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High-Density Three-Dimension Graphene Macroscopic Objects for High-Capacity Removal of Heavy Metal Ions.
- Source :
-
Scientific Reports . 7/5/2013, p1-6. 6p. - Publication Year :
- 2013
-
Abstract
- The chemical vapor deposition (CVD) fabrication of high-density three-dimension graphene macroscopic objects (3D-GMOs) with a relatively low porosity has not yet been realized, although they are desirable for applications in which high mechanical and electrical properties are required. Here, we explore a method to rapidly prepare the high-density 3D-GMOs using nickel chloride hexahydrate (NiCl2·6H2O) as a catalyst precursor by CVD process at atmospheric pressure. Further, the free-standing 3D-GMOs are employed as electrolytic electrodes to remove various heavy metal ions. The robust 3D structure, high conductivity (~12 S/cm) and large specific surface area (~560 m2/g) enable ultra-high electrical adsorption capacities (Cd2+~434 mg/g, Pb2+~882 mg/g~ Ni2+~1,683 mg/g, Cu2+~3,820 mg/g) from aqueous solutions and fast desorption. The current work has significance in the studies of both the fabrication of high-density 3D-GMOs and the removal of heavy metal ions. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CHEMICAL vapor deposition
*GRAPHENE
*METAL ions
*HEAVY metals
*ELECTROLYSIS
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Database :
- Academic Search Index
- Journal :
- Scientific Reports
- Publication Type :
- Academic Journal
- Accession number :
- 91658363
- Full Text :
- https://doi.org/10.1038/srep02125