Self‐Assembled Functionalized Graphene Nanoribbons from Carbon Nanotubes

Cunha, Eunice; Proença, M. Fernanda; Costa, F.M.; Fernandes, A.J.S.; Ferro, Marta C.; Lopes, Paulo E.; González-Debs, Mariam; Melle‐Franco, Manuel; Deepak, Francis Leonard; Paiva, Maria C.

doi:10.1002/open.201402135

Cited by 6 publications

(5 citation statements)

References 19 publications

(30 reference statements)

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“…Scheme 1 shows the synthesis process of GNR-MnO 2 nanocomposite for the electrochemical reduction of NFT. UV-vis spectrum of as-prepared GNR was recorded which showed a strong absorbance band at 250 nm due to the partially oxidized GNRs (Figure 1(a)) [37]. On the other hand, the prepared MnO 2 showed the two transition peaks at 284 and 380 nm which were related to the d-d metal transition of MnO 2 nanoparticles (Figure 1(b)) [38].…”

Section: Resultsmentioning

confidence: 99%

Graphene Nanoribbons/Manganese Oxide Nanocomposite Modified Electrode for Detection of Antimicrobial Drug Nitrofurantoin

Nagarajan¹,

Magesh

Sundramoorthy

et al. 2023

Journal of Nanomaterials

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The design and development of a new kind of cost-effective electrode material with excellent selectivity and stability are still a great challenge in the field of electrochemical sensors. Recently, researchers have paid more attention to the electrochemical reduction of nitro compounds due to their hazardous nature. Nitro compounds play a vital role in various industrial applications. However, the direct discharge of nitro compounds to the environment as industrial wastewater is harmful. In this study, a nanocomposite made of 1D graphene nanoribbons decorated with manganese dioxide (GNR-MnO2) was prepared to fabricate an electrochemical transducer for the determination of nitrofurantoin (NFT) in biofluids. First, 1D GNR was prepared by unzipping of multiwalled carbon nanotubes. Second, the GNR was decorated with MnO2 by the hydrothermal reduction method. As-prepared GNR-MnO2 nanocomposite was comprehensively characterized by field emission scanning electron microscopy with EDX, XRD, UV–visible, electrochemical impedance spectroscopy, and cyclic voltammetry. Moreover, GNR-MnO2-coated glassy carbon electrode (GCE) exhibited good electrocatalytic activity toward NFT. The electroreduction of NFT was found at −0.40 V which was 50 mV lower than bare GCE. GNR-MnO2 nanocomposite modified GCE showed a well-defined linear reduction peak current for NFT from 10 nM to 1,000 µM. The selectivity of the sensor was also analyzed in the presence of other nitro compounds which confirmed that NFT can be selectively detected at −0.4 V. The GNR-MnO2 modified electrode was also able to separate reduction peaks of other nitro compounds. In addition, the detection of NFT was carried out in human urine samples with a good recovery of 99.60%–98.60%.

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Section: Resultsmentioning

confidence: 99%

Graphene Nanoribbons/Manganese Oxide Nanocomposite Modified Electrode for Detection of Antimicrobial Drug Nitrofurantoin

Nagarajan¹,

Magesh

Sundramoorthy

et al. 2023

Journal of Nanomaterials

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“…In addition, a better understanding of the modification induced in the electronic properties of the samples following the tip sonication treatment is necessary. The changes observed in the optical absorption profiles of the sonicated materials compared to the pristine EXG 3000 sample provide the first insights into existing variations in the plasmonic (and consequently electronic) response [22], but other means have to be identified to better describe them, such as electrochemistry, conductive atomic force microscopy or charge transport measurements. The thus-produced and characterized graphene inks could be of interest for multiple applications where the size of the flakes and their defect identities are relevant, from solution-processed thin layers and devices to composites.…”

Section: Discussionmentioning

confidence: 99%

Controlled Size Reduction of Liquid Exfoliated Graphene Micro-Sheets via Tip Sonication

et al. 2020

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Liquid exfoliation of three-dimensional bulk solids with an inherent layered structure is an effective and scalable method to produce stable re-aggregation colloidal inks of 2D materials that are suitable for solution processing. Shear mixing is a relatively gentle technique that allows exfoliation while preserving the native lateral size of the 3D precursors, while tip sonication often leads to extensive structural damage, producing 2D sheets where many edge defects are introduced. We present a mixed approach to obtain liquid dispersions of few-layer graphene flakes, wherein the average lateral size of the colloids can be tuned in a controlled way. This strategy relies on the application of defined tip sonication steps on graphene inks previously prepared through the use of a shear mixer, thus starting with already-exfoliated micro-sheets with a limited amount of edge defects. Our approach could represent a valuable method to prepare 2D material inks with variable size distributions, as differences in this parameter could have a significant impact on the electronic behavior of the final material and thus on its field of application.

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“…3 Zhang et al grew N, Fe, Co-doped CNTs on the skeleton of 3D nitrogen-doped carbon foams to show high electrochemical stability. 69 Similarly, functional CNTs have been incorporated with other components, including polyethyleneimine, 70 metal catalysts, 71,72 vanadium nitride, 73 pyrrole 74 and polythiophene 75 for various energy-related applications. By functionalizing with different functional groups, the CNTs can possess distinctly different properties, which would help to achieve and broaden new applications of the CNTs.…”

Section: Functionalization Of Cnts and Graphene-based Materialsmentioning

confidence: 99%

Functionalized carbon nanotubes and graphene-based materials for energy storage

Wang

Dai

2016

Chem. Commun.

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Carbon nanotubes (CNTs) or graphene-based nanomaterials functionalized by different strategies have attracted great attention for energy storage due to their large specific surface area, high conductivity, and good mechanical properties. This feature article presents an overview of the recent progress in the functionalization of CNTs and graphene-based materials for energy storage applications in supercapacitors and batteries, along with challenges and perspectives in this exciting field.

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Self‐Assembled Functionalized Graphene Nanoribbons from Carbon Nanotubes

Cited by 6 publications

References 19 publications

Graphene Nanoribbons/Manganese Oxide Nanocomposite Modified Electrode for Detection of Antimicrobial Drug Nitrofurantoin

Graphene Nanoribbons/Manganese Oxide Nanocomposite Modified Electrode for Detection of Antimicrobial Drug Nitrofurantoin

Controlled Size Reduction of Liquid Exfoliated Graphene Micro-Sheets via Tip Sonication

Functionalized carbon nanotubes and graphene-based materials for energy storage

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