Preparation and Characterization of Cobalt Modified Rectorite

Abstract:

Cobalt modified rectorite (Co@R) was prepared from sodium saturated rectorite (Na-R) with a two-step method of microwave-assisted ion-exchange and in-situ hydrolysis. The morphology, composite structure and pore properties of Co@R were observed with scanning electron microscopy (SEM), small angle X-ray Diffraction (XRD) and nitrogen adsorption-desorption isotherm. The adsorption ability and catalytic behavior of Co@R were studied with methyl blue (MB) as probe contaminant. The interstratified layered Na-R was stripped fully and the resultant material remained the layered structure with a slit-shaped pore between the layers of lamellar particles. The interlayer spacing d₀₀₁ of rectorite was increased successfully from 2.23 nm up to 2.72 nm. The Co@R has a BJH pore volume of 0.091 cm³ g^-1 resulting from the macropores and BET specific surface area of 28.5 m² g^-1. A set of test has shown that Co@R possesses the potential to become a good adsorbent and catalyst for activating peroxymonosulfate (PMS), removing organic pollutants efficiently.

• Periodical: Advanced Materials Research (Volume 773)
• Pages: 263-266
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.773.263
• Online since: September 2013
• Authors: Xiao Rong Zhao, Li Hua Zhu, He Qing Tang
• Keywords: BET, Clay, Cobalt, SEM, X-Ray Diffraction (XRD)

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