Synthesis and Characterization of Montmorillonite Inorgano-Intercalation Compound Assisted by Microwave Irradiation
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2010年第3期
论文作者：曹明礼
文章页码：444 - 448
摘 要：A montmorillonite inorgano-intercalation compound（MIIC） was synthesized by using a purified Na-exchanged bentonite（PNaB） as a matrix and Al-pillaring ion as an intercalating reagent under microwave irradiation.The synthesized products were characterized by X-ray diffraction（XRD）,27Al magic angle sample-spinning nuclear magnetic resonance（27Al MAS NMR）,specific surface area（BET） measurement,and adsorption density determination.The results show that,at 5% solid（PNaB） concentration and 7 minutes irradiation in a 130 W microwave oven,the basal spacing d（001） of the synthesized MIIC increases to 1.740 nm from the original 1.218 nm of PNaB.The MIIC has much higher adsorptive densities to F-and Cr6+ from aqueous solution than the PNaB.The adsorption isotherm of F-on the MIIC follows the Freundlich equation,and the increased adsorption is mainly due to the porous structure of the MIIC which created larger adsorption surfaces.The adsorption isotherm of Cr6+ on MIIC follows the Langmuir equation and the adsorption is mainly monolayer as a result of chemisorptions.
曹明礼
School of Resources and Environmental Engineering,Wuhan University of Technology
摘 要：A montmorillonite inorgano-intercalation compound（MIIC） was synthesized by using a purified Na-exchanged bentonite（PNaB） as a matrix and Al-pillaring ion as an intercalating reagent under microwave irradiation.The synthesized products were characterized by X-ray diffraction（XRD）,27Al magic angle sample-spinning nuclear magnetic resonance（27Al MAS NMR）,specific surface area（BET） measurement,and adsorption density determination.The results show that,at 5% solid（PNaB） concentration and 7 minutes irradiation in a 130 W microwave oven,the basal spacing d（001） of the synthesized MIIC increases to 1.740 nm from the original 1.218 nm of PNaB.The MIIC has much higher adsorptive densities to F-and Cr6+ from aqueous solution than the PNaB.The adsorption isotherm of F-on the MIIC follows the Freundlich equation,and the increased adsorption is mainly due to the porous structure of the MIIC which created larger adsorption surfaces.The adsorption isotherm of Cr6+ on MIIC follows the Langmuir equation and the adsorption is mainly monolayer as a result of chemisorptions.
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