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Biotemplated top-down assembly of hybrid Ni nanoparticles/N doping carbon on diatomite for enhanced catalytic reduction of 4-nitrophenol

Jiang, De Bin ; Liu, Xiaoying ; Yuan, Yunsong ; Feng, Li ; Ji, Junyi ; Wang, Jinshu ; Losic, Dusan ; Yao, Hong-Chang ; Zhang, Yu Xin

Chemical engineering journal (Lausanne, Switzerland : 1996), 2020-03, Vol.383, p.123156, Article 123156 [Periódico revisado por pares]

Elsevier B.V

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  • Título:
    Biotemplated top-down assembly of hybrid Ni nanoparticles/N doping carbon on diatomite for enhanced catalytic reduction of 4-nitrophenol
  • Autor: Jiang, De Bin ; Liu, Xiaoying ; Yuan, Yunsong ; Feng, Li ; Ji, Junyi ; Wang, Jinshu ; Losic, Dusan ; Yao, Hong-Chang ; Zhang, Yu Xin
  • Assuntos: 4-Nitrophenol ; Catalytic reduction reaction ; Diatomite ; N doping carbon ; Ni nanoparticles
  • É parte de: Chemical engineering journal (Lausanne, Switzerland : 1996), 2020-03, Vol.383, p.123156, Article 123156
  • Descrição: [Display omitted] •Novel biotemplated top-down assembly of Ni-based catalyst by the low-cost material and simple controllable process.•Well-dispersed Ni nanoparticle reduced from nickel silicate by in-situ pyrolysis of polyaniline layer.•The synergistic effect of well-dispersed Ni nanoparticles and N doping carbon layer for enhancing catalytic activity.•The DE/Ni/N-C-800 exhibited excellent catalytic activity and good stability in ten cycles. Biotemplated top-down assembly of hybrid Ni nanoparticles/N doping carbon on diatomite (DE/Ni/N-C) was synthesized and used to catalytically reduce 4-nitrophenol (4-NP) solution in presence of NaBH4. The uniform nickel silicate nanosheets uniformly grown on the diatomite with maintained porous structure, enlarging the specific surface area. The thin polyaniline layer was then controllably coated on the nickel silicate nanosheets. The well-dispersed Ni nanoparticles with mean diameter of 20.3 nm were reduced from nickel silicate nanosheets by carbon from polyaniline pyrolysis process. Meanwhile, the N doping carbon layer was in-situ generated outside of the Ni nanoparticles. In the catalytic reduction of 4-NP reaction, the DE/Ni/N-C-800 exhibited excellent catalytic activity with activity parameter 0.053 mg−1 s−1 and stability after ten cycles. The presented results show an enhanced catalytic behavior of the DE/Ni/N-C-800 prepared by the low-cost material and simple controllable process, which indicates their potential for environmental remediation applications.
  • Editor: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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