TY - JOUR
T1 - Grafting chelating groups on 2D carbon for selective heavy metal adsorption
AU - Shibahara, Risa
AU - Kamiya, Kazuhide
AU - Nishina, Yuta
N1 - Funding Information:
We are grateful to Dr Seiji Obata, Dr Hideaki Nagare, and Mr Koichiro Kubo for their help with the instrumentation facilities. The XAFS measurements were performed in SPring-8 (Proposal No. 2020A1254). This research was supported by JSPS KAKENHI (20H05224) and JST CREST (JPMJCR18R3).
Publisher Copyright:
© The Royal Society of Chemistry 2021.
PY - 2021/10/21
Y1 - 2021/10/21
N2 - Iminodiacetic acid (IDA) is a tridentate ligand, which can capture metal ions by forming two fused five-membered chelate rings. In this study, we fixed IDA moieties onto a two-dimensional nanocarbon, graphene oxide (GO), to obtain materials with high and selective adsorption of metal ions. The synthesis conditions for the GO-IDA composites were optimized, then their structures were characterized by infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and CHN elemental analysis. In addition, the heavy-metal removal efficiency and selectivity of the GO-IDA composites with different length alkyl linkers between the GO and IDA were investigated. An aqueous solution containing 10 metal ions (Al, As, B, Cd, Cr, Cu, Mn, Pb, Se, and Zn) was used as a model for contaminated water at pH 7, and the interactions of the ions with GO-IDA were in the order of Cu > Pb > As > B > Zn > Al ≈ Se. The interaction between Cu and GO-IDA was confirmed by XPS and extended X-ray absorption fine structure (EXAFS), which showed that Cu was coordinated to IDA.
AB - Iminodiacetic acid (IDA) is a tridentate ligand, which can capture metal ions by forming two fused five-membered chelate rings. In this study, we fixed IDA moieties onto a two-dimensional nanocarbon, graphene oxide (GO), to obtain materials with high and selective adsorption of metal ions. The synthesis conditions for the GO-IDA composites were optimized, then their structures were characterized by infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and CHN elemental analysis. In addition, the heavy-metal removal efficiency and selectivity of the GO-IDA composites with different length alkyl linkers between the GO and IDA were investigated. An aqueous solution containing 10 metal ions (Al, As, B, Cd, Cr, Cu, Mn, Pb, Se, and Zn) was used as a model for contaminated water at pH 7, and the interactions of the ions with GO-IDA were in the order of Cu > Pb > As > B > Zn > Al ≈ Se. The interaction between Cu and GO-IDA was confirmed by XPS and extended X-ray absorption fine structure (EXAFS), which showed that Cu was coordinated to IDA.
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U2 - 10.1039/d1na00435b
DO - 10.1039/d1na00435b
M3 - Article
AN - SCOPUS:85117346946
SN - 2516-0230
VL - 3
SP - 5823
EP - 5829
JO - Nanoscale Advances
JF - Nanoscale Advances
IS - 20
ER -