Dispersion of carbon nanotubes in low pH aqueous solutions by means of alumina-coated silica nanoparticles

Electrocatalytic oxidation of acetylsalicylic acid at multiwalled carbon nanotube-alumina-coated silica nanocomposite modified glassy carbon electrodes

“…The preparation of MWCNT-ACS nanocomposite modified GCEs has been described in our previous studies [32,33]. Before the surface modification, the 3 mm bare GCE was polished with 0.3 and 0.05 m alumina slurries and washed with deionized water several times.…”

“…One major barrier for fabricating CNT-based electrodes is the low solubility of CNTs in most common solvents. The dispersion of multiwalled carbon nanotubes (MWCNTs) in low pH aqueous solution with the aid of alumina-coated silica (ACS) and the attachment of multiwalled carbon nanotube-alumina-coated silica (MWCNT-ACS) on glassy carbon electrodes (GCE) have been reported in our previous study [32,33]. It has been demonstrated that the electrocatalytic behaviors of MWCNTs toward hydrogen peroxide and NADH oxidation are not impaired by their association with ACS.…”

Sensitive electrochemical determination of acetaminophen in pharmaceutical formulations at multiwalled carbon nanotube-alumina-coated silica nanocomposite modified electrode

“…The preparation of the MWCNT-ACS modified GCE has been described elsewhere [24,25]. Before the surface modification, the 3 mm bare GCE was polished with 0.3 and 0.05 m alumina slurries and washed with deionized water several times.…”

“…Among these, noncovalent methods are attractive because they preserve the inherent properties of the CNTs. Recently, we successfully dispersed multiwalled carbon nanotubes (MWCNTs) in low pH aqueous solution by means of alumina-coated silica (ACS) and self-assembled MWCNT-ACS nanocomposite onto the surface of glassy carbon electrodes (GCEs) [24,25] demonstrated that the electrocatalytic ability of MWCNTs are not impaired by the combination with ACS. In our previous work, the MWCNT-ACS nanocomposite was successfully applied to electrocatalytic detection of aspirin [26].…”

Aqueous stability of oxidized carbon nanotubes and the precipitation by salts

“…The annually increasing production and utilization of this kind of nano-material will inevitably result in the introduction of CNTs to the environment [14]. Especially, in recent years, there is an increasing interest in preparation and application of aqueous CNT dispersions [15][16][17][18][19][20]. With the development and appli-cation of CNT dispersions, the stabilized CNTs will inevitably be discharged in the environment.…”