期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 217, 期 -, 页码 439-446出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2012.03.073
关键词
Fe3O4; Superparamagnetic; Nanoparticles; Adsorbents; Arsenic removal
资金
- Natural Science Foundation of China (NSFC) [20731002, 20871016, 10876002, 91022006, 20973023]
- 111 Project [B07012]
- Program for New Century Excellent Talents in University
- Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) [200800070015, 20101101110031]
- Beijing Municipal Commission [Z09010300820902]
- key Laboratory of Functional Materials Physics and Chemistry (Jilin Normal University)
- Center of Analysis and Testing of Beihua University
Superparamagnetic ascorbic acid-coated Fe3O4 nanoparticles with a high specific surface area were successfully synthesized via an environmentally friendly hydrothermal route in the absence of any templates. The as-synthesized ascorbic acid-coated Fe3O4 nanoparticles have a diameter of less than 10 nm, thus leading to a high specific surface area of about 179 m(2)/g, which is even larger than those of well-defined mesoporous structures. The only used capped agent is ascorbic acid, which serves as a functionalized molecule to make sure the high dispersibility and stability of the ascorbic acid-coated Fe3O4 nanoparticles in aqueous solution. The ascorbic acid-coated Fe3O4 nanoparticles exhibit superparamagnetic properties at room temperature and saturation magnetization approaches 40 emu g(-1). The ascorbic acid-coated Fe3O4 nanoparticles were evaluated as an absorbent to remove heavy metal arsenic from wastewater. The adsorption data obeyed the Langmuir equation with a maximum adsorption capacity of 16.56 mg/g for arsenic (V), and 46.06 mg/g for arsenic (III). (C) 2012 Elsevier B.V. All rights reserved.
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