Research Progress of the Liquid-Phase Exfoliation and Stable Dispersion Mechanism and Method of Graphene

Li, Liangchuan; Zhou, Ming; Jin, Long; Liu, Lincong; Mo, Youtang; Xiao, Li; Mo, Zhaoyou; Liu, Zhenzhao; You, Shengli; Zhu, Hongwei

doi:10.3389/fmats.2019.00325

Cited by 44 publications

(27 citation statements)

References 165 publications

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“…The separation energy is industrially introduced using sonication, shear mixing, or ball milling, in addition to coupling with solvent or surfactant systems that reduce the interfacial energies or attractive forces between graphene sheets. [ 59 ] Following this physical exfoliation, the graphene sheets are then segregated by density and dispersed in solution, with centrifugation commonly being used to separate exfoliated graphene from remaining graphite. [ 60 ]…”

Section: Large‐scale Graphene Synthesismentioning

confidence: 99%

Large‐Scale Syntheses of 2D Materials: Flash Joule Heating and Other Methods

2022

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In the past 17 years, the larger‐scale production of graphene and graphene family materials has proven difficult and costly, thus slowing wider‐scale commercial applications. The quality of the graphene that is prepared on larger scales has often been poor, demonstrating a need for improved quality controls. Here, current industrial graphene synthetic and analytical methods, as well as recent academic advancements in larger‐scale or sustainable synthesis of graphene, defined here as weights more than 200 mg or films larger than 200 cm2, are compiled and reviewed. There is a specific emphasis on recent research in the use of flash Joule heating as a rapid, efficient, and scalable method to produce graphene and other 2D nanomaterials. Reactor design, synthetic strategies, safety considerations, feedstock selection, Raman spectroscopy, and future outlooks for flash Joule heating syntheses are presented. To conclude, the remaining challenges and opportunities in the larger‐scale synthesis of graphene and a perspective on the broader use of flash Joule heating for larger‐scale 2D materials synthesis are discussed.

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Section: Large‐scale Graphene Synthesismentioning

confidence: 99%

Large‐Scale Syntheses of 2D Materials: Flash Joule Heating and Other Methods

2022

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“…The stock solutions were diluted to 100-1000 mg/L using deionized water and a reaction time ranging from 2 to 30 min. rGO/Fe/Cu nanocomposites (10-30 mg) were added into 50 mL of the dye solutions (100-1000 mg/L) with an initial pH (3)(4)(5)(6)(7)(8)(9)(10). The initial solution pH adjustments were performed with HCl (0.1 mol L −1 ) and NaOH (0.1 mol L −1 ) solutions.…”

Section: Batch Decontamination Experimentsmentioning

confidence: 99%

“…Since graphene is a two-dimensional honeycomb planar nanomaterial composed of six-membered rings with only one atomic thickness (0.334 nm), it has a large specific surface area with a theoretical value of up to 2630 m 2 /g. Meanwhile, it has a wide range of applications in the removal of organic and inorganic pollutants from wastewater by adsorption [8,9]. However, graphene generally undergoes stacking and agglomeration, resulting in a large loss of effective surface area and poorer than expected adsorption of the composites, which limits their practical application to some extent.…”

Section: Introductionmentioning

confidence: 99%

Binary Dye Removal from Simulated Wastewater Using Reduced Graphene Oxide Loaded with Fe-Cu Bimetallic Nanocomposites Combined with an Artificial Neural Network

Xin

Xiang

et al. 2021

Materials

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Reduced graphene oxide loaded with an iron-copper nanocomposite was prepared in this study, using graphene oxide as a carrier and ferrous sulfate, copper chloride and sodium borohydride as raw materials. The obtained material was prepared for eliminating hazardous dye carmine and the binary dye mixture of carmine and Congo red. The process of carmine dye removal by the nanocomposite was modeled and optimized through response surface methodology and artificial intelligence (artificial neural network–particle swarm optimization and artificial neural network–genetic algorithm) based on single-factor experiments. The results demonstrated that the surface area of the nanocomposite was 41.255 m2/g, the pore size distribution was centered at 2.125 nm, and the saturation magnetization was up to 108.33 emu/g. A comparison of the material before and after the reaction showed that the material could theoretically be reused three times. The absolute error between the predicted and experimental values derived by using artificial neural network–particle swarm optimization was the smallest, indicating that this model was suitable to remove carmine from simulated wastewater. The dose factor was the key factor in the adsorption process. This process could be described with the pseudo-second-order kinetic model, and the maximum adsorption capacity was 1848.96 mg/g. The removal rate of the mixed dyes reached 96.85% under the optimal conditions (the dosage of rGO/Fe/Cu was 20 mg, the pH was equal to 4, the initial concentration of the mixed dyes was 500 mg/L, and the reaction time was 14 min), reflecting the excellent adsorption capability of the material.

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“…After graphene was discovered (Geim and Novoselov, 2010), it has frequently demonstrated some novel properties due to its very special monolayer structure (Butler et al, 2013;Kim et al, 2015;Xu et al, 2015;Wei et al, 2016;Gao et al, 2017;Zaminpayma et al, 2017;Zhang et al, 2018;Zhou et al, 2018;Sun and Schwingenschlögl, 2021a), which has attracted tremendous investigations to explore the other excellent characteristics and applications of two-dimensional (2D) materials (Li et al, 2014;Li et al, 2019;Li et al, 2021;Vahedi Fakhrabad et al, 2015;Keyte et al, 2019;Xu et al, 2020;Ren et al, 2021a;Ren et al, 2021b;. For instance, biphenylene, a graphene-like material, was prepared, which is metallic, instead of dielectric (Fan et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

The Thermal and Electronic Properties of the Lateral Janus MoSSe/WSSe Heterostructure

et al. 2022

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Two-dimensional materials have opened up extensive applications for traditional materials. In particular, heterostructures can further create fantastic performances. In this investigation, the lateral heterostructure was constructed using Janus MoSSe and WSSe monolayers with armchair and zigzag interfaces. Performing first-principles calculations and molecular dynamics simulation method, the thermal stability and the semiconductor characteristics with the type-II band structure to separate the photogenerated charges of such Janus MoSSe/WSSe heterostructure are presented, which suggests the potential application of acting as a photocatalyst for water splitting. Importantly, the asymmetric interface of the Janus MoSSe/WSSe heterostructure can result in natural bending, which limits the heat flow transport. Smaller heat flow and the interfacial thermal resistance of the lateral MoSSe/WSSe heterostructure with a zigzag edge interface are mainly due to suppressed acoustic branches. These structural symmetry and interface-dependent properties show the future applications in photovoltaic and thermoelectric devices.

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Research Progress of the Liquid-Phase Exfoliation and Stable Dispersion Mechanism and Method of Graphene

Cited by 44 publications

References 165 publications

Large‐Scale Syntheses of 2D Materials: Flash Joule Heating and Other Methods

Large‐Scale Syntheses of 2D Materials: Flash Joule Heating and Other Methods

Binary Dye Removal from Simulated Wastewater Using Reduced Graphene Oxide Loaded with Fe-Cu Bimetallic Nanocomposites Combined with an Artificial Neural Network

The Thermal and Electronic Properties of the Lateral Janus MoSSe/WSSe Heterostructure

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