A facile preparation of edge etching, porous and highly reactive graphene nanosheets via ozone treatment at a moderate temperature

Xu, Zhiwei; Yue, Mengyao; Chen, Lei; Zhou, Baoming; Shan, Mingjing; Niu, Jiarong; Li, Baodong; Qian, Xiaoming

doi:10.1016/j.cej.2013.11.045

Cited by 31 publications

(10 citation statements)

References 41 publications

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“…The peak at ∼285.2 would correspond to CC/CC in aromatic rings while peak at ∼289.7 eV could be due to an additional carboxylate group. The above findings are in conformity with those reported by Xu et al who reported a comprehensive study on the modification of graphene nanosheets via ozone treatment with moderate temperature. The C1s core level spectra for GO/PVDF composite films indicated (Fig.…”

Section: Resultssupporting

confidence: 93%

Enhanced piezo‐electric property induced in graphene oxide/polyvinylidene fluoride composite flexible thin films

et al. 2017

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Graphene oxide/PVDF composite free‐standing flexible films were prepared with different amount of GO fillers in PVDF matrix using sol‐gel technique. The films were characterized by Field emission scanning electron microscopy, X‐ray diffraction, Fourier transform infrared spectroscopy (FTIR), X‐ray photoelectron spectroscopy (XPS) and Raman studies. Results FTIR, XPS, and Raman were critically analysed for modulation of bonding ambience. The GO/PVDF composite films indicated films to be sp2 rich. Departure from centro‐symmetry of GO when embedded in PVDF matrix leading towards efficient nanogenerator application is discussed critically in the light of Raman and XPS studies. High output voltage was recorded for the unpoled film while the poled samples indicated very negligible output. A rectifying circuit was used to charge a capacitor which was discharged for supplying energy to trigger a red light emitting diode. A maximum a.c. output voltage of ±28V was recorded at microwatt power level. Increments in output voltages with increased GO loading in the PVDF matrix were observed. POLYM. COMPOS., 39:4205–4216, 2018. © 2017 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 93%

Enhanced piezo‐electric property induced in graphene oxide/polyvinylidene fluoride composite flexible thin films

et al. 2017

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“…131 useful tool for background subtraction, curve tting, and peak separation. 119,203 The high resolution C1s signal of GO and RGO represents ve different elemental peaks: 7b and c; although the accurate position of these peaks as well as their exact binding energy (BE) is difficult to specify. 202,[204][205][206] On the other hand, the O1s spectrum of GO displays several individual component peaks which represent C]O groups z (BE ¼ 531.20 eV), C-O groups z (BE ¼ 533 eV), O-C]O groups z (BE ¼ 534.4-535.6 eV), respectively, as seen in Fig.…”

Section: X-ray Photoelectron Spectroscopy Characterisationmentioning

confidence: 99%

“…It is established that the increment of reduction time is proportional to the removal of oxygen groups from the plane of graphene. 113,123,203…”

Section: X-ray Photoelectron Spectroscopy Characterisationmentioning

confidence: 99%

The green reduction of graphene oxide

et al. 2016

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“…Nevertheless, their structural robustness against highly oxidizing environments has been less evaluated in the past. As a powerful oxidant, ozone-based treatments have been extensively utilized to modify the surface properties of carbon materials by oxidative etching. − However, the surface oxygen functionalities and defective sites on nanocarbons are prone to be attacked by O 3 and the produced ROS, resulting in the change of surface chemistry and even the destruction of carbon skeletons into smaller fragments. It was reported that the ozonation system resulted in the release of soluble automatic debris from the carbocatalysts into the solution for increased total organic carbon (TOC). , The soluble organics from carbocatalysts exhibit high recalcitrance toward ROS, which may exacerbate the water quality.…”

Section: Chemical Stability and Regeneration Of Nanocarbonsmentioning

confidence: 99%

Nanocarbon-Based Catalytic Ozonation for Aqueous Oxidation: Engineering Defects for Active Sites and Tunable Reaction Pathways

et al. 2020

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Catalytic ozonation relies on the direct oxidation by ozone (O3) and indirect oxidation by reactive oxygen species (ROS) produced from activated ozone molecules, and the technique has been recognized as one of the most promising remediation technologies in water decontamination. Functional nanocarbon materials have been extensively exploited as heterogeneous catalysts to drive catalytic ozonation because of the environmental-benign process, easy applicability, and high efficiency. Nevertheless, the bottlenecks in the processes are the economical production of high-performance and robust carbocatalysts and the debatable oxidation regimes. Different active sites have been suggested in engineered nanocarbons, and the corresponding mechanisms of the carbocatalytic ozonation are ambiguous including the evolution of various ROS, occurrence of radical and nonradical reaction pathways, selectivity toward organics, and tunable oxidation capacity. In this Review, we will showcase the roadmap of the development of reaction-oriented carbocatalysts and clarify the arguments in the mechanisms of the intrinsic active sites, identification of ROS, reaction intermediates, and oxidation pathways in carbocatalytic ozonation. We will provide critical comments and innovative strategies on the mechanistic investigations in carbon-based ozonation from the molecular level (electronic structures) to macroscale (kinetics), by deliberate radical screening/capture techniques, advanced characterizations and in situ analysis, and theoretical computations. More importantly, the critical issues and future directions will be proposed in the rational material/system design, mechanistic exploration, and the implementation of this powerful technology in catalytic oxidation and real wastewater treatment.

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A facile preparation of edge etching, porous and highly reactive graphene nanosheets via ozone treatment at a moderate temperature

Cited by 31 publications

References 41 publications

Enhanced piezo‐electric property induced in graphene oxide/polyvinylidene fluoride composite flexible thin films

Enhanced piezo‐electric property induced in graphene oxide/polyvinylidene fluoride composite flexible thin films

The green reduction of graphene oxide

Nanocarbon-Based Catalytic Ozonation for Aqueous Oxidation: Engineering Defects for Active Sites and Tunable Reaction Pathways

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