Production of graphene–boron nitride hybrid nanosheets by liquid-phase exfoliation

Güler, Ömer; Güler, Seval Hale

doi:10.1016/j.ijleo.2016.02.033

Cited by 24 publications

(15 citation statements)

References 20 publications

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“…A bond that kept stratified sheets together was a weak bond. The liquid phase exfoliation method is based on making sheets free by rupturing the weak bonds that binds sheets with each other [19][20][21]. An organic solvent is used to achieve this.…”

Section: Resultsmentioning

confidence: 99%

“…In our previous studies, graphene was produced by using the method of liquid phase exfoliation assisted by a milling process [18]. A graphene-BNNS mixture was successfully produced only by using the liquid phase exfoliation method in our previous study [19]. In this study, on the other hand, producibility of graphene-BNNS heterostructures by a milling process and subsequently by an exfoliation method was investigated.…”

Section: Introductionmentioning

confidence: 87%

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The production of graphene–boron nitride nanosheet heterostructures via liquid phase exfoliation assisted by a milling process

Güler

Taşkın

2019

Bull Mater Sci

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Graphene-boron nitride (BN) nanosheet heterostructures have become one of the highly interesting matters in recent times owing to their advantages. In this study, the liquid phase exfoliation method was preferred for production of graphene-BN nanosheet heterostructures. However, a pre-milling process was applied to starting materials, instead of the classical liquid phase exfoliation method previously used in the literature. Hexagonal graphite (h-G) and h-BN mixtures were milled for 50 h and the milled powders were subjected to the liquid phase exfoliation process. As a result of the examinations, it was observed that graphene-BN nanosheet heterostructures were successfully synthesized. The widths of the synthesized nanosheets were 300-500 nm and nanosheets were multi-layers. It was seen that a large part of the powder mixture were occurred at high amorphization during the ball milling process. According to X-ray diffraction (XRD) peaks, the amorphization ratio was almost 90%. But, almost all of amorphous structures were removed during acid mixing and the thermal process. But, amorphous structures still existed in samples. In addition, the ball milling process damaged the sheets and defects formed. Despite all these disadvantages, the milling process carried out in this study provided formation of thinner and larger sheets compared with previous similar studies.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 87%

The production of graphene–boron nitride nanosheet heterostructures via liquid phase exfoliation assisted by a milling process

Güler

Taşkın

2019

Bull Mater Sci

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“…FTIR analysis (Figure b) reveals a broad band around 3000–3700 cm –1 , assigned to O–H stretching vibration . Bands at 632, 1056, 1110, 1380, and 1450 cm –1 are attributed to the Cu–O bond (optically active lattice vibration in the oxide), C–O stretching, C–O–C stretching, C–OH, and the bending mode of B–O bonds, respectively. − The transmission bands at 1560, 1632, 1715, 2340, and 2935 cm –1 are labeled as a typical carboxylate (COO – ) functional group, -OH bending vibration, a signal originating from the surface-adsorbed H 2 O, a CO group (carbonyl), a typical CO asymmetric stretching vibration line, and aliphatic C–H stretching accordingly. ,,, …”

Section: Resultsmentioning

confidence: 99%

Effective Surface Area Tuning of Noble Metal-Free CuBO₂/rGO Nanohybrid for Efficient Hydrogen Production with “On–Off” Switching

Santra

Das

Das³

2018

ACS Appl. Energy Mater.

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Noble metal-free CuBO 2 /rGO nanohybrid is synthesized and examined as a catalyst for NaBH 4 hydrolysis. Detailed characterization reveals that the hybridization generates a charge imbalance between CuBO 2 and rGO and creates an electron transport channel which facilitates H 2 generation during NaBH 4 hydrolysis. High surface roughness, consequently with high effective surface area, is obtained by varying the synthesis conditions. The high activity (specific rate activity, 2500 mL min −1 g −1 ) and low activation energy (49.8 kJ mol −1 ) establish this noble metal-free catalyst as a potential candidate in the field of fuel cell based hydrogen economy. The mechanistic investigation confirms that protonation and deprotonation can control the H 2 generation kinetics and the same is validated by changing the pH of the reaction medium for an on-site and on-demand H 2 production with easy "on− off" switching.

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“…Graphene/BN hybrid structures can be obtained by exfoliation in liquid-phase. 33 Graphite and BN were added to a mixture (conc. H 2 SO 4 and HNO 3 ) to obtain a hybrid compound.…”

Section: Acs Applied Materials and Interfacesmentioning

confidence: 99%

Borocarbonitrides, B_xC_yN_z: Synthesis, Characterization, and Properties with Potential Applications

Rao

Gopalakrishnan

2016

ACS Appl. Mater. Interfaces

112

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Borocarbonitrides, BCN, constitute a new family of layered two-dimensional materials and can be considered to be derived from graphene. They can be simple composites containing graphene and BN domains or more complex materials possessing B-C and C-N bonds besides B-N and C-C bonds. Properties of these materials depend on the composition, and the method of synthesis, wherein one can traverse from the insulating end (BN) to the conducting end (graphene). In this article, we present an up-to-date review of the various aspects of borocarbonitrides including synthesis, characterization and properties. Some of the properties have potential applications, typical of them being in gas adsorption and energy devices such as supercapacitors, fuel cells and batteries. Performance of borocarbonitrides as catalysts in the electrochemical hydrogen evolution reaction is impressive. It is noteworthy that with certain compositions on borocarbonitrides, field-effect transistors can be fabricated.

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Production of graphene–boron nitride hybrid nanosheets by liquid-phase exfoliation

Cited by 24 publications

References 20 publications

The production of graphene–boron nitride nanosheet heterostructures via liquid phase exfoliation assisted by a milling process

The production of graphene–boron nitride nanosheet heterostructures via liquid phase exfoliation assisted by a milling process

Effective Surface Area Tuning of Noble Metal-Free CuBO₂/rGO Nanohybrid for Efficient Hydrogen Production with “On–Off” Switching

Borocarbonitrides, B_xC_yN_z: Synthesis, Characterization, and Properties with Potential Applications

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Production of graphene–boron nitride hybrid nanosheets by liquid-phase exfoliation

Cited by 24 publications

References 20 publications

The production of graphene–boron nitride nanosheet heterostructures via liquid phase exfoliation assisted by a milling process

The production of graphene–boron nitride nanosheet heterostructures via liquid phase exfoliation assisted by a milling process

Effective Surface Area Tuning of Noble Metal-Free CuBO2/rGO Nanohybrid for Efficient Hydrogen Production with “On–Off” Switching

Borocarbonitrides, BxCyNz: Synthesis, Characterization, and Properties with Potential Applications

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Effective Surface Area Tuning of Noble Metal-Free CuBO₂/rGO Nanohybrid for Efficient Hydrogen Production with “On–Off” Switching

Borocarbonitrides, B_xC_yN_z: Synthesis, Characterization, and Properties with Potential Applications