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SYNTHESIS AND PHYSICOCHEMICAL PROPERTIES OF Zn-HECTORITE

Both refluxing reaction under atmospheric pressure and hydrothermal reaction underautogenous water vapor pressure of two kinds of starting slurry with the initial molar ratio Na: Zn: Li: Si =0.7: 5.4: 0.6: 8.0 and 1.4: 5.4: 1.2: 8.0 made from Zn-Si homogeneous precipitates, lithium fluoride and sodi...

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Published in:	Clay Science 2004, Vol.12(5), pp.285-291
Main Authors:	NAKAKUKI, TAKAHITO, FUJIMURA, KAORI, AISAWA, SUMIO, HIRAHARA, HIDETOSHI, NARITA, EIICHI
Format:	Article
Language:	English
Subjects:	Cation exchange capacity Earth sciences Earth, ocean, space Exact sciences and technology Hydrothermal reaction Methylene blue adsorptive ability Mineralogy Refluxing reaction Silicates Smectite Zn-hectorite
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container_title	Clay Science
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creator	NAKAKUKI, TAKAHITO FUJIMURA, KAORI AISAWA, SUMIO HIRAHARA, HIDETOSHI NARITA, EIICHI
description	Both refluxing reaction under atmospheric pressure and hydrothermal reaction underautogenous water vapor pressure of two kinds of starting slurry with the initial molar ratio Na: Zn: Li: Si =0.7: 5.4: 0.6: 8.0 and 1.4: 5.4: 1.2: 8.0 made from Zn-Si homogeneous precipitates, lithium fluoride and sodium hydroxide successfully have yielded Zn-hectorites containing Zn2+ instead of Mg2+ in the trioctahedral sheets. Zn-hectorites have expansion of the basal spacing (door) by the treatment with ethylene glycol on powder X-ray diffraction (XRD) patterns, and characterized by Zn-O vibration in the around 660-670cm-1 on fourier transform infrared spectrometer (FT-IR) spectra, peaks assigned to Zn2p on X-ray photoelectron spectrometer (XPS) spectra and thermal dehydroxylationat lower temperature on thermogravimetry and differential thermal analysis (TG-DTA). It hasalso clarified that Zn-hectorite synthesized by hydrothermal reaction under autogenous water vapor pressure is relatively large massive particles and has a larger CEC, although it has lower MB adsorptive ability compared to a commercial Mg-hectorite as reference.
doi_str_mv	10.11362/jcssjclayscience1960.12.285
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Zn-hectorites have expansion of the basal spacing (door) by the treatment with ethylene glycol on powder X-ray diffraction (XRD) patterns, and characterized by Zn-O vibration in the around 660-670cm-1 on fourier transform infrared spectrometer (FT-IR) spectra, peaks assigned to Zn2p on X-ray photoelectron spectrometer (XPS) spectra and thermal dehydroxylationat lower temperature on thermogravimetry and differential thermal analysis (TG-DTA). 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subjects	Cation exchange capacity Earth sciences Earth, ocean, space Exact sciences and technology Hydrothermal reaction Methylene blue adsorptive ability Mineralogy Refluxing reaction Silicates Smectite Zn-hectorite
title	SYNTHESIS AND PHYSICOCHEMICAL PROPERTIES OF Zn-HECTORITE
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