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Back cover

Environmental Science: Nano Vol - 3 Issue - 5

Environmental Science: Nano Vol - 3 Issue - 4

Environmental Science: Nano Vol - 3 Issue - 3

Environmental Science: Nano Vol - 3 Issue - 2

Environmental Science: Nano Vol - 3 Issue - 1

Environmental Science: Nano Vol -2

Environmental Science: Nano Vol -1

Spectroscopic and theoretical studies on the counterion effect of Cu(ii) ion and graphene oxide interaction with titanium dioxide

Content Provider	Royal Society of Chemistry (RSC)
Author	Liang, Yu Wang, Xiangke Wang, Xiangxue Ai, Yuejie Li, Jiaxing Ji, Yongfei Hayat, Tasawar Alsaedi, Ahmed Yu, Shujun
Copyright Year	2016
Abstract	With the widespread use of graphene oxide (GO), it is inevitable that part of GO is released into the environment and co-exist with heavy metal ions as contaminants and is likely to be co-adsorbed on minerals and oxides. This study, for the first time, demonstrates the individual and mutual removal mechanism of GO and Cu(II) on titanium dioxide (TiO2) by batch experiments, spectroscopic analysis and density functional theory (DFT) computations. Electrostatic interaction and hydrogen bonding are the dominant modes of GO sorption onto TiO2, and the interaction of Cu(II) with TiO2 is mainly dominated by inner-sphere surface complexation. The presence of Cu(II) enhances GO coagulation on TiO2 and vice versa. The experimental results are further verified by DFT sorption energy (Es) calculations in the order (TiO2–GO)–Cu > TiO2–GO for GO interaction and (TiO2–GO)–Cu > TiO2–Cu for Cu(II) interaction. The mutual interaction is favorable for the simultaneous removal of GO and heavy metal ions by surface complexation between Cu(II) and oxygen-containing functional groups. These findings might facilitate better understanding of the co-removal behavior of carbon nanomaterials and heavy metal ions on oxides, which is crucial to decreasing the environmental toxicity of pollutants in the natural environment.
Starting Page	1361
Ending Page	1368
Page Count	8
File Format	HTM / HTML PDF
ISSN	20518153
Volume Number	3
Issue Number	6
Journal	Environmental Science: Nano
DOI	10.1039/c6en00297h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Graphene Heavy metals Titanium dioxide Density functional theory Hydrogen Sorption Flocculation Carbon Nanomaterials
Content Type	Text
Resource Type	Article
Subject	Environmental Science Materials Science

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