Reduced graphene oxide-based hydrogels for the efficient capture of dye pollutants from aqueous solutions

被引：387

作者：

Tiwari, Jitendra N. ^{[1
]}

Mahesh, Kandula ^{[1
]}

Le, Nhien H. ^{[1
]}

Kemp, K. Christian ^{[1
]}

Timilsina, Rupak ^{[2
]}

Tiwari, Rajanish N. ^{[3
]}

Kim, Kwang S. ^{[1
]}

机构：

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

[2] Pohang Univ Sci & Technol, Sch Interdisciplinary Biosci & Bio Engn, Pohang 790784, South Korea

[3] Toyota Technol Inst, Tempaku Ku, Nagoya, Aichi 4688511, Japan

来源：

CARBON | 2013年 / 56卷

关键词：

ACTIVATED CARBON; MALACHITE GREEN; GRAPHITE OXIDE; REACTIVE DYE; ADSORPTION; REMOVAL; FILMS; WATER; WASTEWATERS; NANOSHEETS;

D O I：

10.1016/j.carbon.2013.01.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Three dimensional (3D) reduced graphene oxide (RGO)-based hydrogels were synthesized by the reduction of graphene oxide using sodium ascorbate. During gelation, mono-, bi-, and trilayer graphene nanosheets self-assemble into a well-defined and interconnected 3D porous network through strong van der Waals and pi-pi interactions. The 3D RGO-based hydrogels showed a large surface area, and a uniform pore size distribution. The application of the 3D mesoporous material as an adsorbent for the removal of the organic dyes, methylene blue (MB) and rhodamine B (RhB), from aqueous solutions was investigated. The 3D RGO-based hydrogels showed excellent removal capabilities for MB (similar to 100%) and RhB (similar to 97%) due to adsorption through strong pi-pi stacking and anion-cation interactions. Toxicity tests show that the aqueous solutions purified by 3D RGO-based hydrogels are comparable to control experiments conducted using distilled water. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：173 / 182

页数：10

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