Macroscopic‐Scale Template Synthesis of Robust Carbonaceous Nanofiber Hydrogels and Aerogels and Their Applications

Liang, Hai‐Wei; Guan, Qing‐Fang; Chen, Lifeng; Zhu, Zhu; Zhang, Wenjun; Yu, Shu‐Hong

doi:10.1002/anie.201200710

Cited by 632 publications

(376 citation statements)

References 28 publications

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“…23 Recently, the design and fabrication of 2D or 3D multifunctional materials has attracted wide scientic attention, which has become an increasingly hot research topic. [24][25][26] For example, 3D multifunctional graphene-based hydrogels and aerogels have been fabricated on a large scale through a metal ion induced self-assembly approach. 27 Graphene was considered as a rapidly rising star material and attracted a great deal of attention owing to its excellent mechanical, electrical, thermal, and optical properties.…”

Section: Introductionmentioning

confidence: 99%

Fusion of nacre, mussel, and lotus leaf: bio-inspired graphene composite paper with multifunctional integration

et al. 2013

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Multifunctional integration is an inherent characteristic for biological materials with multiscale structures. Learning from nature is an effective approach for scientists and engineers to construct multifunctional materials. In nature, mollusks (abalone), mussels, and the lotus have evolved different and optimized solutions to survive. Here, bio-inspired multifunctional graphene composite paper was fabricated in situ through the fusion of the different biological solutions from nacre (brick-and-mortar structure), mussel adhesive protein (adhesive property and reducing character), and the lotus leaf (self-cleaning effect). Owing to the special properties (self-polymerization, reduction, and adhesion), dopamine could be simultaneously used as a reducing agent for graphene oxide and as an adhesive, similar to the mortar in nacre, to crosslink the adjacent graphene. The resultant nacre-like graphene paper exhibited stable superhydrophobicity, self-cleaning, anticorrosion, and remarkable mechanical properties underwater. Multifunctional integration is an inherent characteristic for biological materials with multiscale structures.Learning from nature is an effective approach for scientists and engineers to construct multifunctional materials. In nature, mollusks (abalone), mussels, and the lotus have evolved different and optimized solutions to survive. Here, bio-inspired multifunctional graphene composite paper was fabricated in situ through the fusion of the different biological solutions from nacre (brick-and-mortar structure), mussel adhesive protein (adhesive property and reducing character), and the lotus leaf (self-cleaning effect).Owing to the special properties (self-polymerization, reduction, and adhesion), dopamine could be simultaneously used as a reducing agent for graphene oxide and as an adhesive, similar to the mortar in nacre, to crosslink the adjacent graphene. The resultant nacre-like graphene paper exhibited stable superhydrophobicity, self-cleaning, anti-corrosion, and remarkable mechanical properties underwater.

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Section: Introductionmentioning

confidence: 99%

Fusion of nacre, mussel, and lotus leaf: bio-inspired graphene composite paper with multifunctional integration

et al. 2013

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“…1 displays the absorption capacities of samples as a function of reduction period from 0 h (i.e., GO) to 10 h. The absorption capacities of the 3D srGO-based sorbents were measured in a range from 319× (chloroform) to 179× (acetone) their own weights. Despite the low-temperature reduction process used here, these absorption capacities for oils and organic solvents are considerably higher than those in various carbon-based 3D architectures [1][2][3][5][6][7], except for the high-temperature-processed ultralight N-doped graphene frameworks [4]. Differently from the previous studies on the carbon-based sorbents with the ployed to produce porous graphene-based materials on a large scale [3][4][5][6][10][11][12].…”

Section: Absorption Capacitiesmentioning

confidence: 61%

“…2c) are slightly higher than the typical C/O ratio of GO (<4 for an empirical definition of GO); however, they are considerably lower than those prepared by other reduction methods [10,[17][18][19][20]. Considering that the saturated absorption values of the thermally reduced samples (for the heating time of 1 h) were observed at the C/O ratio of 4.32, it is worth noting that the removal of hydroxyl groups on the slightly reduced GO sorbents is critical for achieving their maximum capacities, which is greater than those of other carbon-based macrostructures [1][2][3][5][6][7].…”

Section: Preparation Of Rgo-based Sorbentsmentioning

confidence: 94%

“…Recently, porous carbon-based macrostructures consisting of low-dimensional carbon nanomaterials, such as one-dimensional carbon nanotubes and two-dimensional (2D) graphene sheets, have been intensively developed as next-generation pollutant sorbents that can replace the conventional absorbent materials [1][2][3][4][5][6][7]. The eminent absorption properties of these nano carbon-based sorbents (e.g., high loading capacities, rapid absorption rates, robust recyclability, and high selectivity) mainly stem from their extensive specific surface area (SSA) and intrinsic hydrophobicity [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Sorption behavior of slightly reduced, three-dimensionally macroporous graphene oxides for physical loading of oils and organic solvents

Park¹,

Kang²

2016

Carbon letters

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High pollutant-loading capacities (up to 319 times its own weight) are achieved by threedimensional (3D) macroporous, slightly reduced graphene oxide (srGO) sorbents, which are prepared through ice-templating and consecutive thermal reduction. The reduction of the srGO is readily controlled by heating time under a mild condition (at 1 10 -2 Torr and 200°C). The saturated sorption capacity of the hydrophilic srGO sorbent (thermally reduced for 1 h) could not be improved further even though the samples were reduced for 10 h to achieve the hydrophobic surface. The large meso-and macroporosity of the srGO sorbent, which is achieved by removing the residual water and the hydroxyl groups, is crucial for achieving the enhanced capacity. In particular, a systematic study on absorption parameters indicates that the open porosity of the 3D srGO sorbents significantly contributes to the physical loading of oils and organic solvents on the hydrophilic surface. Therefore, this study provides insight into the absorption behavior of highly macroporous graphene-based macrostructures and hence paves the way to development of promising next-generation sorbents for removal of oils and organic solvent pollutants.

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“…[53] In the template-directed assembly process, some templates are often used, such as cellulose, [54] electrospun SiO 2 nanofibers, [55,56] and tellurium nanowires (TeNWs). [57] The templates of TeNWs are ultrathin with diameters of 7-9 nm and lengths of several micrometers, which can be prepared by our group in a kilogram scale with a one-pot hydrothermal process. [58,59] We used the well-developed TeNWs as effective templates to assemble CNF gels consisting of highly uniform CNFs.…”

Section: Template-directed Assembly Methodsmentioning

confidence: 99%

Macroscopic‐Scale Three‐Dimensional Carbon Nanofiber Architectures for Electrochemical Energy Storage Devices

Chen

Feng

Liang

et al. 2017

Advanced Energy Materials

Self Cite

170

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Therefore, it is necessary to develop highperformance energy storage devices for facilitating the effective utilization of intermittent renewable energy sources. [7][8][9] Among varieties of electrochemical energy storage devices, supercapacitors (known as electrochemical capacitors) [10,11] and some rechargeable batteries (lithium-ion batteries (LIBs), lithiumsulfur (Li-S) batteries, and metal-O 2 batteries) [12][13][14][15] are at the frontier, because they can transport high power and store high energy. Nowadays, they play an indispensable role in our daily life by powering numerous portable electronic devices (e.g., cell phones and laptops), hybrid electric vehicles, and large-scale electrical grids. [16][17][18][19] It is well accepted that the performance of energy storage devices mainly depended on their electrode materials. [20,21] Owing to the advantages of large surface area, light weight, good electrical conductivity, and high thermal/ chemical stability, carbon materials have been considered as the most important electrode materials of supercapacitors and rechargeable batteries [8,20,21] Hence, various nanostructured carbons, such as carbon/graphene quantum dots, [22,23] carbon nanofiber (CNFs), [16,24] carbon nanotubes (CNTs), [13,25] graphene [26][27][28][29][30][31][32] carbon nanosheets, [33,34] 3D carbon nanostructures, [35][36][37] and porous carbon, [38,39] have gained great attention. Among these materials, 3D carbon nanomaterials have some advantages. The interlinked architecture not only shortens transport distances for ions in the well-interconnected wall structure, but also provides a continuous pathway endowing for the fast electron transport. [40] Moreover, the structural interconnectivities guarantee higher electrical conductivity and better mechanical stability. [36,41] Thereby, the design and fabrication of various 3D carbonbased nanostructures, including carbon nanotube networks, graphene gels, graphene foams, and 3D CNFs, have been intensively investigated.Over the past few years, there are many reviews summarizing the progress of fabricating 3D carbon-based nanomaterials. For example, Schneider et al. overviewed the recent advance in the synthesis of 3D arranged carbon nanotube architectures. [42] Li et al. reviewed the carbon-based 3D nanostructures for supercapacitors. [36] Cao and Gui et al. comprehensively reviewed the recent progress in synthesis, properties, and energy applications of CNT sponges, aerogels, and hierarchical composites. [43] The development of high-performance electrochemical energy storage devices is critical for addressing energy crises and environmental pollution.

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Macroscopic‐Scale Template Synthesis of Robust Carbonaceous Nanofiber Hydrogels and Aerogels and Their Applications

Cited by 632 publications

References 28 publications

Fusion of nacre, mussel, and lotus leaf: bio-inspired graphene composite paper with multifunctional integration

Fusion of nacre, mussel, and lotus leaf: bio-inspired graphene composite paper with multifunctional integration

Sorption behavior of slightly reduced, three-dimensionally macroporous graphene oxides for physical loading of oils and organic solvents

Macroscopic‐Scale Three‐Dimensional Carbon Nanofiber Architectures for Electrochemical Energy Storage Devices

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