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- Title
Highly defective carbon nanotubes with improved electrochemical properties by introduction of mesoporous holes on the side walls.
- Authors
Yao, Mengting; Li, Yuanyuan; Nie, Yating; Chen, Houqiang; Wang, Jiao; Chen, Rongsheng
- Abstract
Highly defective carbon nanotubes (HD-CNTs) are fabricated by template carbonization of polydopamine nanofilm coated on mesoporous titanium nitride nanotube arrays. With introduction of mesoporous holes on the side walls from the template, HD-CNTs exhibit much improved electrochemical properties. An ideal Nernst behavior toward [Fe(CN)6]3−/4− redox couple was observed on the HD-CNTs, with a heterogeneous charge transfer rate constant k0 greater than 0.5 cm/s that is among the fastest kinetics of electrode materials. Sensitive determination of dopamine has been demonstrated in the presence of ascorbic acid and uric acid, with a linear range of 0.1–180 μM, a detection limit of 0.074 μM (S/N = 3) and a sensitivity of 555 µA mM−1 cm−2. The excellent electrochemical activity should be attributed to the large number of exposed edge planes on the carbon nanofilm, the free-standing highly conductive titanium nitride architecture that is beneficial for electron transfer, mesoporous morphology that promotes the mass transfer between the nanotubes, and effective ion-accessible surface area.
- Subjects
CARBON nanotubes; TITANIUM nitride; CHARGE transfer; MASS transfer; CHARGE exchange; URIC acid
- Publication
Journal of Materials Science, 2022, Vol 57, Issue 44, p20567
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-022-07949-4