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The photocatalytic performance and structural characteristics of nickel cobalt ferrite nanocomposites after doping with bismuth

Abbas, Naseem ; Rubab, Nida ; Kim, Ki-Hyun ; Chaudhry, Rabbania ; Manzoor, Suryyia ; Raza, Nadeem ; Tariq, Muhammad ; Lee, Jechan ; Manzoor, Shamaila

Journal of colloid and interface science, 2021-07, Vol.594, p.902-913 [Periódico revisado por pares]

United States: Elsevier Inc

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  • Título:
    The photocatalytic performance and structural characteristics of nickel cobalt ferrite nanocomposites after doping with bismuth
  • Autor: Abbas, Naseem ; Rubab, Nida ; Kim, Ki-Hyun ; Chaudhry, Rabbania ; Manzoor, Suryyia ; Raza, Nadeem ; Tariq, Muhammad ; Lee, Jechan ; Manzoor, Shamaila
  • Assuntos: Azo dye ; Bi-doped photocatalyst ; Photo-degradation ; Water pollution
  • É parte de: Journal of colloid and interface science, 2021-07, Vol.594, p.902-913
  • Descrição: [Display omitted] Here, a novel bismuth-doped nickel-cobalt ferrite (Ni0.5Co0.5Bi0.1Fe1.9O4) was synthesized using a sol-gel auto-combustion approach. The impact of bismuth substitution on the nickel-cobalt ferrite structural characteristics was investigated relative to the nickel-cobalt ferrite without bismuth substitution (Ni0.5Co0.5Fe2O4) based on diverse technical options (e.g., scanning electron microscopy-equipped with an energy dispersive X-ray spectrometer, X-ray diffraction, physisorption, and Fourier-transform infrared spectroscopy). Bismuth doping increased the surface area without affecting pore size. The X-ray diffraction pattern confirmed a nano-ferrite cubic spinel structure of the catalyst. Photodegradation of Congo red (CR) was tested using these nickel-cobalt ferrite catalysts under visible light across varying reaction parameters (e.g., pH, catalyst loading, dye concentration, and reaction time). The photo-degradation efficiency for CR in aqueous medium was the highest (98%) at pH 3 with 0.2 g catalyst loading in 100 mL under visible irradiation to reinforce the role of nanostructures as a potent photocatalyst (QY = 2.79 × 10−7 molecule photon−1). The kinetic reaction rate of Bi-doped spinel ferrite (3.5 µmol g−1 h−1) was1.25 times higher than those undoped materials. This study experimentally proved that the bismuth-doped nickel-cobalt ferrite photocatalyst is an effective option for removing industrial dyes.
  • Editor: United States: Elsevier Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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