Functionalization of graphene sheets through fullerene attachment

Zhang, Yue; Ren, Liqiang; Wang, Shiren; Marathe, Archis; Chaudhuri, J.; Li, Guigen

doi:10.1039/c1jm10257e

Cited by 105 publications

(74 citation statements)

References 65 publications

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“…In the GO spectrum, a strong and broad band at 3410 cm ¡1 , which is due to the O-H stretching vibrations [47,48], and the presence of peaks between 1000 and 1750 cm ¡1 corresponding to a large number of functional groups. The bands at 1743 cm ¡1 [47,49,50] are related to the C=O stretching vibrations, the peak at 1637 cm ¡1 [50,51] is ascribed to C=C stretching vibration, and the bands at 869 [52], 1054 [52], 1230 [53] and 1400 cm ¡1 [54] are attributed to C-O stretching vibrations. No distinct differences are found between the spectrum of GO u4 and GO h4, indicating that the relative functional groups of GO nanosheets are similar and not affected by exfoliation method.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Facile and size-controllable preparation of graphene oxide nanosheets using high shear method and ultrasonic method

Cai

Sang

Shen

et al. 2017

Journal of Experimental Nanoscience

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The lateral size of the graphene oxide (GO) nanosheets could be controlled by preparation method, and a simple and effective strategy to adjust the lateral size of GO nanosheets by selecting suitable method is presented. The high shear method was introduced to produce GO nanosheets, and the GO nanosheets (few micrometres) prepared by high shear method is about one order of magnitude larger than GO nanosheets (few hundred nanometres) obtained by ultrasonic method, as evidenced by atomic force microscopy. The FTIR, XPS and Raman analysis revealed that there are no distinct differences in composition and functional groups between the GO nanosheets produced by high shear method and ultrasonic method. The cavitation in the procedure of ultrasonic method is favourable for GO exfoliation, but it also could result in damage to GO nanosheets. The shearing force in the process of high shear method is effective for GO delamination with minimal fragmentation. The results indicated that the high shear method proposed in this paper is an efficient exfoliation means to produce single-layer GO nanosheets.

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Section: X-ray Diffraction Analysismentioning

confidence: 99%

Facile and size-controllable preparation of graphene oxide nanosheets using high shear method and ultrasonic method

Cai

Sang

Shen

et al. 2017

Journal of Experimental Nanoscience

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“…The formation of CNTs could be attributed to the catalysis of iron particles and the decrease of vacuum degree in quartz tube during the cooling process. The grapheneCNTs system has significant technological advantages due to the combination of individual properties of graphene and CNTs in various applications (Kalita et al 2008;Rodríguez-Manzo et al 2009;Lee et al 2010;Zhang et al 2011).…”

Section: Fe-sem Analysismentioning

confidence: 99%

Preparation and Characterization of Biobased Graphene from Kraft Lignin

2017

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Graphene was manufactured from commercial kraft lignin, and its forming mechanism, structure, and properties were investigated. A single factor test was employed to determine the optimum conditions of the production of graphene nanosheets. Kraft lignin was mixed with iron powders as catalyst with different weight ratios. The mixed carbon source and catalyst were thermally treated at 1000 °C and incubated for a period of time in a tubular furnace. The thermally treated carbon materials were analyzed by field emission scanning electron microscopy (FE-SEM), Raman spectroscopy, atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The preferable conditions for production of graphene nanosheets from kraft lignin were determined. The graphene fold structure was obtained after thermally treating for 90 min when the ratio of carbon source to iron was 3:1. The results revealed that folded lamellar graphene structure increased with greater holding time. Carbon nanotubes (CNTs) were observed after thermal treatment for 105 min. These results indicate the formation of graphite crystal structure and multi-layered graphene from kraft lignin in the presence of iron catalyst.

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“…Recently, some bimetallic transition metal nanostructures showed good performances as electrodes in the energy devices [7][8][9][10][11][12]; however, according to our best knowledge, this promised structure has been rarely exploited as a supercapacitor [4]. Recently, carbonaceous materials have been widely utilized as support for functional materials, and distinct enhancement in the specific capacitance was observed [13,14]. Graphene is a fascinating carbon material having marvelous characteristics, so it was incorporated with the most promising electrode materials for electrochemical energy storage [15,16].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-doped, FeNi alloy nanoparticle-decorated graphene as an efficient and stable electrode for electrochemical supercapacitors in acid medium

El‐Deen¹,

El‐Newehy²,

Kim³

et al. 2016

Nano Online

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Nitrogen-doped graphene decorated by iron-nickel alloy is introduced as a promising electrode material for supercapacitors. Compared to pristine and Ni-decorated graphene, in acid media, the introduced electrode revealed excellent specific capacitance as the corresponding specific capacitance was multiplied around ten times with capacity retention maintained at 94.9% for 1,000 cycles. Briefly, iron acetate, nickel acetate, urea, and graphene oxide were ultrasonicated and subjected to MW heating and then sintered with melanin in Ar. The introduced N-doped FeNi@Gr exhibits remarkable electrochemical behavior with long-term stability.

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Functionalization of graphene sheets through fullerene attachment

Cited by 105 publications

References 65 publications

Facile and size-controllable preparation of graphene oxide nanosheets using high shear method and ultrasonic method

Facile and size-controllable preparation of graphene oxide nanosheets using high shear method and ultrasonic method

Preparation and Characterization of Biobased Graphene from Kraft Lignin

Nitrogen-doped, FeNi alloy nanoparticle-decorated graphene as an efficient and stable electrode for electrochemical supercapacitors in acid medium

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