4 nm), moderate pore volume (∼0.23 cm3 g-1), and magnetic saturation value of ∼5.1 emu g-1. The corresponding Ni content was varied in the range from 2 to 13 wt%. More importantly, the ...
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    To overcome the aggregation and recovery problems and regulate the electronic and chemical properties of Ni nanoparticle catalysts, ordered mesoporous TiO2-C composites have been designed and synthesized as an advanced support, combined with the in situ loading and reduction of Ni nanoparticles via a multi-component co-assembly method. The resulting mesoporous Ni/TiO2-C composites exhibit a large surface area (∼340 m2 g-1), uniform pore size (∼4 nm), moderate pore volume (∼0.23 cm3 g-1), and magnetic saturation value of ∼5.1 emu g-1. The corresponding Ni content was varied in the range from 2 to 13 wt%. More importantly, the mesoporous Ni/TiO2-C composites display high catalytic activity towards the reduction of 4-nitrophenol to 4-aminophenol with NaBH4. The maximum pseudo-first-order reaction rate constant that was obtained with mesoporous Ni/TiO2-C composites (13 wt% Ni) was calculated to be ∼0.40 min-1, which is much higher than that with Ni/C, TiO2-C and Ni/TiO2 composites. In addition, these catalysts were found to be stable for a long time and reusable several times.
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    Journal Title
    New Journal of Chemistry
    Volume
    40
    Issue
    5
    DOI
    https://doi.org/10.1039/c5nj02976g
    Subject
    Chemical sciences
    Publication URI
    http://hdl.handle.net/10072/408461
    Collection
    • Journal articles

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