The adsorption properties of Pb(II) and Cd(II) on functionalized graphene prepared by electrolysis method

The functionalized graphene (GNS PF6) was fabricated by simple and fast method of electrolysis with potassium hexafluorophosphate solution as electrolyte under the static potential of 15 V. The characterization results of transmission electron microscopy, atom force microscopy, X-ray photoelectron s...

Full description

Saved in:
Bibliographic Details
Published in:Journal of hazardous materials 2010-11, Vol.183 (1), p.923-930
Main Authors: Deng, Xiaojiao, Lü, Lili, Li, Hongwei, Luo, Fang
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Atomic beam spectroscopy
Cadmium
Cadmium - isolation & purification
Chemical engineering
Chemistry Techniques, Analytical
Diffraction
Electrolysis
Electrolysis - methods
Exact sciences and technology
Graphene
Graphite - chemistry
Isotherms
Kinetics
Lead
Lead - isolation & purification
Mathematical models
Pollution
Thermogravimetric analysis
Water Pollutants, Chemical - isolation & purification
X-rays
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The functionalized graphene (GNS PF6) was fabricated by simple and fast method of electrolysis with potassium hexafluorophosphate solution as electrolyte under the static potential of 15 V. The characterization results of transmission electron microscopy, atom force microscopy, X-ray photoelectron spectroscopy, X-ray powder diffraction, Raman spectroscopy and thermogravimetric analysis indicate that graphite rod was completely exfoliated to graphene layer containing 30 wt.% PF 6ˉ with the average thickness ca. 1.0 nm. Our sample of GNS PF6 was developed for the removal of Pb(II) or Cd(II) ions from water, and the determined adsorption capacities are 406.6 mg/g (pH = 5.1) for Pb(II) and 73.42 mg/g (pH = 6.2) for Cd(II), which is much higher than that by our previous sample of GNS C8P and carbon nanotube. The adsorption processes reach equilibrium in just 40 min and the adsorption isotherms are described well by Langmuir and Freundlich classical isotherms models.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2010.07.117