119th General Meeting of the KCS

Type Poster Presentation
Area 재료화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code MAT.P-349
Subject Intercalation of Halloysite Nanotubes by Sodium Acetate and Dimethyl Sulfoxide and Their Adsorption Ability for Dye Molecules
Authors 이건구, 이형욱, 노재근*
한양대학교 화학과, Korea
Abstract Halloysites have multi-walled nanotubes with an interlayer spacing of 10 Å that can be used for various applications, such as, additives in polymers and plastic, electronic components, drug delivery vehicles, adsorption of toxic compounds in water, and cosmetics. In this study, to enhance the adsorption ability of holloysite nanotubes (HNTs), we try to widen the interlayer spacing of HNTs by the insertion of a guest species in the interlayer region of HNTs with preservation of the layered structure, which is called intercalation. HNTs were intercalated by sodium acetate (SA_HNTs) and dimethyl sulfoxide (DMSO_HNTs). SA_HNTs were intercalated resulting from electrostatic repulsion in interlayers and DMSO_HNTs were intercalated by new hydrogen bonding with S=O groups and hydroxyl group of interlayers. It is expected that the intercalated HNTs significantly affect the adsorption of dye molecues (Methylene Blue) because the spacing of interlayers was widened. Intercalation and adsorption ability of HNTS for dye molecules were characterized by Fourier transformed infrared spectroscopy (FT-IR), Ultraviolet-visible spectroscopy (UV), X-ray diffraction (XRD), and Brunauer-Emmett-Teller (BET). FT-IR measurements demonstrated that the intercalation of HNTs was confirmed by the presence of C=O vibration peak at 1420 cm-1 and S=O vibration peak at 1043 cm−1. From UV measurements, raw_HNTs, SA_HNTs and DMSO_HNTs show significant difference in adsorption of dye molecules. We found that the intercalated HNTs for adsorption of dye molecules are more effective than raw_HNTS.
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