Effect of oxygen functionalisation on the electrochemical behaviour of multiwall carbon nanotubes for alcohol oxidation reactions

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 78403-78408 ◽  
Author(s):  
Bryan H. R. Suryanto ◽  
Chuan Zhao
Keyword(s):  
Carbon Nanotubes ◽  
Oxidation Process ◽  
Electrochemical Behaviour ◽  
Multiwall Carbon Nanotubes ◽  
Surface Oxidation ◽  
Alcohol Oxidation ◽  
Oxidation Reactions ◽  
Oxidation Of Alcohols ◽  
Effect Of Oxygen ◽  
Multiwall Carbon

Enhanced electrocatalytic oxidation of alcohols observed at multiwall carbon nanotubes following simple surface oxidation process.

Electrochemical degradation of naproxen from water by anodic oxidation with multiwall carbon nanotubes glassy carbon electrode

2019 ◽  
Vol 79 (3) ◽  
pp. 480-488 ◽  
Author(s):  
Eva Díaz ◽  
Sonia Stożek ◽  
Yolanda Patiño ◽  
Salvador Ordóñez
Keyword(s):  
Carbon Nanotubes ◽  
Anodic Oxidation ◽  
Oxidation Process ◽  
Ph Effect ◽  
Multiwall Carbon Nanotubes ◽  
Reaction Conditions ◽  
Constant Potential ◽  
Optimized Conditions ◽  
Positive Effect ◽  
Multiwall Carbon

Abstract Naproxen (NPX) degradation was investigated by anodic oxidation both at constant potential and by cyclic voltammetry, using this last technique for optimizing reaction conditions and catalyst properties. Three multiwall carbon nanotubes (MWCNTs)-promoted electrodes were used (MWCNT, MWCNT-COOH and MWCNT-NH2) and a two steps oxidation process was observed in all the cases. At the optimized conditions (volume of MWCNT = 15 μL), the influence of the scan rate indicates the diffusion–adsorption control of the process. Likewise, the kinetic study of NPX degradation at fix potential, considering two different stirring speeds (250 and 500 rpm), indicates that degradation rate increases with the stirring speed. After 20 h, NPX is degraded even an 82.5%, whereas the mineralization reaches almost 70%, as it was obtained from total organic carbon analysis. The pH effect was also analysed, in the range 5–11, observing a positive effect at low pH. Concerning the surface chemistry of the electrode, MWCNT-NH2, with the highest isoelectric point (4.70), is the most promising material due to the improved interactions with the reactant. From these observations, a pathway is proposed, which includes two steps of electrochemical oxidation followed by subsequent oxidation steps, until mineralization of the NPX, attributed mainly to active chlorine species and ·OH.

Unusual synergetic effect of nickel single atoms on the electrocatalytic activity of palladium for alcohol oxidation reactions in alkaline media

2018 ◽  
Vol 54 (87) ◽  
pp. 12404-12407 ◽  
Author(s):  
Thantakorn Nitaya ◽  
Yi Cheng ◽  
Shanfu Lu ◽  
Kunakorn Poochinda ◽  
Kejvalee Pruksathorn ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrocatalytic Activity ◽  
Synergetic Effect ◽  
Alcohol Oxidation ◽  
Pd Nanoparticles ◽  
Alkaline Media ◽  
Oxidation Reactions ◽  
Single Atoms ◽  
Oxidation Of Alcohols

Ni single atoms encapsulated in carbon nanotubes substantially enhance the activity of Pd nanoparticles for oxidation of alcohols in alkaline media.

Boehmite Nanofibers as a Dispersant for Nanotubes in an Aqueous Sol

2018 ◽  
Author(s):  
Gen Hayase
Keyword(s):  
Carbon Nanotubes ◽  
Aspect Ratio ◽  
Aqueous Solutions ◽  
High Aspect Ratio ◽  
Multiwall Carbon Nanotubes ◽  
Multiwall Carbon ◽  
Nanotube Films

By exploiting the dispersibility and rigidity of boehmite nanofibers (BNFs) with a high aspect ratio of 4 nm in diameter and several micrometers in length, multiwall-carbon nanotubes (MWCNTs) were successfully dispersed in aqueous solutions. In these sols, the MWCNTs were dispersed at a ratio of about 5–8% relative to BNFs. Self-standing BNF–nanotube films were also obtained by filtering these dispersions and showing their functionality. These films can be expected to be applied to sensing materials.

scholarly journals Comparative study of using Water-Based mud containing Multiwall Carbon Nanotubes versus Oil-Based mud in HPHT fields

2016 ◽  
Vol 25 (4) ◽  
pp. 459-464 ◽  
Author(s):  
M.I. Abduo ◽  
A.S. Dahab ◽  
Hesham Abuseda ◽  
Abdulaziz M. AbdulAziz ◽  
M.S. Elhossieny
Keyword(s):  
Carbon Nanotubes ◽  
Comparative Study ◽  
Multiwall Carbon Nanotubes ◽  
Water Based ◽  
Multiwall Carbon
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