Fabrication of Polyaniline/Carbon Nanotubes Composites Using Carbon Nanotubes Films Obtained by Electrophoretic Deposition

In this study, we report a facile electrochemical method to obtain polyaniline/single-wall carbon nanotubes (PANI/SWCNTs) composite electrodes by combining the electroreduction of diazonium salts and electropolymerization of conductive polymers. In a first step, the SWCNTs are covalently functionalized with diphenyl amine through the electrochemical reduction of the 4-aminodiphenylamine diazonium salt in order to provide anchors for the subsequent polymer electrodepostion. The aniline oxidation remains possible on this grafted layer and PANI can easily be deposited on the diphenyl amine-modified electrodes. The electrochemically deposited PANI/SWCNTs composites exhibit excellent electrochemical charge storage properties making them promising electrode materials for high power supercapacitors.

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MORPHOLOGY EFFECT OF Ni–Ag/CARBON NANOMATERIALS ON THEIR ELECTROCATALYTIC ACTIVITY FOR GLUCOSE OXIDATION

Surface Review and Letters ◽

10.1142/s0218625x16500591 ◽

2016 ◽

Vol 23 (06) ◽

pp. 1650059 ◽

Cited By ~ 3

Author(s):

RUIZHUO OUYANG ◽

WEIWEI LI ◽

YANG YANG ◽

WANGYAO ZHANG ◽

KAI FENG ◽

...

Keyword(s):

Carbon Nanotubes ◽

Surface Morphology ◽

Active Sites ◽

Carbon Nanomaterials ◽

Modified Electrodes ◽

Single Wall Carbon Nanotubes ◽

Composite Electrodes ◽

Ag Nps ◽

Multi Wall Carbon Nanotubes ◽

Ag Deposition

We presented here three carbon-nanomaterials-based modified glassy carbon electrodes (GCE) with Ni–Ag nanohybrid nanoparticles (NPs) deposited upon, including single-wall carbon nanotubes (SWCNTs), multi-wall carbon nanotubes (MWCNTs) and the mesoporous carbons (MPCs), and compared their morphology effects on both Ni–Ag deposition quality and electrocatalytic performances toward Glu oxidation. After being deposited with Ni–Ag NPs, a homogenous surface with very small Ni–Ag NPs was obtained for Ni–Ag/SWCNTs/GCE, while heterogeneous, coarse surfaces with obvious embedment with large Ni–Ag particles were observed for both Ni–Ag/MWCNTs/GCE and Ni–Ag/MPC/GCE. All three modified electrodes were well characterized in terms of surface morphology, electron transfer rate, hydrophilicity, interference resistance, stability, electrocatalytic behaviors as well as practicability in real samples, based on which Ni–Ag/SWCNTs/GCE was always proved to be more advantageous over other two composite electrodes. Such advantage of Ni–Ag/SWCNTs/GCE was attributed to its desirable surface morphology good for Ni–Ag deposition and exposure of as many active sites as possible to Glu oxidation, leading to the extraordinary electrocatalytic performance.

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Electrochemical determination of thiols at single-wall carbon nanotubes and PQQ modified electrodes

Frontiers in Bioscience ◽

10.2741/1587 ◽

2005 ◽

Vol 10 (1-3) ◽

pp. 931 ◽

Cited By ~ 22

Author(s):

Heyou, Han

Keyword(s):

Carbon Nanotubes ◽

Modified Electrodes ◽

Electrochemical Determination ◽

Single Wall Carbon Nanotubes ◽

Single Wall Carbon

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TEMPERATURE DEPENDENCE OF ELECTRICAL RESISTANCE OF INDIVIDUAL CARBON NANOTUBES AND CARBON NANOTUBES NETWORK

Modern Physics Letters B ◽

10.1142/s0217984912501369 ◽

2012 ◽

Vol 26 (21) ◽

pp. 1250136 ◽

Cited By ~ 18

Author(s):

SAJJAD DEHGHANI ◽

MOHAMMAD KAZEM MORAVVEJ-FARSHI ◽

MOHAMMAD HOSSEIN SHEIKHI

Keyword(s):

Carbon Nanotubes ◽

Temperature Dependence ◽

Electric Fields ◽

Electrical Resistance ◽

Electrode Materials ◽

Effect Of Temperature ◽

Electrode Spacing ◽

Single Wall Carbon Nanotubes ◽

Tube Metal

We present a model to understand the effect of temperature on the electrical resistance of individual semiconducting single wall carbon nanotubes (s-SWCNTs) of various diameters under various electric fields. The temperature dependence of the resistance of s-SWCNTs and metallic SWCNTs (m-SWCNTs) are compared. These results help us to understand the temperature dependence of the resistance of SWCNTs network. We experimentally examine the temperature dependence of the resistance of random networks of SWCNTs, prepared by dispersing CNTs in ethanol and drop-casting the solution on prefabricated metallic electrodes. Examining various samples with different electrode materials and spacings, we find that the dominant resistance in determination of the temperature dependence of resistance of the network is the resistance of individual tubes, rather than the tube–tube resistance or tube–metal contact resistance. It is also found that the tube–tube resistance depends on the electrode spacing and it is more important for larger electrode spacings. By applying high electric field to burn the all-metallic paths of the SWCNTs network, the temperature dependence of the resistance of s-SWCNTs is also examined. We also investigate the effect of acid treatment of CNTs on the temperature dependence of the resistance of SWCNTs and also multi-wall CNTs (MWCNTs) networks.

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Fabrication and mechanical properties of single-wall carbon nanotubes and hyperbranched diazonium salt multilayers

Frontiers of Chemical Engineering in China ◽

10.1007/s11705-008-0058-4 ◽

2008 ◽

Vol 2 (3) ◽

pp. 286-290

Author(s):

Xinyang Li ◽

Pengwei Fan ◽

Xinlin Tuo ◽

Xiaogong Wang

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Diazonium Salt ◽

Single Wall Carbon Nanotubes ◽

Single Wall Carbon

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Electrochemical investigation of NO at single-wall carbon nanotubes modified electrodes

Journal of Chemical Sciences ◽

10.1007/s12039-010-0045-4 ◽

2010 ◽

Vol 122 (3) ◽

pp. 401-408 ◽

Cited By ~ 2

Author(s):

Tingliang Xia ◽

Hongmei Bi ◽

Keying Shi

Keyword(s):

Carbon Nanotubes ◽

Modified Electrodes ◽

Single Wall Carbon Nanotubes ◽

Electrochemical Investigation ◽

Single Wall Carbon

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Reactive Insertion of PEDOT-PSS in SWCNT@Silica Composites and its Electrochemical Performance

Materials ◽

10.3390/ma13051200 ◽

2020 ◽

Vol 13 (5) ◽

pp. 1200 ◽

Cited By ~ 3

Author(s):

Halima Djelad ◽

Abdelghani Benyoucef ◽

Emilia Morallón ◽

Francisco Montilla

Keyword(s):

Electrochemical Performance ◽

Rate Constant ◽

Electrochemical Polymerization ◽

Sol Gel ◽

Modified Electrodes ◽

Silica Matrix ◽

Single Wall Carbon Nanotubes ◽

Composite Electrodes ◽

Redox Probe ◽

Electroassisted Deposition

Hybrid silica-modified materials were synthesized on glassy carbon (GC) electrodes by electroassisted deposition of sol-gel precursors. Single-wall carbon nanotubes (SWCNTs) were dispersed in a silica matrix (SWCNT@SiO2) to enhance the electrochemical performance of an inorganic matrix. The electrochemical behavior of the composite electrodes was tested against the ferrocene redox probe. The SWCNT@SiO2 presents an improvement in the electrochemical performance towards ferrocene. The heterogeneous rate constant of the SWCNT@SiO2 can be enhanced by the insertion of poly(3,4-Ethylendioxythiophene)-poly(sodium 4-styrenesulfonate) PEDOT-PSS within the silica matrix, and this composite was synthesized successfully by reactive electrochemical polymerization of the precursor EDOT in aqueous solution. The SWCNT@SiO2-PEDOT-PSS composite electrodes showed a heterogeneous rate constant more than three times higher than the electrode without conducting polymer. Similarly, the electroactive area was also enhanced to more than twice the area of SWCNT@SiO2-modified electrodes. The morphology of the sample films was analyzed by scanning electron microscopy (SEM).

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Graphene/Reduced Graphene Oxide-Carbon Nanotubes Composite Electrodes: From Capacitive to Battery-Type Behaviour

Nanomaterials ◽

10.3390/nano11051240 ◽

2021 ◽

Vol 11 (5) ◽

pp. 1240

Author(s):

Olena Okhay ◽

Alexander Tkach

Keyword(s):

Carbon Nanotubes ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Electrode Materials ◽

Electrical Energy ◽

Portable Devices ◽

Composite Electrodes ◽

Mechanical Pressure ◽

Reduced Graphene ◽

Wide Range

Thanks to the advanced technologies for energy generation such as solar cells and thermo- or piezo-generators the amount of electricity transformed from light, heat or mechanical pressure sources can be significantly enhanced. However, there is still a demand for effective storage devices to conserve electrical energy which addresses the wide range of large stationary applications from electric vehicles to small portable devices. Among the large variety of energy-storage systems available today, electrochemical energy sources and, in particular, supercapacitors (SC), are rather promising in terms of cost, scaling, power management, life cycle and safety. Therefore, this review surveys recent achievements in the development of SC based on composites of such carbon-derived materials as graphene (G) and reduced graphene oxide (rGO) with carbon nanotubes (CNT). Various factors influencing the specific capacitance are discussed, while specific energy and power as well as cycling stability of SC with G/rGO-CNT composite electrode materials are overviewed.

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