120th General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Exhibition Hall 2+3
Time 10월 19일 (목요일) 11:00~12:30
Code MAT.P-410
Subject Synthesis of Magnetite Halloysite Nanotube and its Application for the Removal of Heavy Metals
Authors HYUNG WOOK LEE, Jaegeun Noh*
Department of Chemistry, Hanyang University, Korea
Abstract A unique nanostructured magnesium oxide coated magnetite clay composite was synthesized by a simple method using chemicals such as iron(II) sulfate heptahydrate (FeSO4•7H2O), magnesium(II) nitrate hexahydrate [Mg(NO3)2•6H2O], tetraethyl orthosilicate (TEOS), and urea. A new type of magnetic halloysite nanotubes (M-HNT) was characterized using X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and ultraviolet–visible spectroscopy. The halloysite nanotubes (HNT) were functionalized by the carboxyl group to control aggregation and stabilization. HNT-COOH can be easily collected and separated by adjusting the solution pH without additional filtration, sonication, or centrifugation. By changing the solution pH, HNT-COOH was easily dispersed, and the aggregation process was reversible. M-HNT-COOH had excellent removal capacities towards a specific heavy metal. (Cr(VI), Cu(II)) and the adsorption capacities were as high as 312 mg g-1 for Cu(II), 79 mg g-1 for Cr(VI). In this study, we demonstrated that M-HNT-COOH nanocomposites can be used for the removal of heavy metals from waste water and can be reusable by a simple and fast magnetic separation.
E-mail winning07@hanyang.ac.kr