Water-Dispersible Magnetite-Reduced Graphene Oxide Composites for Arsenic Removal

被引：1729

作者：

Chandra, Vimlesh ^{[1
]}

Park, Jaesung ^{[1
]}

Chun, Young ^{[1
]}

Lee, Jung Woo ^{[1
]}

Hwang, In-Chul ^{[1
]}

Kim, Kwang S. ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Chem, Ctr Superfunct Mat, Pohang 790784, South Korea

来源：

ACS NANO | 2010年 / 4卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

arsenic removal; magnetite; superparamagnetic; graphene; ACTIVATED CARBON; GRAPHITE OXIDE; GROUND-WATER; IRON; NANOPARTICLES; ADSORPTION; SPECTRA; MEDIA;

D O I：

10.1021/nn1008897

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Magnetite-graphene hybrids have been synthesized via a chemical reaction with a magnetite particle size of similar to 10 nm. The composites are superparamagnetic at room temperature and can be separated by an external magnetic field. As compared to bare magnetite particles, the hybrids show a high binding capacity for As(III) and As(V), whose presence in the drinking water in wide areas of South Asia has been a huge problem. Their high binding capacity is due to the increased adsorption sites in the M-RGO composite which occurs by reducing the aggregation of bare magnetite. Since the composites show near complete (over 99.9%) arsenic removal within 1 ppb, they are practically usable for arsenic separation from water.

引用

页码：3979 / 3986

页数：8

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