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In Situ Anchoring of Pyrrhotite on Graphitic Carbon Nitride Nanosheet for Efficient Immobilization of Uranium
Author(s) -
Hao Xuan,
Zhang Hongsen,
Liu Qi,
Liu Jingyuan,
Chen Rongrong,
Yu Jing,
Zhang Milin,
Liu Peili,
Wang Jun
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201804289
Subject(s) - nanosheet , in situ , uranium , pyrrhotite , graphitic carbon nitride , materials science , nitride , anchoring , carbon fibers , nanotechnology , environmental science , chemistry , metallurgy , engineering , sulfide , layer (electronics) , composite material , catalysis , organic chemistry , photocatalysis , composite number , biochemistry , structural engineering
Enrichment of U VI is an urgent project for nuclear energy development. Herein, magnetic graphitic carbon nitride nanosheets were successfully prepared by in situ anchoring of pyrrhotite (Fe 7 S 8 ) on the graphitic carbon nitride nanosheet (CNNS), which were used for capturing U VI . The structural characterizations of Fe 7 S 8 /CNNS‐1 indicated that the CNNS could prevent the aggregation of Fe 7 S 8 and the saturation magnetization was 4.69 emu g −1 , which meant that it was easy to separate the adsorbent from the solution. Adsorption experiments were performed to investigate the sorption properties. The results disclosed that the sorption data conformed to the Langmuir isotherm model with the maximum adsorption capacity of 572.78 mg g −1 at 298 K. The results of X‐ray photoelectron spectroscopy (XPS) demonstrated that the main adsorption mechanism are as follows: U VI is adsorbed on the surface of Fe 7 S 8 /CNNS‐1 through surface complexation initially, then it was reduced to insoluble U IV . Thereby, this work provided an efficient and easy to handle sorbent material for extraction of U VI .