Thermostability, Photoluminescence, and Electrical Properties of Reduced Graphene Oxide–Carbon Nanotube Hybrid Materials

Liu, Fuchi; Cao, Yong; Yi, Mingdong; Xie, Linghai; Huang, Wei; Tang, Nujiang; Wang, Zhong; Du, Youwei

doi:10.3390/cryst3010028

Cited by 32 publications

(20 citation statements)

References 30 publications

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“…The blue PL band with the peak at 2.80 eV in ZnO is attributed earlier to Cu related defects in [22,23], to Zn interstitials [24] or to the donor-acceptor pairs included the shallow donor and oxygen vacancy [25]. In our case we can attribute the 2.80 eV PL band to emission of the graphene or graphite oxides covered the surface of ZnO NCs [26][27][28].…”

Section: Resultsmentioning

confidence: 75%

Photoluminescence trend in mixture of zinc oxide and carbon nanoparticles after mechanical processing

Lozada

Torchynska

Espínola

et al. 2015

Materials Science in Semiconductor Processing

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Section: Resultsmentioning

confidence: 75%

Photoluminescence trend in mixture of zinc oxide and carbon nanoparticles after mechanical processing

Lozada

Torchynska

Espínola

et al. 2015

Materials Science in Semiconductor Processing

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“…This observation also shows that all ―NH 2 bonds were decomposed after 16 hours wet ball milling with 650 rpm grinding speed. Another observation is the changes of 2 high and sharp peaks at 2854 cm − 1 and 2925 cm − 1 , which correspond to the C―H bonds in alkanes groups, in the BM‐N‐G‐16‐350 and BM‐N‐G‐16‐500 . But only a few of the same C―H groups were found in the N‐G catalyst when the grinding speed increased to 650 rpm.…”

Section: Resultsmentioning

confidence: 96%

Nitrogen-doped graphene catalysts: High energy wet ball milling synthesis and characterizations of functional groups and particle size variation with time and speed

et al. 2017

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Summary Nitrogen‐doped graphene (N‐G) catalyst emerges as one of the promising non‐platinum group metal (non‐PGM) catalysts with the advantages of low cost, high oxygen reduction reaction (ORR) activity, stability, and selectivity to replace expensive PGM catalysts in electrochemical systems. In this research, nanoscale high energy wet (NHEW) ball milling is first investigated for the synthesis of N‐G catalysts to make conventional problems such as sintering or localized overheating issues negligible. The successful synthesis of N‐G catalysts with comparable catalytic performance to 10 wt% Pt/C by using this method has been published. This paper focuses on understanding the effect of grinding speed and grinding time on the particle size and chemical state of N‐G catalysts through the physical and chemical characterization. The research result shows that (1) the final particle size, nitrogen doping percentage, and nitrogen bonding composition of synthesized N‐G catalysts are predictable and controllable by adjusting the grinding time, the grinding speed, and other relative experimental parameters; (2) the final particle size of N‐G catalysts could be estimated from the derived relation between the cracking energy density and the particle size of ground material in the NHEW ball milling process with specified experimental parameters; and (3) the chemical composition of N‐G catalysts synthesized by NHEW ball milling is controllable by adjusting the grinding time and grinding speed.

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“…Crystals 2018, 8,196 5 of 18 Figure 3c shows the compact combination of the aluminum-magnesium alloy and carbon substrate and the surface of pyrolytic carbon uniformly coated with a metallic alloy. The interface of pyrolytic carbon and the metal layer was compacted, and a "network conduction" structure formed in the matrix.…”

Section: Microstructurementioning

confidence: 99%

“…Figure 7b illustrates three kinds of friction curves at a 15 N load and lubricated in dry conditions. The test time was controlled Crystals 2018, 8,196 9 of 18 at 10 min. A time of approximately 4 mins was needed for C/C to stabilize; this period was shorter than the 6 min observed for C/C-Al-Mg. For the steeped metal slider, the friction coefficient changed irregularly, but it measured less than 0.20 in most cases.…”

Section: Mechanical Properties and Fracture Behavior Of Compositesmentioning

confidence: 99%

“…Carbon/carbon (C/C) composites have attracted considerable attention in various applications due to their unique properties, such as low density, high structural stability, excellent wear resistance, and high temperature resistance [1][2][3][4][5][6][7][8]. C/C composites can be applied in special fields, such as contact strips for pantographs, collector shoes in electric railways, and the current high-speed train system.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Al–Mg Alloy Infiltration on Mechanical and Electrical Properties for Carbon/Carbon Composites

2018

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Under vacuum Al-Mg alloy, liquids were successfully infiltrated into carbon/carbon (C/C) composites at high temperatures. Then, the mechanical properties, the metallographics, the scanning electron microscope images, the transmission electron microscope images, the X-ray diffraction images, and the energy dispersive spectroscopy results of C/C-Al-Mg composites were analyzed. The result showed that the bending property of C/C-Al-Mg composites reached 183 MPa whereas that of C/C composites totaled 165 MPa. The compressive strength of C/C-Al-Mg measured 206 MPa whereas that of C/C composites amounted to 142 MPa. The flexural strength and compressive strengths of the steeped metal sliders measured 121 and 104 MPa, respectively. The alloy liquid infiltrated into the matrix by forming a "network conduction" structure which reduced the resistivity and improved the conductivity of the composites. The resistivity of C/C-Al-Mg totaled 1.63 µΩm whereas that of C/C was 3.56 µΩm. During infiltration, an excellent wettability was observed between Al and the carbon matrix due to the existence of Al 4 C 3 . The friction coefficients of C/C, the steeped metal slide, and C/Al-Mg were 0.152, 0.068, and 0.189, respectively. The properties of C/C-Al-Mg composites meet the performance requirements of locomotive pantograph sliders.

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Thermostability, Photoluminescence, and Electrical Properties of Reduced Graphene Oxide–Carbon Nanotube Hybrid Materials

Cited by 32 publications

References 30 publications

Photoluminescence trend in mixture of zinc oxide and carbon nanoparticles after mechanical processing

Photoluminescence trend in mixture of zinc oxide and carbon nanoparticles after mechanical processing

Nitrogen-doped graphene catalysts: High energy wet ball milling synthesis and characterizations of functional groups and particle size variation with time and speed

Effect of Al–Mg Alloy Infiltration on Mechanical and Electrical Properties for Carbon/Carbon Composites

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