Synthesis of graphene from naphthalene molecules on the surface of a Langmuir monolayer

Kolesnikova, A. S.; Safonov, Roman A.; Shinkarenko, O.; Chumakov, A. S.; Soldatenko, E.M.; Glukhovskoy, E. G.

doi:10.1134/s1027451017030089

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…Particularly, in the base oil AN-5, the naphthalene ring of the sixmembered cyclic structure is adsorbed onto the nickel-nickel oxides layer in a at-lying chemisorption mode [28,29], where the carbon atoms in the naphthalene ring bind to the nickel atom, and then the interfacial dehydrogenation occurs under the catalytic effect of Ni while the reorganization of the neighboring rings occurs to form amorphous carbon lm. The naphthalene itself, with cyclic structure, is often used as a precursor for graphene synthesis [30][31][32]. This could well explain why Ni-RF added in AN-5 exhibits the best friction-reduction performance for the steel-steel sliding pair (corresponding to a high graphitization degree of carbon lm).…”

Section: Tribomechanismmentioning

confidence: 99%

Effect of Nickel Acetyl Acetonate as Lubricant Additive in Base Oils with Different Molecular Structure on In-Situ Formation and Tribomechanism of Carbon-Based Tribofilms of Steel-Steel Sliding Pair

Peng,

Fan,

Song

et al. 2024

Tribol Lett

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Nickel acetyl acetonate (Ni(acac) 2 ), a metal-organic compound, was directly dispersed in base oils alkylated naphthalene (AN-5), diisooctyl sebacate (DIOS), poly-α-ole n (PAO6), and 150N in the presence of commercial dispersant RF1151 (monoallyl poly(isobutylene succinimide). The tribological properties of the lubricants were tested with a four-ball friction and wear tester. The friction-induced in-situ formation of carbon lms on rubbed steel surfaces under the catalysis of Ni(acac) 2 was investigated, and the as-formed carbon lms were characterized by scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The results show that Ni(acac) 2 added in the base oils can release metallic Ni to form nickel layer on the rubbed metal sub-surfaces and catalyze the degradation of the base oil molecules adsorbed to form carbon-based tribo lms. The carbon lm formed from AN-5 with six-membered ring structure has a high degree of graphitization and the best frictionreducing and antiwear abilities, and those formed from PAO6 and 150N with linear structure have a low degree of graphitization as well as good tribological properties. Under the lubrication of DIOS with Ni(acac) 2 , however, there is no carbon lm formation while the tribological properties of the lubricant are relatively poor, due to the absence of the catalytic metallic Ni and nickel oxide layer on the rubbed metal sub-surface. Thanks to the catalytic effect of metallic Ni released from Ni(acac) 2 for the degradation of various base oils with different molecular structure, the present approach could provide a rational pathway to tune the in-situ formation of carbon-based tribo lm on rubbed steel surfaces so as to effectively reduce the friction and wear of steel-steel sliding pair.

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Section: Tribomechanismmentioning

confidence: 99%

Effect of Nickel Acetyl Acetonate as Lubricant Additive in Base Oils with Different Molecular Structure on In-Situ Formation and Tribomechanism of Carbon-Based Tribofilms of Steel-Steel Sliding Pair

Peng,

Fan,

Song

et al. 2024

Tribol Lett

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“…The bottom-up approach implements carbon atoms as building blocks; epitaxial growth of graphite on SiC surfaces and chemical vapor deposition are the most sophisticated methods [17]. Further, various inexpensive and simple molecules such as naphthalene, benzene, hexane, alfalfa plant, glucose, and cellulose can be utilized as a starting material in this approach [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…The eco-friendly production of graphene by the electrochemical exfoliation of graphite in molten LiCl (Green Chemistry 18 (2016), 1952-1964), molten NaCl (Journal of Industrial and Engineering Chemistry 52 (2017), [18][19][20][21][22][23][24][25][26][27], and molten LiCl-NaCl (Applied Surface Science 490 (2019), 383-394) has been demonstrated [30][31][32]. Also, the chemical exfoliation of graphite powder in molten LiCl was reported.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Graphene from Graphite in Molten Salt Medium

Gürünlü

Yücedağ

2020

Journal of Nanomaterials

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Green synthesis of graphene from graphite was carried out in molten salt mixture of LiCl-KCl, which is an environmentally friendly alternative to traditional methods using a large number of chemicals. The effect of carbonization temperature on the final properties of graphene products was investigated at a temperature range of 500-800°C. The layer numbers of graphene products were determined as a single layer and few layers by XRD and Raman analyses. The highest conductivity value of 1219 S/m was reached with the sample synthesized at 600°C (GGr600), which is 10-fold higher than that of commercial graphene (CG) (115 S/m). The percentage of carbon contents of GGr600 and sample synthesized at 800°C (GGr800) was determined as 86% and 73% by XPS. From the SEM analyses, it was observed that graphene products have sheet-like structures. A TEM image showed that GGr800 has the thickness changing from 5-9 nm, pointing out the graphene with few layers. AFM analysis demonstrated that GGr600 has a single-layer sheet-like structure.

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“…In this study, we propose the next stage in the development of the method that we described in [8,9]. By analogy with the Shole reaction, we have described a method for producing graphene sheets by crosslinking molecules of polycyclic aromatic hydrocarbons (such as naphthalene, pyrene, pyrene butyric acid).…”

Section: Introductionmentioning

confidence: 99%

Catalytic pyrene and pyrene butyric acid condensation as a means of producing graphene

Shinkarenko¹,

Pozharov²,

Kolesnikova³

et al. 2018

Nanosystems: Phys. Chem. Math.

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In the present study, we have conducted molecular modeling of a potential method of graphene sheet formation. As the nano-sized blocks from which graphene can be synthesized, pyrene and pyrene butyric acid are chosen. The potential of several compounds (namely, Pt, Pd, Ni, AlCl 3 and PdCl 4) as catalysts for hydrocarbon condensation has been estimated by semiempirical calculations. The heat of formation in the series Pt, Pd, Ni, PdCl 4 , AlCl 3 for pyrene is reduced to a minimum and reaches a value of 99 kJ/mol, and for pyrene butyric acid in the series Pt, Ni, Pd, PdCl 4 , AlCl 3 decreases to 295 kJ/mol. According to the results of calculations, Pt and Ni can be the most effective catalysts for this reaction. As a substrate (or 2D nanoscale), we propose to use a surface of water or a monolayer of surfactants on water (this method is realized by the Langmuir-Blodgett method) having a 2D crystal structure whose state can be controlled by external conditions.

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Synthesis of graphene from naphthalene molecules on the surface of a Langmuir monolayer

Cited by 4 publications

References 22 publications

Effect of Nickel Acetyl Acetonate as Lubricant Additive in Base Oils with Different Molecular Structure on In-Situ Formation and Tribomechanism of Carbon-Based Tribofilms of Steel-Steel Sliding Pair

Effect of Nickel Acetyl Acetonate as Lubricant Additive in Base Oils with Different Molecular Structure on In-Situ Formation and Tribomechanism of Carbon-Based Tribofilms of Steel-Steel Sliding Pair

Green Synthesis of Graphene from Graphite in Molten Salt Medium

Catalytic pyrene and pyrene butyric acid condensation as a means of producing graphene

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