NDLI: One-pot preparation of a MnO<sub>2</sub>–graphene–carbon nanotube hybrid material for the removal of methyl orange from aqueous solutions

Content Provider	Royal Society of Chemistry (RSC)
Author	Liu, Yan Cui, Guijia Tian, Yaxi Yan, Shiqiang Luo, Chao
Copyright Year	2015
Abstract	This study presents a MnO2–graphene–carbon nanotube (MnO2–G–CNT) hybrid material synthesized in a simple one-pot reaction process by a chemical method. The resulting materials were characterized by different techniques, such as TEM, XRD, FTIR, XPS, and BET surface area measurement. The adsorption behaviors of methyl orange (MO) onto the MnO2–G–CNT were firstly systematically investigated and experimental results indicated that the material with the highest loading amount of MnO2 showed an excellent adsorption capacity toward MO. The adsorption kinetics could be well described by the pseudo-second-order model and the Freundlich isotherm model showed a better fit with experimental data than the Langmuir model and the maximum adsorption capacity was determined to be qmax = 476.19 mg g−1. The overall rate process was apparently influenced by intra-particle diffusion and external mass transfer. Moreover, the thermodynamic parameters indicated that the adsorption was spontaneous and exothermic and that the physical adsorption mechanisms included electrostatic interaction, which played a dominant role in the adsorption mechanism between MO and the hybrid material.
Starting Page	5484
Ending Page	5492
Page Count	9
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	39
Issue Number	7
Journal	New Journal of Chemistry
DOI	10.1039/c5nj00697j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	BET X-ray crystallography One-pot synthesis Freundlich Transmission electron microscopy Adsorption Exothermic process Langmuir CNT Methyl orange Diffusion Langmuir adsorption model
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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