Oxidation and stability of multi-walled carbon nanotubes in hydrogen peroxide solution

The effect of low‐defected carboxylic acid functional group–rich carbon nanotube–doped electrode on the performance of aqueous vanadium redox flow battery

“…Figure 4 shows the comparison between synthetic procedure and mechanism of carboxylic group functionalized CNT using the conventional acid treatment and MTMO process. First, H 2 O 2 decomposed two OH radicals at a high temperature, and the radicals attacked the surface of CNT, resulting in hydroxyl groups on the CNT (HP‐CNT) 72,73 . Next, N‐oxoammonium TEMPO, converted from TEMPO using NaClO, oxidized the hydroxyl groups on the HP‐CNT to aldehyde groups, and the aldehyde groups were converted to carboxylic groups by N‐oxoammonium TEMPO one more time 74,75 .…”

“…First, H 2 O 2 decomposed two OH radicals at a high temperature, and the radicals attacked the surface of CNT, resulting in hydroxyl groups on the CNT (HP-CNT). 72,73 Next, Noxoammonium TEMPO, converted from TEMPO using NaClO, oxidized the hydroxyl groups on the HP-CNT to aldehyde groups, and the aldehyde groups were converted to carboxylic groups by N-oxoammonium TEMPO one more time. 74,75 Due to the milder condition of MTMO, the TEMPO-CNT has low-defected feature compared to AT-CNT.…”

Selective carboxylation versus layer-by-layer unsheathing of multi-walled carbon nanotubes: new insights from the reaction with boiling nitrating mixture

“…Particularly, control over the kinetics and the selectivity of introducing oxygen functional groups onto CNTs is of high importance. 2 The significance derives from the fact that numerous applications, from biomedicine (drug/gene delivery, cell scaffolds) to electrical engineering to sensors, require CNTs of precise stoichiometry, tunable hydrophilization and biocompatibility. 3 Nearly three decades of research has shown that oxidation of CNTs is the most commonly reported method to overcome the problems related to their poor dispersibility, limited solvent/matrix compatibility and purity.…”

Electrocatalytic reduction of carbon dioxide on gold–copper bimetallic nanoparticles: Effects of surface composition on selectivity

“…The presence of oxygen-containing groups on it facilitates the exfoliation of MWCNT bundles and increases the solubility in polar media [72][73][74] . The atomic ratio of oxygen is not reported because it is expected the source of oxygen was not from the sample rather due to exposed with air during measurement.…”