Electrochemical behavior of electrodes modified with metalloporphyrin and multiwalled carbon nanotubes for the reduction of oxygen, proton and carbon dioxide

Iron porphyrin and cobalt porphyrin were respectively modified on glassy carbon (GC) electrodes together with multiwalled carbon nanotubes (MWCNTs), and the modified electrodes were characterized by X-ray photoelectron spectroscopy (XPS). Their electrochemical performance for the reduction of oxygen (O2) , proton (H+) and carbon dioxide (CO2) were respectively investigated and compared by cyclic voltammetry (CV). The results showed that iron porphyrin-MWCNT modified electrode always had a better performance than cobalt porphyrin-MWCNT modified electrode. It is proposed that iron porphyrin-MWCNT modified electrode will have promising application in electrochemical architectures like microbial fuel cells (MFCs) and microbial electrolysis cells (MECs) for its good biocompatibility, easy availability, as well as excellent electrochemical performance.

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Preparation, Characterization and Application of Research of Novel Poly N,N-Dimethylaniline/Multiwalled Carbon Nanotubes Modified Electrode

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1095.2013.20257 ◽

2013 ◽

Vol 30 (3) ◽

pp. 360

Author(s):

Juanjuan LI ◽

Jiangyuan LI ◽

Zuoquan NIAN

Keyword(s):

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Modified Electrode ◽

Multiwalled Carbon

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Multiwalled Carbon Nanotubes Covered with Cobalt (II) Phthalocyanine by In Situ Synthesis and its Electrochemical Sensing Performance towards DA and UA

Materials Science Forum ◽

10.4028/www.scientific.net/msf.809-810.43 ◽

2014 ◽

Vol 809-810 ◽

pp. 43-52

Author(s):

Hua Hua Wang ◽

Nan Li ◽

Kai Li ◽

Yuan Bu ◽

Wen Le Dai ◽

...

Keyword(s):

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Photoelectron Spectroscopy ◽

Simultaneous Detection ◽

Thick Layer ◽

Electrochemical Sensing ◽

Multiwalled Carbon ◽

X Ray ◽

Platinum Particles

Multiwalled carbon nanotubes (MWCNTs) as an excellent supporter covered with a thick layer of cobalt phthalocyanine (CoPc) were prepared by in-situ synthesis. Platinum particles were adopted to enhance the conductivity of CoPc-MWCNTs. The final nanocomposite Pt-CoPc-MWCNTs was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). Strong aromatic π-π stacking between MWCNTs and CoPc made CoPc in-situ forming on MWCNTs. With homogeneous thickness of CoPc covered on the MWCNTs and Pt particles equally distributed, the nanocomposite was used as electrocatalyst. The electrochemical properties of the composite got researched by casting the dispersion of Pt-CoPc-MWCNTs on the glassy carbon electrode. Compared with other modified electrodes, Pt-CoPc-MWCNTs/GC electrode exhibited excellent electrochemical activity towards dopamine (DA) and uric acid (UA). Linear responses for DA and UA were obtained in the ranges of 5 to 170 μM and 5 to 100 μM, and limits of detection were 2.6 and 1.4 μM (S/N= 3), respectively. Simultaneous detection of DA and UA in the presence of ascorbic acid (AA) also displayed selective property, with no interference to each other.

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Removal of Pb(II) and Cu(II) from aqueous solution using multiwalled carbon nanotubes/iron oxide magnetic composites

Water Science & Technology ◽

10.2166/wst.2011.270 ◽

2011 ◽

Vol 63 (5) ◽

pp. 917-923 ◽

Cited By ~ 46

Author(s):

Jun Hu ◽

Donglin Zhao ◽

Xiangke Wang

Keyword(s):

Carbon Nanotubes ◽

Iron Oxide ◽

Multiwalled Carbon Nanotubes ◽

Sorption Capacity ◽

Photoelectron Spectroscopy ◽

Metal Ion ◽

Precipitation Method ◽

Multiwalled Carbon ◽

Magnetic Composites ◽

X Ray

Multiwalled carbon nanotubes (MWCNTs)/iron oxide magnetic composites (named as MCs) were prepared by co-precipitation method, and were characterised by scanning electron microscope (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) in detail. The prepared MCs were employed as an adsorbent for the removal of Pb(II) and Cu(II) ions from wastewater in heavy metal ion pollution cleanup. The results demonstrated that the sorption of Pb(II) and Cu(II) ions was strongly dependent on pH and temperature. The experimental data were well described by Langmuir model, and the monolayer sorption capacity of MCs was found to vary from 10.02 to 31.25 mg/g for Pb(II) and from 3.11 to 8.92 mg/g for Cu(II) at temperature increasing from 293.15 to 353.15 K at pH 5.50. The sorption capacity of Pb(II) on MCs was higher than that of Cu(II), which was attributed to their ionic radius, hydration energies and hydrolysis of their hydroxides. The thermodynamic parameters (i.e., ΔH0, ΔS0 and ΔG0) were calculated from temperature dependent sorption isotherms, and the results indicated that the sorption of Pb(II) and Cu(II) ions on MCs were spontaneous and endothermic processes.

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CVD Synthesis, Functionalization and CO2 Adsorption Attributes of Multiwalled Carbon Nanotubes

Processes ◽

10.3390/pr7090634 ◽

2019 ◽

Vol 7 (9) ◽

pp. 634 ◽

Cited By ~ 3

Author(s):

Shazia Shukrullah ◽

Muhammad Yasin Naz ◽

Norani M. Mohamed ◽

Khalid A. Ibrahim ◽

Nasser M. AbdEl-Salam ◽

...

Keyword(s):

Carbon Dioxide ◽

Carbon Nanotubes ◽

Adsorption Capacity ◽

Multiwalled Carbon Nanotubes ◽

Functional Groups ◽

Co2 Adsorption ◽

Breakthrough Curves ◽

Multiwalled Carbon ◽

Amine Functionalized ◽

Co2 Adsorption Capacity

Carbon dioxide is one of the major greenhouse gases and a leading source of global warming. Several adsorbent materials are being tested for removal of carbon dioxide (CO2) from the atmosphere. The use of multiwalled carbon nanotubes (MWCNTs) as a CO2 adsorbent material is a relatively new research avenue. In this study, Fe2O3/Al2O3 composite catalyst was used to synthesize MWCNTs by cracking ethylene gas molecules in a fluidized bed chemical vapor deposition (CVD) chamber. These nanotubes were treated with H2SO4/HNO3 solution and functionalized with 3-aminopropyl-triethoxysilane (APTS). Chemical modification of nanotubes removed the endcaps and introduced some functional groups along the sidewalls at defected sites. The functionalization of nanotubes with amine introduced carboxylic groups on the tube surface. These functional groups significantly enhance the surface wettability, hydrophilicity and CO2 adsorption capacity of MWCNTs. The CO2 adsorption capacity of as-grown and amine-functionalized CNTs was computed by generating their breakthrough curves. BELSORP-mini equipment was used to generate CO2 breakthrough curves. The oxidation and functionalization of MWCNTs revealed significant improvement in their adsorption capacity. The highest CO2 adsorption of 129 cm3/g was achieved with amine-functionalized MWCNTs among all the tested samples.

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3,4,9,10-Perylene tetracarboxylic acid-multiwalled carbon nanotubes nanocomposites modified electrode for the simultaneous detection of adenine and guanine

Journal of Electroanalytical Chemistry ◽

10.1016/j.jelechem.2017.09.027 ◽

2017 ◽

Vol 803 ◽

pp. 150-156 ◽

Cited By ~ 7

Author(s):

Zhipan Guo ◽

Lin Li ◽

Xinhe Liu ◽

Guofan Wu ◽

Xiaoquan Lu ◽

...

Keyword(s):

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Modified Electrode ◽

Simultaneous Detection ◽

Tetracarboxylic Acid ◽

Multiwalled Carbon

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Capture of Carbon Dioxide by Modified Multiwalled Carbon Nanotubes

Environanotechnology ◽

10.1016/b978-0-08-054820-3.00004-6 ◽

2010 ◽

pp. 55-69 ◽

Cited By ~ 1

Author(s):

Chungsying Lu ◽

Bilen Wu ◽

Wenfa Chen ◽

Yu-Kuan Lin ◽

Hsunling Bai

Keyword(s):

Carbon Dioxide ◽

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Multiwalled Carbon

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Synthesis and Performance of Dopa-Modified Multiwalled Carbon Nanotubes

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.184-185.1289 ◽

2012 ◽

Vol 184-185 ◽

pp. 1289-1293

Author(s):

Lu Zhi Wang ◽

Lin Yu ◽

Xiao Ling Cheng ◽

Jun He ◽

Le Jia Lin ◽

...

Keyword(s):

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Photoelectron Spectroscopy ◽

Multiwalled Carbon ◽

X Ray ◽

Multiwalled Nanotubes ◽

Mixed Acid ◽

Transmission Electron ◽

Ft Ir ◽

And Performance

The Dopamine-modified multiwalled carbon nanotubes (MWNT-Dopa) were synthesized by chemical reaction between dopamine (Dopa) and multiwalled carbon nanotubes which oxidazed by mixed-acid (MWNT-COOH). The structure of MWNT-Dopa were analyzed by Fourier transform infrared spectroscopy (FT-IR), Thermogravimetric (TG), Transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) techniques and the dispersity of MWNT-Dopa were studied by Dispersion stability analyzer. The results show that dopamine has been grafted on multiwalled carbon nanotubes successfully, and a dopamine layer which wraps on the surface of multiwalled nanotubes make multiwalled nanotubes have outstanding dispersity in water.

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