121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-328
Subject Preparation of the carbamoyl phosphine oxide moiety functionalized nitrogen doped mesoporous graphene for removal of rare earth elements
Authors Hyunju Kim, Jihye Lee, Hyun Jung*
Department of Chemistry, Dongguk University, Korea
Abstract We successfully synthesized the the carbamoyl phosphine oxide moeity functionalized mesoporous grpahene (CMPO-NMG) with high surface area for selective removal of rare earth elements (REEs). Firstly, N-doped mesoporous graphene (NMG) was fabricated by hydrothermal reaction of graphene oxide (GO) combining with ammonium hydroxide and triblock copolymer (Pluronic P123). Then, the CMPO-NMG was obtained by amide coupling between the prepared NMG and triethylphonoaceatate. The obtained products were fully characterized with respect to their structural and morphological properties by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM). The Fourier transform infrared spectroscopy (FT-IR) measurements were used to prove the existence of amide bond in CMPO-NMG. Furthermore, we measured X-ray photoelectron spectroscopy (XPS) to analyse the elemental composition and the change of nitrogen configuration after functionalization of NMG. By measuring the N2 adsorption-desorption isotherm, we confirmed that the CMPO-NMG has mesoporous structure and high specific surface area. In order to evaluate the adsorption performance for REEs, the time-dependant adsorption capacity of the CMPO-NMG was investigated by using inductively coupled plasma mass spectrometry (ICP-MS).
E-mail hjgw922@naver.com