Synthesis, Characterization and Adsorption Studies of Chlorine–doped Carbon Nanotubes

Abstract

Abstract-Chorine doped carbon nanotubes (CNTs) are synthesized to introduce dipole moment into the lattice of the CNTs to enhance interaction with cationic species in adsorption. Cobalt and silver co-catalyst supported on magnesium oxide (MgO) is used as growth promoter and their morphological features were studied using Raman spectroscopy, energy dispersive spectroscopy (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) spectroscopy. Equilibrium and thermodynamic batch adsorption experiments were carried out by studying the concentration, time and temperature effects. The morphological images of the doped carbon materials showed amorphous multiwall nanotubes with some crystalline regions that are attributable to the doping of the chlorine. The adsorption studies recorded a rapid uptake of Cr3+ by the carbon nanotubes h was mainly diffusion controlled. The thermodynamic studies suggested relatively low temperature (low energy) favoured sorption was exothermic with a physic-sorption mechanism.

Acetylene-sourced CVD-synthesised catalytically active graphene for electrochemical biosensing

“…Energy dispersive spectral (EDS) results of the as synthesised graphene sheets are presented in Figure S4 (Supporting information). EDS is an important tool for the determination of the elemental composition of the sample under analysis (Osikoya et al, 2015). However, it does not give any information about bonding types between the constituent elements.…”

Effect of the Morphology and Structure on the Microwave Absorbing Properties of Multiwalled Carbon Nanotube Filled Epoxy Resin Nanocomposites

“…The peak related to the plane (002), at 26º, is characteristic of graphitic materials and attributed to the distance between the concentric graphene sheets of multiwalled CNT. The interlayer distance parameter can be calculated by Bragg's law 20,25,26,27 . The intensity and width of peak are related to the number of layers, the variations in interlayer distance, the content network distortion and also to the orientation of CNT.…”

“…These reflections are attributed to the structure of individual layer of graphene walls. Peaks (hk0) present asymmetrically due to the curvature of CNT 25,26,27 . Figure 5 shows two long and narrow peaks centered around 26º.…”

Optimization of the adsorption of total organic carbon from produced water using functionalized multi-walled carbon nanotubes

“…The application of nanostructured carbon materials as adsorbents has gained global attention on a commercial scale with a special interest in carbon nanotubes (CNTs) due to their specific properties which can be utilized for specific functions, besides, their surface properties can be modified via purification and functionalization to tailor their surface affinity to multiple pollutants [21,22]. CNTs have been recognized for their excellent removal of pollutants from aqueous solution and have shown good adsorption properties towards organic pollutants [23]. The large adsorption capacity of CNTs has been mainly attributable to their pore structure, surface area and the existence of a wide spectrum of surface functional groups [24].…”