Preparation of fluoro-functionalized graphene oxide via the Hunsdiecker reaction

Xing, Ruiguang; Li, Yanan; Yu, Hang

doi:10.1039/c5cc08252h

Cited by 51 publications

(39 citation statements)

References 27 publications

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“…Different from graphene, which is almost not soluble and cannot be dispersed in water or any organic solvent34, graphene oxide (GO) contains high-density oxygen functional groups, like hydroxyl and epoxy group on its basal plane, and carboxyl at its edge45. They afford GO with excellent water solubility, ease of functionalization and convenience in processing etc 68,. making it the most popular precursor of graphene.…”

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confidence: 99%

High-efficient Synthesis of Graphene Oxide Based on Improved Hummers Method

Zhang

Bulin

et al. 2016

Sci Rep

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As an important precursor and derivate of graphene, graphene oxide (GO) has received wide attention in recent years. However, the synthesis of GO in an economical and efficient way remains a great challenge. Here we reported an improved NaNO3-free Hummers method by partly replacing KMnO4 with K2FeO4 and controlling the amount of concentrated sulfuric acid. As compared to the existing NaNO3-free Hummers methods, this improved routine greatly reduces the reactant consumption while keeps a high yield. The obtained GO was characterized by various techniques, and its derived graphene aerogel was demonstrated as high-performance supercapacitor electrodes. This improved synthesis shows good prospects for scalable production and applications of GO and its derivatives.

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confidence: 99%

High-efficient Synthesis of Graphene Oxide Based on Improved Hummers Method

Zhang

Bulin

et al. 2016

Sci Rep

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600

282

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“…For example, Chambers et al investigated the transformation of C—H directly to the C—F bond using F‐TEDA . Xing et al synthesized fluoro‐functionalized graphene using F‐TEDA as a fluorinating agent with AgNO 3 as a catalyst . F‐TEDA is also used as an additive in electrolytes for improvement in the electrochemical performance of energy storage devices .…”

Section: Introductionmentioning

confidence: 99%

“…[22] The literature is bound with numerous methods adopted for the fluorination of carbon materials such as direct fluorination using F 2 ; plasma treatment using SF 6 ; photochemical fluorination using cyclic transparent optical polymer (CYTOP), XeF 2 and C 4 F 8 ; hydrothermal, sonochemical, and electrochemical fluorination using fluorine-containing salts and precursors such as HF, BrF 3 , NH 4 F, and NH 4 BF 4 ; and thermal exfoliation of fluorinated graphite. [11,19,[23][24][25][26][27][28][29][30][31][32][33] A brief literature survey on the methods of fluorination is given in Table S1, Supporting Information. These methods suffer a drawback from being corrosive, hazardous, and costly synthetic processes that require special handling procedures.…”

Section: Introductionmentioning

confidence: 99%

“…[35] Xing et al synthesized fluorofunctionalized graphene using F-TEDA as a fluorinating agent with AgNO 3 as a catalyst. [25] F-TEDA is also used as an additive in electrolytes for improvement in the electrochemical performance of energy storage devices. [36] Furthermore, fluorination of Fe 2 O 3 nanostructures using F-TEDA is demonstrated to result in enhanced magnetic [37] and photoelectrochemical properties.…”

Section: Introductionmentioning

confidence: 99%

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Electrophilic Fluorination of Graphitic Carbon for Enhancement in Electric Double‐Layer Capacitance

et al. 2019

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Graphitic carbon is the ultimate source of carbon electrodes for practical application in energy storage devices as it is commercially available at a much lower cost in contrast to other forms of nanostructured carbon. Recently, fluorinated carbon with improved electrical conductivity and wettability has been found to possess better and efficient electrochemical storage properties. However, the development of a simple fluorination process is still a challenge. Herein, Selectfluor (F‐TEDA) is explored as a fluorinating agent for Vulcan carbon. Fluorination of carbon material results in the formation of semi‐ionic C—F (F = 8.02 at%) and ionic C—F (F = 2.71 at%) bonds as observed in X‐ray photoelectron spectroscopy analysis along with an increase in defect density (ID/IG) by 33.4%. Symmetric two‐electrode supercapacitor cells are assembled in Swagelok‐type geometry, and the specific capacitance of fluorinated carbon is found to increase by ≈15 times in contrast to pristine carbon due to induced surface polarization despite the decrease in specific surface area by ≈34%, which is remarkable. The fabricated device is stable with ≈96% capacitance retention over 10 000 cycles, resulting in enhanced supercapacitive performance.

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“…Herein, we have reported application of electrophilic fluorine precursor, Selectfluor TM (F‐TEDA) as an electrolyte component in supercapacitors. F‐TEDA is a well‐known source of electrophilic fluorine in organic reactions . F‐TEDA does not require any special handling conditions and is highly stable bench‐top reagent unlike the conventional toxic and explosive sources of fluorine.…”

Section: Introductionmentioning

confidence: 99%

An Organo‐Fluorine Compound Mixed Electrolyte for Ultrafast Electric Double Layer Supercapacitors

et al. 2018

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Fluorine chemistry has gained tremendous attention in the area of electrochemical energy devices such as lithium ion batteries, fuel cells and solar cells. With the advent of novel fluorinating systems, it is interesting to study the effect of fluorine on the electrochemical characteristics of such energy devices. In this study, an organo‐fluorine compound, SelectfluorTM (F‐TEDA) is used as a co‐electrolyte with organic electrolyte, tetrabutyl ammonium tetrafluoroborate (TBABF4) to facilitate the formation of electrostatic double layer. F‐TEDA is a commercially available N−F fluorinating agent existing as ion‐pair resembling conventional electrolytes. The ionic conductivity of 0.5 M F‐TEDA/TBABF4 is found to be 5.10 mS/cm that increases on introduction of ppm level of water indicating its sensitivity towards water. Symmetric Swagelok‐type cells in two electrode geometry are fabricated using carbon cloth as electrodes and F‐TEDA/TBABF4 as electrolyte. F‐TEDA/TBABF4 in inert condition (Device C) exhibits superior supercapacitive behaviour in terms of high rate capability and capacitance retention. The devices are assembled in ambient and inert conditions to examine the influence of moisture on supercapacitor performance. Interestingly, device based on F‐TEDA assembled in ambient condition despite of decrease in voltage window exhibits a remarkable increase in specific capacitance by 102 % with respect to control electrolyte.

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Preparation of fluoro-functionalized graphene oxide via the Hunsdiecker reaction

Cited by 51 publications

References 27 publications

High-efficient Synthesis of Graphene Oxide Based on Improved Hummers Method

High-efficient Synthesis of Graphene Oxide Based on Improved Hummers Method

Electrophilic Fluorination of Graphitic Carbon for Enhancement in Electric Double‐Layer Capacitance

An Organo‐Fluorine Compound Mixed Electrolyte for Ultrafast Electric Double Layer Supercapacitors

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