Cost effective production of high quality multilayer graphene in molten Sn bubble column by using CH4 as carbon source

Qiao, Changcang; Che, Jian; Wang, Junseng; Wang, Xiufang; Qiu, Song; Wu, Wei; Chen, Yuanzheng; Zu, Xiaotao; Tang, Yongliang

doi:10.1016/j.jallcom.2022.167495

Cited by 13 publications

(5 citation statements)

References 58 publications

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“…was utilized as a molten catalyst, and the effect of reaction conditions on graphene growth was investigated, finding that higher growth temperatures and lower methane concentrations resulted in fewer defects and higher quality graphene within a temperature range of 1100-1300 • C. 40 Qiao produced multilayer graphene at 1250 • C using molten Sn. 48 In comparison with other works involving molten Sn, elevating the temperature from 1000 to 1250 • C led to graphene formation, further illustrating the promotion of temperature on ordered growth of carbon materials. In Zhao's study, NaCl/KCl melts doped with transition metal chlorides (Cr, Fe, Ru, Ni, Pd, Cu) were employed, achieving the production of graphene and carbon black mixtures, also emphasizing the enhancement of methane thermal pyrolysis activity and the promotion of graphitic carbon formation by transition metal chlorides.…”

Section: Fabrication Of Graphitic Carbon Via Molten Metal or Salt Com...mentioning

confidence: 65%

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Recent progress in melt pyrolysis: Fabrication and applications of high‐value carbon materials from abundant sources

Zhang,

Huang,

Yang

et al. 2023

SusMat

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The escalating demand for sophisticated carbon products, including carbon black, carbon nanotubes (CNTs), and graphene, has yet to be adequately addressed by conventional techniques with respect to large‐scale, efficient, and controllable carbon material synthesis. Molten pyrolysis emerges as a propitious strategy for generating such high‐value carbon materials. Abundant carbon sources encompassing methane (CH4), carbon dioxide (CO2), biomass, and plastics can undergo thermal decomposition into carbon constituents within molten metal or salt media. This methodology not only obviates dependence on traditional fossil fuels but additionally enables modulation of carbon material morphologies by varying the molten media, thereby presenting substantial potential for effective and controlled carbon material fabrication. In this review, we examine the capacity of molten pyrolysis in producing high‐value carbon materials derived from CH4, CO2, biomass, and plastics. Concurrently, we present a detailed overview of the potential applications of this novel methodology, particularly emphasizing its relevance in the fields of supercapacitors, flexible materials, and electrochemical cells. Furthermore, we contemplate future trajectories for molten pyrolysis, accentuating that amalgamation with auxiliary processes or technologies—like renewable energy systems and carbon capture and storage—represents a remarkably promising route for continued investigation.

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Section: Fabrication Of Graphitic Carbon Via Molten Metal or Salt Com...mentioning

confidence: 65%

“…Qiao produced multilayer graphene at 1250°C using molten Sn 48 . In comparison with other works involving molten Sn, elevating the temperature from 1000 to 1250°C led to graphene formation, further illustrating the promotion of temperature on ordered growth of carbon materials.…”

Section: Methane Pyrolysis To Fabricate Carbon Productsmentioning

confidence: 71%

Recent progress in melt pyrolysis: Fabrication and applications of high‐value carbon materials from abundant sources

Zhang,

Huang,

Yang

et al. 2023

SusMat

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“…In the context of graphene synthesis, the major challenge is in the production of largescale high-quality graphene at a low cost. To address this issue, scientists Shi et al proposed non-electrified electrochemical exfoliation method [57], Li et al proposed salt and water co-assisted exfoliation of graphite in organic solvent [58], Islam et al presented a protocol for ultrafast chemical-free graphite exfoliation [59], Shi et al focused on bubble-mediated mass production [60], whereas Qiao et al proposed use of CH 4 as carbon source [61]. Owing to graphene's vast applications, its large-scale high-quality low-cost production is one of the most researched topics nowadays.…”

Section: Methodology: Graphene Synthesis Techniques and Graphene Tran...mentioning

confidence: 99%

Recent Advancements in Applications of Graphene to Attain Next-Level Solar Cells

Bagade

Patel²,

Malik

et al. 2023

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This paper presents an intensive review covering all the versatile applications of graphene and its derivatives in solar photovoltaic technology. To understand the internal working mechanism for the attainment of highly efficient graphene-based solar cells, graphene’s parameters of control, namely its number of layers and doping concentration are thoroughly discussed. The popular graphene synthesis techniques are studied. A detailed review of various possible applications of utilizing graphene’s attractive properties in solar cell technology is conducted. This paper clearly mentions its applications as an efficient transparent conducting electrode, photoactive layer and Schottky junction formation. The paper also covers advancements in the 10 different types of solar cell technologies caused by the incorporation of graphene and its derivatives in solar cell architecture. Graphene-based solar cells are observed to outperform those solar cells with the same configuration but lacking the presence of graphene in them. Various roles that graphene efficiently performs in the individual type of solar cell technology are also explored. Moreover, bi-layer (and sometimes, tri-layer) graphene is shown to have the potential to fairly uplift the solar cell performance appreciably as well as impart maximum stability to solar cells as compared to multi-layered graphene. The current challenges concerning graphene-based solar cells along with the various strategies adopted to resolve the issues are also mentioned. Hence, graphene and its derivatives are demonstrated to provide a viable path towards light-weight, flexible, cost-friendly, eco-friendly, stable and highly efficient solar cell technology.

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“…MLG was prepared using the B-CVD method. The detailed preparation process is described in reference [19]. In brief, the B-CVD method employs molten Sn as a catalyst.…”

Section: Preparation Of Mlg Powdermentioning

confidence: 99%

“…In our previous studies, high-quality wrinkled multilayer graphene (MLG) was prepared using a cheap bubble chemical vapor deposition (B-CVD) method [19]. This MLG shares similar properties with CVD MLG, namely, high thermal and electrical conductivity and stability.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Field Emission Characteristics of High-Quality Wrinkled Multilayer Graphene Cathodes

Lv,

Wang,

et al. 2024

Nanomaterials

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Field emission (FE) necessitates cathode materials with low work function and high thermal and electrical conductivity and stability. To meet these requirements, we developed FE cathodes based on high-quality wrinkled multilayer graphene (MLG) prepared using the bubble-assisted chemical vapor deposition (B-CVD) method and investigated their emission characteristics. The result showed that MLG cathodes prepared using the spin-coating method exhibited a high field emission current density (~7.9 mA/cm2), indicating the excellent intrinsic emission performance of the MLG. However, the weak adhesion between the MLG and the substrate led to the poor stability of the cathode. Screen printing was employed to prepare the cathode to improve stability, and the influence of a silver buffer layer was explored on the cathode’s performance. The results demonstrated that these cathodes exhibited better emission stability, and the silver buffer layer further enhanced the comprehensive field emission performance. The optimized cathode possesses low turn-on field strength (~1.5 V/μm), low threshold field strength (~2.65 V/μm), high current density (~10.5 mA/cm2), and good emission uniformity. Moreover, the cathode also exhibits excellent emission stability, with a current fluctuation of only 6.28% during a 4-h test at 1530 V.

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Cost effective production of high quality multilayer graphene in molten Sn bubble column by using CH4 as carbon source

Cited by 13 publications

References 58 publications

Recent progress in melt pyrolysis: Fabrication and applications of high‐value carbon materials from abundant sources

Recent progress in melt pyrolysis: Fabrication and applications of high‐value carbon materials from abundant sources

Recent Advancements in Applications of Graphene to Attain Next-Level Solar Cells

A Study on the Field Emission Characteristics of High-Quality Wrinkled Multilayer Graphene Cathodes

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