Determination of the Surface Coverage of Exfoliated Carbon Nanotubes by Surfactant Molecules in Aqueous Solution

Langmuir ◽  
2007 ◽  
Vol 23 (7) ◽  
pp. 3646-3653 ◽  
Author(s):  
Nadia Grossiord ◽  
Paul van der Schoot ◽  
Jan Meuldijk ◽  
Cor E. Koning
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Surface Coverage

scholarly journals Synthesis and Application of Highly Active Dithiooxamide Functionalised Multi-Walled Carbon Nanotubes Toward Mercury Removal from Aqueous Solution

2016 ◽  
Vol 59 (1) ◽  
pp. 23-29
Author(s):  
Mirabi Ali ◽  
Shokuhi Rad Ali ◽  
Siadati Seyyed Amir ◽  
Alavi Tabari Seyyed Ali
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Accurate Method ◽  
Highly Active ◽  
Highly Sensitive ◽  
Multi Walled Carbon Nanotubes ◽  
Loading Amount ◽  
Lower Temperature ◽  
Walled Carbon Nanotubes

Highly sensitive and accurate method has been applied for removal of toxic mercury(II) ionsin aqueous solution, using synthesised nanosorbent. Determination of mercury(II) was carried out by flameatomic absorption spectrometer. A nanosorbent multi-walled carbon nanotubes (MWCNT) was synthesisedby the reaction of dithiooxamide with functionalised multi-walled carbon nanotubes. Initially, the surfaceof the multi-walled carbon nanotubes was oxidised by a mixture of nitric and sulphuric acids and then wasfunctionalised using thionyl chloride. The ligand has been attached to the multi-walled carbon nanotubesin somewhat shorter time and lower temperature than previous reported methods. The sorbent wascharacterised by Fourier transmission infrared and scanning electron microscopy. In this research study,the effect of different parameters in removal of mercury(II) ions by nanosorbent, such as pH, amount ofnanosorbent, time and concentration of Hg(II), was investigated. Experiments show that the new MWCNTwith loading amount of 1.02 mmol/g is a powerful sorbent for removing the Hg(II) ions from water.

Determination of lead(II) in aqueous solution using carbon nanotubes paste electrodes modified with Amberlite IR-120

2011 ◽  
Vol 173 (3-4) ◽  
pp. 485-493 ◽  
Author(s):  
Marilene Elisa do Nascimento ◽  
Patrícia Benedini Martelli ◽  
Clascídia Aparecida Furtado ◽  
Adelina P. Santos ◽  
Luiz Fernando Cappa de Oliveira ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution

The microstructure of functionalized poLyacrylonitrile beads for bioseparations

1990 ◽  
Vol 48 (4) ◽  
pp. 1094-1095
Author(s):  
Eduardo A. Kamenetzky ◽  
David A. Ley
Keyword(s):  
Aqueous Solution ◽  
Affinity Chromatography ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Surface Coverage ◽  
Vacuum Impregnation ◽  
Thin Sections ◽  
Selective Staining ◽  
Low Viscosity ◽  
Diamond Knife

The microstructure of polyacrylonitrile (PAN) beads for affinity chromatography bioseparations was studied by TEM of stained ultramicrotomed thin-sections. Microstructural aspects such as overall pore size distribution, the distribution of pores within the beads, and surface coverage of functionalized beads affect performance properties. Stereological methods are used to quantify the internal structure of these chromatographic supports. Details of the process for making the PAN beads are given elsewhere. TEM specimens were obtained by vacuum impregnation with a low-viscosity epoxy and sectioning with a diamond knife. The beads can be observed unstained. However, different surface functionalities can be made evident by selective staining. Amide surface coverage was studied by staining in vapor of a 0.5.% RuO4 aqueous solution for 1 h. RuO4 does not stain PAN but stains, amongst many others, polymers containing an amide moiety.

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