Adsorption potentials of synthesized Mg-Al double layered hydroxide (LDH) Nanoparticles

Authors

  • Mustapha D. Garba Department of Pure and Industrial chemistry, Bayero University Kano, Nigeria P.M.B 3011
  • Sadi A. Hassan Department of Pure and Industrial chemistry, Bayero University Kano, Nigeria P.M.B 3011
  • Sagir Hassan Department of Pure and Industrial chemistry, Bayero University Kano, Nigeria P.M.B 3011

Keywords:

Mg-Al LDH synthesis, Nano-particles, Nickel, Adsorption, Characterization

Abstract

Mg-Al double layered hydroxides (LDH) Nanoparticles have been synthesized using a coprecipitation method and characterized using X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and Fourier Transform Infra-Red (FT-IR). The results of the XRD and SEM for the crystallite particle size of LDH-NPs (nanoparticles) were in the region of ~20 nm attributed to the smaller sized particles. The FT-IR result showed absorption bands of a possible functional group responsible for LDH formation. The adsorption analysis using Ni2+ in aqueous solution over 3, 5 and 10 %.w/w (corresponds to 1.7x10-3, 2.8 x10-3 and 5.7x10-3 M respectively) Ni/LDH concentrations showed various degree of adsorption. Adsorption of ~95 % was achieved, which was measured using Microwave plasma Atomic emission spectroscope (MPAES) instrument. The effect of pH and contact time showed Ni2+ optimal adsorption on the LDHNPs at pH 10, with equilibrium established at 30 min. The absorption capacity signifies its application in catalysis, such as for dry reforming of methane, associated with high coke formations, and in environmental application for removal of heavy metals.

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Published

2022-06-30