Hydrazine-reduction of graphite- and graphene oxide

Park, Sunghee; An, Jinho; Potts, Jeffrey R.; Velamakanni, Aruna; Murali, Shanthi; Ruoff, Rodney S.

doi:10.1016/j.carbon.2011.02.071

Cited by 1,476 publications

(799 citation statements)

References 31 publications

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“…By this method, poGr/PEDOT:PSS or po-Gr film-coated electrode was obtained and gently washed by immersing in water for about 5 min to remove unbounded materials from the electrode surface. For Raman measurements, the po-Gr film prepared on glass substrate was reduced with hydrazine in pH 9.0 water solution at 80°C for 2 h (Park et al, 2011).…”

Section: Preparation Of Po-gr/pedot:pss-modified Electrodementioning

confidence: 99%

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

et al. 2014

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Partially oxidized graphene flakes (po-Gr) were obtained from graphite electrode by an electrochemical exfoliation method. As-produced po-Gr flakes were dispersed in water with the assistance of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS). The po-Gr flakes and the po-Gr/PEDOT:PSS nanocomposite (po-Gr/PEDOT:PSS) were characterized by Raman spectroscopy, Fourier transform-infrared spectroscopy (FT-IR), UV-Vis spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). In addition, we demonstrated the potential use of po-Gr/PEDOT:PSS electrode in electrochemical detection of mercury ions (Hg 2+ ) in water samples. The presence of po-Gr sheets in PEDOT:PSS film greatly enhanced the electrochemical response for Hg 2+ . Cyclic voltammetry measurements showed a well-defined Hg 2+ redox peaks with a cathodic peak at 0.23V, and an anodic peak at 0.42V. Using differential pulse stripping voltammetry, detection of Hg 2+ was achieved in the range of 0.2-14 µM (R 2 = 0.991), with a limit of detection of 0.19 µM for Hg 2+ . The electrode performed satisfactorily for sensitive and selective detection of Hg 2+ in real samples, and the po-Gr/PEDOT:PSS film remains stable on the electrode surface for repeated use.Therefore, our method is potentially suitable for routine Hg 2+ sensing in environmental water samples.

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Section: Preparation Of Po-gr/pedot:pss-modified Electrodementioning

confidence: 99%

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

et al. 2014

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“…Graphene (reduced graphene oxide [10]) was acquired from GRAPHENEA (San Sebastián, SPAIN). CHCA was prepared as a saturated solution in 50% acetonitrile, 0.1% TFA, and sinapinic acid as a saturated solution in 30% acetonitrile 0.1% TFA.…”

Section: Graphene Preparationmentioning

confidence: 99%

Conventional Matrices Loaded Onto a Graphene Layer Enhances MALDI-TOF/TOF Signal: Its Application to Improve Detection of Phosphorylated Peptides

Rodríguez

Palacios

Fajardo

et al. 2015

J. Am. Soc. Mass Spectrom.

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Abstract. This is the first study where graphene is used as a MALDI adjuvant in combination with the traditional matrix α-cyano-4-hydroxycinnamic acid (CHCA) to improve the signal intensity of peptide samples. Use of this amended matrix not only leads to increased signals but also to a higher number of peaks detected in complex samples. Additionally, the use of graphene has a stabilizing effect that can also be exploited to improve the detection of easily cleavable molecules.

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“…The reduction process is an essential step, however, many of the reductants used to reduce GO, such as hydrazine (37,38), hydrazine hydrate (39,40), sodium borohydride (NaBH 4 ) (41), metal hydrides (42,43) hydroquinone, amino acids, sodium borohydride and sodium hydroxide are either strongly acidic or highly toxic. Moreover, the by-products of these reductants are not environmentally benign, thus making bulk production of graphene difficult and not suitable for further applications, particularly in the biomedical field.…”

Section: Introductionmentioning

confidence: 99%

Artemisia herba-alba Asso eco-friendly reduced few-layered graphene oxide nanosheets: structural investigations and physical properties

Khenfouch

Ndimba

Diallo

et al. 2016

Green Chemistry Letters and Reviews

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Nowadays graphene is universally known as a promising material. Hence, the development of ecofriendly synthesis methods for this material is of great importance. This study reports on the biosynthesis of graphene by a green chemistry process using Artemisia herba-alba Asso (AHAA) natural extract. Moreover, this work reports on the physical properties, including surface/ interface and optical and electrical properties of the obtained graphene sheets. UV-VIS, Raman, XPS spectroscopies and TEM microscopy investigations confirmed the reduction, and the conversion of graphene oxide to few-layered reduced graphene oxide as well as the efficiency of this plant extract compared with several natural extracts and chemical agents. Furthermore, it was found that the optical and electrical properties of graphene can be modulated and controlled via this eco-friendly cost-effective process. Hence, AHAA can be an effective chelating agent to produce graphene sheets. ARTICLE HISTORY

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Hydrazine-reduction of graphite- and graphene oxide

Cited by 1,476 publications

References 31 publications

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

Highly Selective Mercury Detection at Partially Oxidized Graphene/Poly(3,4-Ethylenedioxythiophene):Poly(Styrenesulfonate) Nanocomposite Film-Modified Electrode

Conventional Matrices Loaded Onto a Graphene Layer Enhances MALDI-TOF/TOF Signal: Its Application to Improve Detection of Phosphorylated Peptides

Artemisia herba-alba Asso eco-friendly reduced few-layered graphene oxide nanosheets: structural investigations and physical properties

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