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Russian Journal of Physical Chemistry A

, Volume 93, Issue 9, pp 1778–1782 | Cite as

SnO2 Co-doped with Co and Ni: Synthesis, Characterization, and Catalytic Properties in Reduction of 4-Nitrophenol

  • R. Shaista
  • M. Bilal
  • S. Hussain
  • K. Aneela
  • F. Kanwal
  • S. ShujahEmail author
PHYSICAL CHEMISTRY OF NANOCLUSTERS AND NANOMATERIALS
  • 19 Downloads

Abstract

Co/SnO2, Ni/SnO2, and Ni-Co/SnO2 nanocatalysts have been synthesized by microwave mediated co-precipitation method, and characterized by FT-IR, XRD, EDX, SEM. Their catalytic properties were studied in the reduction of 4-nitrophenol with NaBH4. FT-IR spectra contain peaks in the region of 480–650 cm-1 due to the stretching vibrations of the metal–oxygen bond (Ni–O, Sn–O, and Co–O). The XRD analysis showed the characteristic peaks of SnO2 (tetragonal rutile structural type), become broader after doping with Ni and Co and suggested the formation of Ni–Co/SnO2 nanocatalyst having particle size in range of 4–6 nm. It is clear from EDX analysis that weight concentrations of Co, Ni, and Sn were close to nominal concentrations in the doped sample of Ni–Co/SnO2. The SEM images showed that particle size of nanocatalysts lay in nanoscale. Catalytic evaluation of prepared catalysts in the reduction of 4-nitrophenol was investigated by UV–Vis spectrophotometery. Ni–Co/SnO2 is an effective nanocatalyst for 4‑nitrophenol reduction to 4-aminophenol, with 90.5% conversion. The calculated rate constant (k) value of this catalyzed reaction is 1 × 10–2 s–1, following pseudo-first-order kinetic model.

Keywords:

Ni–Co/SnO2 catalyst microwave reduction 4-nitrophenol 

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • R. Shaista
    • 1
  • M. Bilal
    • 1
  • S. Hussain
    • 1
  • K. Aneela
    • 1
  • F. Kanwal
    • 2
  • S. Shujah
    • 1
    Email author
  1. 1.Department of Chemistry, Kohat University of Science and Technology, Khyber PakhtunkhwaKohatPakistan
  2. 2.Pakistan Council of Scientific and Industrial Research LabsPeshawarPakistan

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