Radiation induced reduction: an effective and clean route to synthesize functionalized graphene

Zhang, Bowu; Li, Linfan; Wang, Ziqiang; Xie, Siyuan; Zhang, Yujie; Shen, Yue; Yu, Miao; Deng, Bo; Huang, Qing; Chen, Fan; Li, Jingye

doi:10.1039/c2jm16722k

Cited by 172 publications

(80 citation statements)

References 71 publications

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“…Survey scan results of the GO showed two strong peak at 280 eV and 532 eV, which correspond to C1s and O1s peaks ( Figure 5[a]). Functionalisation of long alkylamine on the GO surface resulted in a significant increase in peak intensity of the C1s peak (280 eV) with extremely attenuated in O1s peak (532 eV) which also be found by Zhang et al 32 Functionalisation also corroborated by the decrease in the O/C ratio from 2.34 (GO) to 0.30 (GO-A18) as showed in Table 2. Successful of functionalisation is further revealed by the appearance of a new peak at 400 eV (N1s) ( Figure 5[a]), which is further confirmed from the rise in the N/O ratio ( Table 1).…”

Section: X-ray Photoelectron Spectroscopysupporting

confidence: 62%

Untitled

2017

JES

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Section: X-ray Photoelectron Spectroscopysupporting

confidence: 62%

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2017

JES

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“…In addition, γ-irradiation with an absorbed dose of 100 kGy improved graphitization and surface properties of multiwalled carbon nanotubes while at higher absorbed dose (150 kGy), it resulted in damaged structures. 27 Zhang et al 28,29 have reported for the first time the synthesis of graphene using a dose rate of 0.88 kGy h −1 and a total absorbed dose of 35.3 kGy. In addition, the effect of γ-irradiation at a higher dose rate of 3 kGy h −1 and absorbed dose of 60-150 kGy on graphene with few layers have been investigated recently.…”

Section: Introductionmentioning

confidence: 99%

“…The results of γ-irradiation reaction strongly depend on irradiation conditions, the material type and irradiation medium. [26][27][28][29] The dose rate has significant effect on the above-mentioned features of the product. 30 It has been reported that the interaction between the γ-radiations and the multi-walled carbon nanotubes with the absorbed dose of 150 kGy destroyed the nanostructure of carbons, leading to the formation of diamond-like structures and carbon oxides.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of graphene using gamma radiations

Shahriary

Athawale

2015

Bull Mater Sci

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Considering the advantages of radiolytic synthesis such as the absence of toxic chemical as a reducing agent, uniform distribution of reducing agent and high purity of product, the synthesis of graphene (rGO) from graphene oxide (GO) by the gamma irradiation technique using a relatively low dose rate of 0.24 kGy h −1 has been described. Structural and physicochemical properties of GO and rGO were investigated with the help of various characterization techniques. The presence of peak at 271 nm in ultraviolet-visible spectrum, C= C aromatic stretching vibrations between 1450 and 1600 cm −1 in the Fourier transform infrared spectrum and significant decrease in photoluminescence peak intensity at 470 and 567 nm wavelengths represent the reduction of GO to graphene by gamma irradiation. The decrease in stacking height from 7.71 nm in GO to 3.52 nm in rGO as observed from the X-ray powder diffraction analysis further confirms the same. Raman spectra show significantly lower D to G band ratio for rGO compared with GO. Also, the cyclic voltammograms obtained using GO-and rGO-modified electrodes (working electrode) in standard redox system show enhanced peak intensities together with decrease in potential difference between oxidation and reduction peaks in case of graphene.

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“…Recent researches focus on developing a facile and green reduction method that is suitable for various substrates. Radiation reduction of GO is deemed as the simpler, purer, and less harmful method that may overcome the shortcomings of other conventional reduction methods [14]. In practical applications, graphene nanosheets usually suffer from agglomeration or restacking giving rise to a great technical difficulty in the fabrication of graphene-based devices.…”

Section: Introductionmentioning

confidence: 99%

Facile and Novel in-Plane Structured Graphene/TiO₂ Nanocomposites for Memory Applications

Shehata

Maksoud

Balboul

2018

Advances in Condensed Matter Physics

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Here, we report a simple strategy for the preparation of graphene/TiO 2 nanocomposite by UV-assisted incorporation of TiO 2 nanosol in graphene oxide (GO) dispersion. The proposed method is facile and of low cost without using any photocatalysts or reducing agents; this can open up a new possibility for green preparation of stable graphene dispersions in large-scale production. X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy, and transmission electron microscopy (TEM) have been used to characterize carefully the as-prepared composites and to confirm the successful preparation of the nanocomposites. The average crystallite size of TiO 2 nanoparticles calculated from XRD pattern using Rietveld analysis is ∼35 nm. TEM measurements show the adsorption of TiO 2 onto graphene (G) sheets, which prevents the restacking of graphene sheets. Current-voltage and capacitance-voltage measurements were used to investigate the electrical resistive memory properties of GO, GO/TiO 2 , and G/TiO 2 thin films. Observed results show hysteresis behavior due to the charge trapping and detrapping process, indicating that the prepared thin films exhibit an excellent resistance switching memory characteristic for G/TiO 2 device.

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Radiation induced reduction: an effective and clean route to synthesize functionalized graphene

Cited by 172 publications

References 71 publications

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Synthesis of graphene using gamma radiations

Facile and Novel in-Plane Structured Graphene/TiO₂ Nanocomposites for Memory Applications

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Radiation induced reduction: an effective and clean route to synthesize functionalized graphene

Cited by 172 publications

References 71 publications

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Synthesis of graphene using gamma radiations

Facile and Novel in-Plane Structured Graphene/TiO2 Nanocomposites for Memory Applications

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Facile and Novel in-Plane Structured Graphene/TiO₂ Nanocomposites for Memory Applications