Synthesis of graphene from asphaltene molecules adsorbed on vermiculite layers

Xu, Chenggen; Gao, Ning; Zhu, Xiao; Wang, Gang; Liu, Xiaofei; Gao, Jinsen; Zhang, Qiang; Qian, Weizhong; Wei, Fei

doi:10.1016/j.carbon.2013.05.059

Cited by 65 publications

(43 citation statements)

References 34 publications

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“…The resulting carbon monolayer-Mt nanocomposites themselves show special physicochemical properties and applications (Anadão et al, 2011;Bakandritsos et al, 2004Bakandritsos et al, , 2005Zhang et al, 2012), and can be used for synthesizing derivative nanomaterials as well (Xu et al, 2013;Zhang et al, 2012). For example, 2D graphene-like nanomaterials can be obtained by removing Mt layers (Xu et al, 2013). These studies enlighten us that the used Mt could be easily transformed into carbon monolayer-Mt nanocomposites by calcination.…”

Section: Introductionmentioning

confidence: 83%

“…This type of nanocomposites can be obtained by directly intercalating nanomaterials within the interlayer space of clay minerals (Gournis et al, 2004(Gournis et al, , 2006Tsoufis et al, 2013), or by in-situ transforming the pre-intercalated materials into nanomaterials (Ma et al, 2013;Ruiz-Hitzky et al, 2011;Xu et al, 2013;Zhang et al, 2012). Generally, the direct intercalation method is only applicable for very small nanomaterials, e.g., fullerene and its derivatives (Gournis et al, 2004, Applied Clay Science 100 (2014 2006; Tsoufis et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the direct intercalation method is only applicable for very small nanomaterials, e.g., fullerene and its derivatives (Gournis et al, 2004, Applied Clay Science 100 (2014 2006; Tsoufis et al, 2013). As such, the in-situ transformation method draws more attention (Fernandez-saavedra et al, 2008;Ruiz-Hitzky et al, 2011;Xu et al, 2013;Zhang et al, 2012). One example is the insitu synthesis of 2D carbon nanomaterials within Mt interlayer spaces.…”

Section: Introductionmentioning

confidence: 99%

“…One example is the insitu synthesis of 2D carbon nanomaterials within Mt interlayer spaces. Thanks to its layered structure, expandable interlayers, and chemically inert siloxane surface, Mt has been considered as ideal template for insitu transforming pre-intercalated carbon-rich organic compounds into 2D carbon nanomaterials (Bakandritsos et al, 2004(Bakandritsos et al, , 2005BarataRodrigues et al, 2003;Sakintuna and Yurum, 2005;Xu et al, 2013;Zhang et al, 2012). Polymers have most often been used as precursor in previous studies.…”

Section: Introductionmentioning

confidence: 99%

“…After calcining at high temperature (e.g., 400-900°C) under the protection of N 2 , the intercalated polymer can be transformed into carbon monolayer within the interlayer spaces of Mt (Bakandritsos et al, 2004(Bakandritsos et al, , 2005Bandosz et al, 1994Bandosz et al, , 1996Xu et al, 2013;Zhang et al, 2012). The resulting carbon monolayer-Mt nanocomposites themselves show special physicochemical properties and applications (Anadão et al, 2011;Bakandritsos et al, 2004Bakandritsos et al, , 2005Zhang et al, 2012), and can be used for synthesizing derivative nanomaterials as well (Xu et al, 2013;Zhang et al, 2012). For example, 2D graphene-like nanomaterials can be obtained by removing Mt layers (Xu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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An approach to functionalize graphene-based materials has been developed by assembling graphene nanoplatelets (GNP) with clay minerals. Under convenient sonomechanical treatment, clay-GNP mixtures may produce very stable water dispersions in particular using sepiolite fi brous clay. While in the absence of clay a rapid decantation of GNP in water is observed, in the presence of sepiolite the resulting dispersions remain stable during months without syneresis effects. Rigid but fl exible self-supported fi lms are easily obtained by fi ltering of these dispersions. As the electrical percolation threshold corresponds to sepiolite/GNP composites of 0.5:1 in weight, doping these systems with multiwalled carbon nanotubes (MWCNTs) significantly enhances their electrical conductivity. The particular microporosity of the sepiolite component allows interactions with molecules, such as organic dyes, as well as polymers, such as biopolymers, opening the way to functional materials for advanced applications due to their inherent conductivity afforded by the GNP and MWCNTs carbonaceous components. In fact, using very small amount of MWCNT together with GNP can obtain composites with signifi cant electrical conductivity, maintaining the enhanced mechanical properties, at a lower cost.

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Polymer Additives with Gas Barrier and Anti‐Aging Properties Made from Asphaltenes via Supercritical Ethanol

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Advanced Science

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Asphaltene is often regarded as an undesirable by‐product of petroleum processing, possesses vast reserves with little market value. The typical routes of consuming asphaltene, namely burning and landfilling, pose significant environmental challenges. In this study, low‐value asphaltene is converted into high‐value ethylated carbon clusters (ECC) using a supercritical ethanol technique. The resulting ECC powder demonstrates promising properties for high density polyethylene (HDPE) composite applications. The effects of incorporating ECC on the mechanical, gas barrier, and anti‐aging properties of the composite are investigated. Results show that a 1 wt.% ECC led to a 4.2% and 43.5% increase in tensile strength and elongation at break, a reduction of 45.8% and 30.7% in oxygen and carbon dioxide permeability. Furthermore, ECC exhibits effective UV spectrum absorption and conversion in the wavelength range of 400–600 nm, providing protection against UV spectrum damage to HDPE. The incorporation of ECC not only enhances the properties of polymer composites but also sequesters carbon within the polymer matrix, enabling the valorization of asphaltene while mitigating environmental impact.

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Synthesis of graphene from asphaltene molecules adsorbed on vermiculite layers

Cited by 65 publications

References 34 publications

From used montmorillonite to carbon monolayer–montmorillonite nanocomposites

From used montmorillonite to carbon monolayer–montmorillonite nanocomposites

Clay‐Graphene Nanoplatelets Functional Conducting Composites

Polymer Additives with Gas Barrier and Anti‐Aging Properties Made from Asphaltenes via Supercritical Ethanol

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