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Iron Oxide Supported Sulfhydryl‐Functionalized Multiwalled Carbon Nanotubes for Removal of Arsenite from Aqueous Solution
Author(s) -
Chen Bo,
Zhu Zhiliang,
Ma Jie,
Qiu Yanling,
Chen Junhong
Publication year - 2015
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402423
Subject(s) - aqueous solution , arsenite , oxide , chemistry , carbon nanotube , chemical engineering , inorganic chemistry , nanotechnology , materials science , organic chemistry , arsenic , engineering
Magnetic iron oxide/carbon nanotube (MI–CNT) hybrids have been successfully synthesized through a simple solid‐phase method by using as‐prepared CNTs (APCNTs). To further enhance the adsorption capacity for As III , MI–CNTs were subsequently functionalized by using an amino acid derivative (glutathione (GSH)) through a facile chemical route. CNTs not only act as a support for iron oxide but also significantly contribute to arsenic removal. The resulting GMI–CNTs possess simultaneously a high adsorption capacity and desirable magnetic properties, thus making them promising for use as an adsorbent to remove As III with significantly enhanced adsorption capacity (19.12 mg g −1 ) and desired magnetic separation properties ( M s =27.3 emu g −1 ). Adsorption studies indicated that the active sites on the surface of GMI–CNTs for As III are heterogeneous owing to the multiphase of Fe and the GSH functionalization. Therefore GMI–CNTs can potentially be used as a practical adsorbent for the decontamination of As III in water. The results of this study are highly important for practical applications of as‐prepared CNTs that contain catalyst nanoparticles.