Preparation and Characterization of Amino-Functionalized Geopolymer Microspheres

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Bibliographische Detailangaben
Zeitschriftentitel:	IOP Conference Series: Materials Science and Engineering
Personen und Körperschaften:	Chen, M L, Ge, Y Y, Xue, G H, Xu, M X, Cui, X M
In:	IOP Conference Series: Materials Science and Engineering, 678, 2019, 1, S. 012114
Format:	E-Article
Sprache:	Unbestimmt
veröffentlicht:	IOP Publishing

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Zusammenfassung:	<jats:title>Abstract</jats:title> <jats:p>Geopolymer microspheres have the advantages of environmentally friendly, cost-effective, easily to synthesize and regenerate, which can be applied for adsorption of heavy metal ions from aqueous solution. In this study, the amino-functionalized metakaolin-based geopolymer microspheres (NH<jats:sub>2</jats:sub>-MGS) were synthesized by coupling agent method using N-βaminoethyl-γ-aminopropyltrimethoxysilane (AEAPTS). The influences of AEAPTS dosage and temperature on modification efficiency were investigated in detail, and the properties of NH<jats:sub>2</jats:sub>-MGS were characterized by SEM, EDS, BET, XRD and FTIR analysis. It is shown that amino groups were grafted onto the surface of geopolymer microspheres successfully, and the amount of amino groups grafted increased as the AEAPTS dosage further increasing to 15 wt% and the temperature to 70 °C. The BET specific surface area of NH<jats:sub>2</jats:sub>-MGS increased significantly from 23.78 to 63.78 m<jats:sup>2</jats:sup>/g with a corresponding increase of micropores and porosity, which have great potential as adsorbent for removal of heavy metal ions.</jats:p>
Umfang:	012114
ISSN:	1757-8981 1757-899X
DOI:	10.1088/1757-899x/678/1/012114