Oxidized/reduced graphene nanoribbons facilitate charge transfer to the Fe(CN)₆³⁻/Fe(CN)₆⁴⁻ redox couple and towards oxygen reduction

Nanoscale
Fábio de Lima, Gilberto Maia

Abstract

This study investigated the synthesis of graphene oxide nanoribbons (GONRs) and graphene nanoribbons (GNRs) from multiwalled carbon nanotubes (MWCNTs), and the behavior of thin films of MWCNTs, GONRs, and GNRs on a glassy carbon surface in the presence of two redox probes (Fe(CN)6(3-)/Fe(CN)6(4-) and O2) employing cyclic voltammetry, electrochemical impedance spectroscopy, and hydrodynamic voltammetry (HV) as a simple procedure for characterizing these films. The feasibility of using these electrochemical techniques for this purpose opens up the possibility of applying them to biosensors and electrocatalysts using surface-supported MWCNT, GONR, and GNR materials. GNR1 resembles an internodal segment of bamboo cut lengthwise, with a shallow troughing at its center, while GNR2 resembles stacked ribbons, each ∼16 nm wide, with points of structural damage and points of four-ribbon connection measuring 60 nm or wider, sufficiently catalytic for the oxygen reduction reaction to occur, unlike the other modified electrodes investigated in acidic, 0.1 M KH2PO4 (pH 7.0), and 0.1 M KOH solutions (HV results). Transmission electron microscopy and thermogravimetric analysis were employed to characterize the MWCNTs, GONRs, and GNRs.

References

May 23, 2006·Physical Review Letters·Je-Luen LiRoberto Car
Jun 17, 2006·Nature·Pulickel M Ajayan, Boris I Yakobson
Mar 3, 2007·Nature·Jannik C MeyerS Roth
Jan 26, 2008·Science·Xiaolin LiHongjie Dai
Apr 11, 2008·Journal of the American Chemical Society·Yuxi XuGaoquan Shi
Jun 19, 2008·Chemical Reviews·Richard L McCreery
Jul 26, 2008·Nature Nanotechnology·Dan LiGordon G Wallace
Apr 4, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·J I ParedesJ M D Tascón
Apr 17, 2009·Nature·Mauricio Terrones
Apr 17, 2009·Nature·Dmitry V KosynkinJames M Tour
Apr 17, 2009·Nature·Liying JiaoHongjie Dai
Jul 25, 2009·The Journal of Chemical Physics·Norma L RangelJorge M Seminario
Mar 6, 2010·ACS Nano·Amanda L HigginbothamJames M Tour
Apr 7, 2010·Nature Nanotechnology·Liying JiaoHongjie Dai
Aug 25, 2010·ACS Nano·Daniela C MarcanoJames M Tour
Sep 25, 2010·Nature Communications·In Kyu MoonHyoyoung Lee
Oct 12, 2010·Science·John R MillerB C Holloway
May 29, 2012·Nature Nanotechnology·Yanguang LiHongjie Dai
Jan 2, 2013·Accounts of Chemical Research·Dustin K James, James M Tour
Feb 21, 2013·ACS Nano·Rodolfo Cruz-SilvaMauricio Terrones

❮ Previous
Next ❯

Citations

Jan 10, 2019·ACS Applied Materials & Interfaces·Jayaraman TheerthagiriGilberto Maia

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.