Superhigh-exfoliation graphene with a unique two-dimensional (2D) microstructure for lubrication application

Zhao, Jun; Huang, Yiyao; Li, Yingru; Gao, Tong; Dou, Zhan; Mao, Junyuan; Wang, Hongdong; He, Yongyong; Li, Shuangxi; Luo, Jianbin

doi:10.1016/j.apsusc.2020.145608

Cited by 37 publications

(11 citation statements)

References 32 publications

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“…And classifying materials from structural properties, 2D materials also could be divided into layered materials with intrinsic van der Waals interaction and nonlayered materials with covalent bonding. These materials with unique structure, [ 31 ] environmental stability, [ 32 ] and excellent optoelectronic properties enable them to become an integral component in electronic and optoelectronic devices. Until now, a number of 2D materials have been systematically studied from fabrication process to practical application.…”

Section: Photodetectors Based On Single 2d Materialsmentioning

confidence: 99%

Recent Advances in 2D Materials for Photodetectors

Jiang

Wen

Wang

et al. 2021

Adv Elect Materials

125

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Photodetection technology has been systematically studied due to wide practical applications in temperature monitoring, thermal image technology, and light communication systems. To date, photodetectors based on multitudes of 2D materials have been reported because of their excellent performance. On account of their novel physical properties with ultrathin thickness, cost‐effective preparation with mechanical transfer process, natural passivated surface without dangling bonds, various bandgaps corresponding with a wide photoresponse, and so on, new 2D materials emerge to play significant roles in the field of photodetection. In this regard, a great advance has been achieved in terms of preparation and device application, especially in the last decade. However, there are still some challenges to obtain high‐performance photodetectors, such as growing high‐quality 2D materials, achieving higher quantum efficiency, effectively separating the photogenerated electron–hole pairs, and so on. In this review, the recent development of the state‐of‐the‐art photodetection composed of 2D materials is summarized. Moreover, the key parameters and mechanisms in photodetectors are highlighted, and an overview on 2D materials and their heterostructures is provided. Finally, the strategies for improving the performance of photodetectors are also highlighted. The review will provide a guide to further practical applications in photodetection devices.

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Section: Photodetectors Based On Single 2d Materialsmentioning

confidence: 99%

Recent Advances in 2D Materials for Photodetectors

Jiang

Wen

Wang

et al. 2021

Adv Elect Materials

125

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“…The higher SSA value of heRGO (829.5 m 2 /g) than that of tRGO (384.5 m 2 /g) explained the superior dispersion stability. Zhao et al [133] further prepared superhigh-exfoliated reduced graphene oxide (SRGO) and conducted tribological experiments on it, as shown in Fig. 8.…”

Section: Self-dispersed Methodsmentioning

confidence: 99%

“…(e) Dispersion stability of nanolubricants with different graphene. Reproduced with permission from Ref [133],. © Elsevier, 2020.…”

mentioning

confidence: 99%

Nanolubricant additives: A review

et al. 2020

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Using nanoadditives in lubricants is one of the most effective ways to control friction and wear, which is of great significance for energy conservation, emission reduction, and environmental protection. With the scientific and technological development, great advances have been made in nanolubricant additives in the scientific research and industrial applications. This review summarizes the categories of nanolubricant additives and illustrates the tribological properties of these additives. Based on the component elements of nanomaterials, nanolubricant additives can be divided into three types: nanometal-based, nanocarbon-based, and nanocomposite-based additives. The dispersion stabilities of additives in lubricants are also discussed in the review systematically. Various affecting factors and effective dispersion methods have been investigated in detail. Moreover, the review summarizes the lubrication mechanisms of nanolubricant additives including tribofilm formation, micro-bearing effect, self-repair performance, and synergistic effect. In addition, the challenges and prospects of nanolubricant additives are proposed, which guides the design and synthesis of novel additives with significant lubrication and antiwear properties in the future.

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“…Employing lubricants with additional friction modifiers produces encouraging results. An extensive overview of literature proclaims that several types of nanomaterials such as nanoparticles, nanosheets, or nanocomposites have been used for the purpose owing to their fast tribo-action. − Nowadays, carbon-based materials such as graphene, fullerene, and carbon nanotubes are the center of attention in this innovative research area. − From our laboratory, too, carbon microspheres, , reduced graphene oxide, and their composites with nanoparticles, doped nanoparticles, or nanosheets have been recently documented as tribologically active materials. − A carbon nitride polymer of high thermal stability possessing graphitic structure g-C 3 N 4 with weak van der Waals forces amid the 2D-nanosheets appears to be very influential in the field. Still, it has been seldom studied. , Zhu et al have described the antiwear performance of bulk g-C 3 N 4 with polyvinylidene difluoride (PVDF) .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Triboactivity of Nanolamellar Graphitic-C₃N₄ by N-Doped ZnO Nanorods

Singh

Shukla

Verma

et al. 2021

Ind. Eng. Chem. Res.

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The tribological activity of the synthesized nanosheets of a polymeric graphitic carbon nitride, g-C3N4, was upgraded by introducing hydrothermally synthesized N-doped zinc oxide nanorods. The high-resolution scanning electron microscopy, TEM, and HR-TEM studies of the hybrid (N–ZnO/g-C3N4) reveal that N-doped ZnO nanorods were spread over g-C3N4 nanosheets. The tribological activity of well-characterized nanomaterials was graded in paraffin oil (PO) at an optimized concentration, 0.20% w/v, on a four-ball tester conducting ASTM D4172 and ASTM D5183 tests. According to the observed tribological data, mean wear scar diameter, friction coefficient (COF), and seizure load, nanorods performed much better than the nanosheets. The hybrid exhibited highly advanced activity because of the synergy between noncovalently interacting nanorods and nanosheets. The SEM and AFM analyses of the wear pathway corroborated the tribological results. The energy-dispersive X-ray and X-ray photoelectron spectroscopy studies of the tribofilm confirmed the elemental composition and chemical states of all the elements, respectively. A possible mechanism of lubrication has been presented.

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Superhigh-exfoliation graphene with a unique two-dimensional (2D) microstructure for lubrication application

Cited by 37 publications

References 32 publications

Recent Advances in 2D Materials for Photodetectors

Recent Advances in 2D Materials for Photodetectors

Nanolubricant additives: A review

Enhancement of Triboactivity of Nanolamellar Graphitic-C₃N₄ by N-Doped ZnO Nanorods

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Superhigh-exfoliation graphene with a unique two-dimensional (2D) microstructure for lubrication application

Cited by 37 publications

References 32 publications

Recent Advances in 2D Materials for Photodetectors

Recent Advances in 2D Materials for Photodetectors

Nanolubricant additives: A review

Enhancement of Triboactivity of Nanolamellar Graphitic-C3N4 by N-Doped ZnO Nanorods

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Enhancement of Triboactivity of Nanolamellar Graphitic-C₃N₄ by N-Doped ZnO Nanorods