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Nanoscale Zero‐Valent Iron Particles Supported on Reduced Graphene Oxides by Using a Plasma Technique and Their Application for Removal of Heavy‐Metal Ions
Author(s) -
Li Jie,
Chen Changlun,
Zhang Rui,
Wang Xiangke
Publication year - 2015
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201500242
Subject(s) - zerovalent iron , nanoscopic scale , graphene , plasma , materials science , ion , metal , metal ions in aqueous solution , chemical engineering , nanotechnology , inorganic chemistry , metallurgy , chemistry , physics , adsorption , engineering , nuclear physics , organic chemistry
Nanoscale zero‐valent iron particles supported on reduced graphene oxides (NZVI/rGOs) from spent graphene oxide (GO)‐bound iron ions were developed by using a hydrogen/argon plasma reduction method to improve the reactivity and stability of NZVI. The NZVI/rGOs exhibited excellent water treatment performance with excellent removal capacities of 187.16 and 396.37 mg g −1 for chromium and lead, respectively. Moreover, the NZVI/rGOs could be regenerated by plasma treatment and maintained high removal ability after four cycles. X‐ray photoelectron spectroscopy analysis results implied that the removal mechanisms could be attributed to adsorption/precipitation, reduction, or both. Such multiple removal mechanisms by the NZVI/rGOs were attributed to the reduction ability of the NZVI particles and the role of dispersing and stabilizing abilities of the rGOs. The results indicated that the NZVI/rGOs prepared by a hydrogen/argon plasma reduction method might be an effective composite for heavy‐metal‐ion removal.