Physico-Chemical Properties of Nano ZrO₂-Pillared Bentonite with Nickel as Supporting Metal

Abstract:

Bentonite was modified through intercalation and calcination using a ZrOCl₂ pillaring solution. To create nano Ni/ZrO₂-bentonite catalyst, ZrO₂ pillared bentonite was impregnated using Ni(NO₃)₂•6H₂O precursor first, then followed by calcination and reduction. The physical-chemical properties of the catalyst was characterized by XRD (X-ray Diffractometer), FT-IR (Fourier Transform Infrared), surface acidity with NH₃ vapor adsorption method, SAA (Surface Area Analyzer) and TEM (Transmission Electron Microscope). The results of characterization with XRD showed specific peaks for montmorillonite minerals with a monoclinic crystalline type and its chemical composition (Ca)(Al,Mg)₆(Si₄O₁₀)₃(OH)₆.nH₂O and after pillarization showed a shift in basal spacing d₀₀₁ to the left (angle 2θ <5°). The typical peak indicating basal spacing d₀₀₁ shift towards a smaller angle of 2θ was not very apparent after impregnation with nickel metal. Qualitative determination of acidity after adsorption of ammonia showed characteristics at 1404-1635 cm^-1 wavenumbers with increasingly sharp spectra indicating increased acidity of the catalyst (Brǿnsted and Lewis acids). Surface area showed a significant increase from 27.385 m²/g to 174.208 m²/g after pillarization and impregnation of nickel metal.

• Periodical: Nano Hybrids and Composites (Volume 30)
• Pages: 9-17
• DOI: https://doi.org/10.4028/www.scientific.net/NHC.30.9
• Online since: November 2020
• Authors: Mohamad Mirzan, Akhmad Syoufian, Karna Wijaya*
• Keywords: Bentonite, Intercalation, Nickel, Wet Impregnation, ZrO₂

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