451
|
Black hemostatic sponge based on facile prepared cross-linked graphene. Colloids Surf B Biointerfaces 2015; 132:27-33. [PMID: 26001799 DOI: 10.1016/j.colsurfb.2015.04.067] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 04/29/2015] [Accepted: 04/30/2015] [Indexed: 01/03/2023]
Abstract
In this study, we demonstrate for the first time the remarkable hemostatic performance of a cross-linked graphene sponge (CGS) as a superb hemostat. The CGS can absorb plasma immediately (<40 ms) to form a blood cell layer and promotes subsequent clotting. The interaction between the interface of the CGS and blood cells reveals that the fast blood coagulation is primarily attributed to the enrichment of hemocytes and platelets on the wound surface. An in vitro dynamic whole-blood clotting test further highlights the effectiveness of the CGS. Considering the facile preparation, low cost, nontoxicity, and long shelf life of the portable black sponge, the CGS has great potential for trauma treatment.
Collapse
|
452
|
Wang C, Li Y, He X, Ding Y, Peng Q, Zhao W, Shi E, Wu S, Cao A. Cotton-derived bulk and fiber aerogels grafted with nitrogen-doped graphene. NANOSCALE 2015; 7:7550-7558. [PMID: 25864553 DOI: 10.1039/c5nr00996k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Three-dimensional graphene-based structures such as graphene aerogels or foams have shown applications in energy, environmental matters, and many other areas. Here, we present a method to convert raw cotton into functional aerogels containing a significant amount of nitrogen-doped graphene (N-graphene) sheets grafted on carbonized cellulose fibers. Urea was introduced into raw cotton as a molecular template as well as a nitrogen source to synthesize mushroom-like N-graphene sheets strongly attached to cotton skeletons. The excellent processability of raw cotton allows us to configure bulk or meter-long fiber shaped aerogels, with high porosity and flexibility. Synergistic effects stemming from the integration of N-graphene and carbonized cotton skeletons promise potential applications as conductive electrodes for supercapacitors, with a measured specific capacitance of 107.5 F g(-1) in a two-electrode system. Our results indicate a low-cost and scalable approach toward high-performance graphene-based aerogels and electrodes via biomass templating.
Collapse
Affiliation(s)
- Chunhui Wang
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, P. R. China.
| | | | | | | | | | | | | | | | | |
Collapse
|
453
|
Samad YA, Li Y, Schiffer A, Alhassan SM, Liao K. Graphene foam developed with a novel two-step technique for low and high strains and pressure-sensing applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:2380-5. [PMID: 25620784 DOI: 10.1002/smll.201403532] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 12/21/2014] [Indexed: 05/21/2023]
Abstract
Freestanding, mechanically stable, and highly electrically conductive graphene foam (GF) is formed with a two-step facile, adaptable, and scalable technique. This work also demonstrates the formation of graphene foam with tunable densities and its use as strain/pressure sensor for both high and low strains and pressures.
Collapse
Affiliation(s)
- Yarjan Abdul Samad
- Department of Mechanical Engineering, Khalifa University of Science Technology and Research, Abu Dhabi, 127788, UAE
| | - Yuanqing Li
- Department of Mechanical Engineering, Khalifa University of Science Technology and Research, Abu Dhabi, 127788, UAE
| | - Andreas Schiffer
- Department of Mechanical Engineering, Khalifa University of Science Technology and Research, Abu Dhabi, 127788, UAE
| | | | - Kin Liao
- Department of Mechanical Engineering, Khalifa University of Science Technology and Research, Abu Dhabi, 127788, UAE
| |
Collapse
|
454
|
Xu X, Li H, Zhang Q, Hu H, Zhao Z, Li J, Li J, Qiao Y, Gogotsi Y. Self-Sensing, Ultralight, and Conductive 3D Graphene/Iron Oxide Aerogel Elastomer Deformable in a Magnetic Field. ACS NANO 2015; 9:3969-77. [PMID: 25792130 DOI: 10.1021/nn507426u] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Three-dimensional (3D) graphene aerogels (GA) show promise for applications in supercapacitors, electrode materials, gas sensors, and oil absorption due to their high porosity, mechanical strength, and electrical conductivity. However, the control, actuation, and response properties of graphene aerogels have not been well studied. In this paper, we synthesized 3D graphene aerogels decorated with Fe3O4 nanoparticles (Fe3O4/GA) by self-assembly of graphene with simultaneous decoration by Fe3O4 nanoparticles using a modified hydrothermal reduction process. The aerogels exhibit up to 52% reversible magnetic field-induced strain and strain-dependent electrical resistance that can be used to monitor the degree of compression/stretching of the material. The density of Fe3O4/GA is only about 5.8 mg cm(-3), making it an ultralight magnetic elastomer with potential applications in self-sensing soft actuators, microsensors, microswitches, and environmental remediation.
Collapse
Affiliation(s)
| | | | | | - Han Hu
- §Liaoning Key Lab for Energy Materials and Chemical Engineering, State Key Lab of Fine Chemicals, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Zongbin Zhao
- §Liaoning Key Lab for Energy Materials and Chemical Engineering, State Key Lab of Fine Chemicals, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Jihao Li
- ∥TMSR Research Center and CAS Key Lab of Nuclear Radiation and Nuclear Energy Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, People's Republic of China
| | - Jingye Li
- ∥TMSR Research Center and CAS Key Lab of Nuclear Radiation and Nuclear Energy Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, People's Republic of China
| | - Yu Qiao
- ⊥Department of Structural Engineering, University of California-San Diego, La Jolla, California 92093, United States
| | - Yury Gogotsi
- §Liaoning Key Lab for Energy Materials and Chemical Engineering, State Key Lab of Fine Chemicals, Dalian University of Technology, Dalian 116024, People's Republic of China
- #Department of Materials Science and Engineering and A.J. Drexel Nanotechnology Institute, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|
455
|
He W, Li G, Zhang S, Wei Y, Wang J, Li Q, Zhang X. Polypyrrole/silver coaxial nanowire aero-sponges for temperature-independent stress sensing and stress-triggered Joule heating. ACS NANO 2015; 9:4244-4251. [PMID: 25811954 DOI: 10.1021/acsnano.5b00626] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
To obtain ideal sensing materials with nearly zero temperature coefficient resistance (TCR) for self-temperature-compensated pressure sensors, we proposed an Incipient Network Conformal Growth (INCG) technology to prepare hybrid and elastic porous materials: the nanoparticles (NPs) are first dispersed in solvent to form an incipient network, another component is then introduced to coat the incipient network conformally via wet chemical route. The conformal coatings not only endow NPs with high stability but also offer them additional structural elasticity, meeting requirements for future generations of portable, compressive and flexible devices. The resultant polypyrrole/silver coaxial nanowire hybrid aero-sponges prepared via INCG technology have been processed into a piezoresistive sensor with highly sensing stability (low TCR 0.86 × 10(-3)/°C), sensitivity (0.33 kPa(-1)), short response time (1 ms), minimum detectable pressure (4.93 Pa) after suffering repeated stimuli, temperature change and electric heating. Moreover, a stress-triggered Joule heater can be also fabricated mainly by the PPy-Ag NW hybrid aero-sponges with nearly zero temperature coefficient.
Collapse
Affiliation(s)
| | - Guangyong Li
- §Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | | | - Yong Wei
- §Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | | | | | | |
Collapse
|
456
|
Zeng G, Shi N, Hess M, Chen X, Cheng W, Fan T, Niederberger M. A general method of fabricating flexible spinel-type oxide/reduced graphene oxide nanocomposite aerogels as advanced anodes for lithium-ion batteries. ACS NANO 2015; 9:4227-4235. [PMID: 25783818 DOI: 10.1021/acsnano.5b00576] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
High-capacity anode materials for lithium ion batteries (LIBs), such as spinel-type metal oxides, generally suffer from poor Li(+) and e(-) conductivities. Their drastic crystal structure and volume changes, as a result of the conversion reaction mechanism with Li, severely impede the high-rate and cyclability performance toward their practical application. In this article, we present a general and facile approach to fabricate flexible spinel-type oxide/reduced graphene oxide (rGO) composite aerogels as binder-free anodes where the spinel nanoparticles (NPs) are integrated in an interconnected rGO network. Benefiting from the hierarchical porosity, conductive network and mechanical stability constructed by interpenetrated rGO layers, and from the pillar effect of NPs in between rGO sheets, the hybrid system synergistically enhances the intrinsic properties of each component, yet is robust and flexible. Consequently, the spinel/rGO composite aerogels demonstrate greatly enhanced rate capability and long-term stability without obvious capacity fading for 1000 cycles at high rates of up to 4.5 A g(-1) in the case of CoFe2O4. This electrode design can successfully be applied to several other spinel ferrites such as MnFe2O4, Fe3O4, NiFe2O4 or Co3O4, all of which lead to excellent electrochemical performances.
Collapse
Affiliation(s)
- Guobo Zeng
- †Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093, Zurich, Switzerland
| | - Nan Shi
- ‡State Key Laboratory of Metal Matrix Composites, Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Michael Hess
- §Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Xi Chen
- †Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093, Zurich, Switzerland
| | - Wei Cheng
- †Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093, Zurich, Switzerland
| | - Tongxiang Fan
- ‡State Key Laboratory of Metal Matrix Composites, Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Markus Niederberger
- †Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093, Zurich, Switzerland
| |
Collapse
|
457
|
Lee B, Lee S, Lee M, Jeong DH, Baek Y, Yoon J, Kim YH. Carbon nanotube-bonded graphene hybrid aerogels and their application to water purification. NANOSCALE 2015; 7:6782-6789. [PMID: 25807182 DOI: 10.1039/c5nr01018g] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present carbon nanotube (CNT)-bonded graphene hybrid aerogels that are prepared by growing CNTs on a graphene aerogel surface with nickel catalyst. The presence of bonded CNTs in the graphene aerogel results in vastly improved mechanical and electrical properties. A significant increase in specific surface area is also realized. The presence of the CNTs transforms the hybrid aerogels into a mesoporous material. The viscoelasticity of the hybrid aerogels is found to be invariant with respect to temperature over a range of between -150 °C and 450 °C. These characteristics along with the improved properties make the hybrid aerogels an entirely different class of material with applications in the fields of biotechnology and electrochemistry. The mesoporous nature of the material along with its high specific surface area also makes the hybrid aerogel attractive for application in water treatment. Both anionic and cationic dyes can be effectively removed from water by the hybrid aerogel. A number of organics and oils can be selectively separated from water by the hybrid aerogel. The hybrid aerogel is easy to handle and separate from water due to its magnetic nature, and can readily be recycled and reused.
Collapse
Affiliation(s)
- Byeongho Lee
- School of Mechanical and Aerospace Engineering, Seoul National University, Daehak-dong, Gwanak-gu, Seoul, 151-742, Republic of Korea.
| | | | | | | | | | | | | |
Collapse
|
458
|
Ha H, Shanmuganathan K, Ellison CJ. Mechanically stable thermally crosslinked poly(acrylic acid)/reduced graphene oxide aerogels. ACS APPLIED MATERIALS & INTERFACES 2015; 7:6220-9. [PMID: 25714662 DOI: 10.1021/acsami.5b00407] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Graphene oxide (GO) aerogels, high porosity (>99%) low density (∼3-10 mg cm(-3)) porous materials with GO pore walls, are particularly attractive due to their lightweight, high surface area, and potential use in environmental remediation, superhydrophobic and superoleophilic materials, energy storage, etc. However, pure GO aerogels are generally weak and delicate which complicates their handling and potentially limits their commercial implementation. The focus of this work was to synthesize highly elastic, mechanically stable aerogels that are robust and easy to handle without substantially sacrificing their high porosity or low density. To overcome this challenge, a small amount of readily available and thermally cross-linkable poly(acrylic acid) (PAA) was intermixed with GO to enhance the mechanical integrity of the aerogel without disrupting other desirable characteristic properties. This method is a simple straightforward procedure that does not include multistep or complicated chemical reactions, and it produces aerogels with mass densities of about 4-6 mg cm(-3) and >99.6% porosity that can reversibly support up to 10,000 times their weight with full recovery of their original volume. Finally, pressure sensing capabilities were demonstrated and their oil absorption capacities were measured to be around 120 g oil per g aerogel(-1) which highlights their potential use in practical applications.
Collapse
Affiliation(s)
- Heonjoo Ha
- †McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Kadhiravan Shanmuganathan
- ‡Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune, Maharashtra 411008, India
| | - Christopher J Ellison
- †McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| |
Collapse
|
459
|
Chen L, Du R, Zhu J, Mao Y, Xue C, Zhang N, Hou Y, Zhang J, Yi T. Three-dimensional nitrogen-doped graphene nanoribbons aerogel as a highly efficient catalyst for the oxygen reduction reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:1423-9. [PMID: 25367785 DOI: 10.1002/smll.201402472] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 09/15/2014] [Indexed: 05/06/2023]
Abstract
A highly conductive, ultralight, neat and versatile nitrogen-doped GNRs aerogel has been fabricated by a new hydrothermal method for the first time. The newly developed aerogel shows a very promising performance when used as a novel ORR catalyst in both alkaline and acidic solutions.
Collapse
Affiliation(s)
- Liang Chen
- Department of Chemistry and Concerted, Innovation Center of Chemistry for Energy Materials, Fudan University, 220 Handan Road, Shanghai, 200433, P.R. China
| | | | | | | | | | | | | | | | | |
Collapse
|
460
|
Nguyen DD, Suzuki S, Kato S, To BD, Hsu CC, Murata H, Rokuta E, Tai NH, Yoshimura M. Macroscopic, freestanding, and tubular graphene architectures fabricated via thermal annealing. ACS NANO 2015; 9:3206-3214. [PMID: 25738973 DOI: 10.1021/acsnano.5b00292] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Manipulation of individual graphene sheets/films into specific architectures at macroscopic scales is crucially important for practical uses of graphene. We present herein a versatile and robust method based on annealing of solid carbon precursors on nickel templates and thermo-assisted removal of poly(methyl methacrylate) under low vacuum of ∼0.6 Pa for fabrication of macroscopic, freestanding, and tubular graphene (TG) architectures. Specifically, the TG architectures can be obtained as individual and woven tubes with a diameter of ∼50 μm, a wall thickness in the range of 2.1-2.9 nm, a density of ∼1.53 mg·cm(-3), a thermal stability up to 600 °C in air, an electrical conductivity of ∼1.48 × 10(6) S·m(-1), and field emission current densities on the order of 10(4) A·cm(-2) at low applied electrical fields of 0.6-0.7 V·μm(-1). These properties show great promise for applications in flexible and lightweight electronics, electron guns, or X-ray tube sources.
Collapse
Affiliation(s)
- Duc Dung Nguyen
- †Toyota Technological Institute, 2-12-1 Hisakata, Tempaku, Nagoya 468-8511, Japan
| | - Seiya Suzuki
- †Toyota Technological Institute, 2-12-1 Hisakata, Tempaku, Nagoya 468-8511, Japan
| | - Shuji Kato
- ‡Faculty of Science and Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku, Nagoya 468-8502, Japan
| | - Bao Dong To
- §Department of Physics, National Chung Cheng University, Min Hsiung, Chiayi 621, Taiwan
| | - Chia Chen Hsu
- §Department of Physics, National Chung Cheng University, Min Hsiung, Chiayi 621, Taiwan
| | - Hidekazu Murata
- ‡Faculty of Science and Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku, Nagoya 468-8502, Japan
| | - Eiji Rokuta
- ‡Faculty of Science and Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku, Nagoya 468-8502, Japan
| | - Nyan-Hwa Tai
- ∥Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu 30013, Taiwan
| | - Masamichi Yoshimura
- †Toyota Technological Institute, 2-12-1 Hisakata, Tempaku, Nagoya 468-8511, Japan
| |
Collapse
|
461
|
Ferrari AC, Bonaccorso F, Fal'ko V, Novoselov KS, Roche S, Bøggild P, Borini S, Koppens FHL, Palermo V, Pugno N, Garrido JA, Sordan R, Bianco A, Ballerini L, Prato M, Lidorikis E, Kivioja J, Marinelli C, Ryhänen T, Morpurgo A, Coleman JN, Nicolosi V, Colombo L, Fert A, Garcia-Hernandez M, Bachtold A, Schneider GF, Guinea F, Dekker C, Barbone M, Sun Z, Galiotis C, Grigorenko AN, Konstantatos G, Kis A, Katsnelson M, Vandersypen L, Loiseau A, Morandi V, Neumaier D, Treossi E, Pellegrini V, Polini M, Tredicucci A, Williams GM, Hong BH, Ahn JH, Kim JM, Zirath H, van Wees BJ, van der Zant H, Occhipinti L, Di Matteo A, Kinloch IA, Seyller T, Quesnel E, Feng X, Teo K, Rupesinghe N, Hakonen P, Neil SRT, Tannock Q, Löfwander T, Kinaret J. Science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems. NANOSCALE 2015; 7:4598-810. [PMID: 25707682 DOI: 10.1039/c4nr01600a] [Citation(s) in RCA: 991] [Impact Index Per Article: 110.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We present the science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems, targeting an evolution in technology, that might lead to impacts and benefits reaching into most areas of society. This roadmap was developed within the framework of the European Graphene Flagship and outlines the main targets and research areas as best understood at the start of this ambitious project. We provide an overview of the key aspects of graphene and related materials (GRMs), ranging from fundamental research challenges to a variety of applications in a large number of sectors, highlighting the steps necessary to take GRMs from a state of raw potential to a point where they might revolutionize multiple industries. We also define an extensive list of acronyms in an effort to standardize the nomenclature in this emerging field.
Collapse
Affiliation(s)
- Andrea C Ferrari
- Cambridge Graphene Centre, University of Cambridge, Cambridge, CB3 0FA, UK.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
462
|
Zhang C, Liu DH, Lv W, Wang DW, Wei W, Zhou GM, Wang S, Li F, Li BH, Kang F, Yang QH. A high-density graphene-sulfur assembly: a promising cathode for compact Li-S batteries. NANOSCALE 2015; 7:5592-7. [PMID: 25626595 DOI: 10.1039/c4nr06863g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This work reports a high-density graphene/sulfur assembly for compact Li-S batteries with high volumetric capacity, which retains good structural stability and conductivity. This dense assembly was prepared by a reduction-triggered self-assembly of graphene oxide with simultaneous deposition of sulfur, followed by unique evaporation-induced spatial volume shrinkage. This assembly has an ultrahigh density, delivering an unprecedented volumetric capacity that is much higher than common carbon/sulfur cathodes. In particular, the unique spatial confinement derived from the shrinkage of the graphene/sulfur assembly is favorable for stabilizing sulfur cathodes.
Collapse
Affiliation(s)
- Chen Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
463
|
García-Tuñon E, Barg S, Franco J, Bell R, Eslava S, D'Elia E, Maher RC, Guitian F, Saiz E. Printing in three dimensions with graphene. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:1688-93. [PMID: 25605024 DOI: 10.1002/adma.201405046] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/03/2014] [Indexed: 05/16/2023]
Abstract
Responsive graphene oxide sheets form non-covalent networks with optimum rheological properties for 3D printing. These networks have shear thinning behavior and sufficiently high elastic shear modulus (G') to build self-supporting 3D structures by direct write assembly. Drying and thermal reduction leads to ultra-light graphene-only structures with restored conductivity and elastomeric behavior.
Collapse
Affiliation(s)
- Esther García-Tuñon
- Centre for Advanced Structural Ceramics, Department of Materials, Imperial College London, London, SW7 2BP, UK
| | | | | | | | | | | | | | | | | |
Collapse
|
464
|
Wang Z, Shen X, Akbari Garakani M, Lin X, Wu Y, Liu X, Sun X, Kim JK. Graphene aerogel/epoxy composites with exceptional anisotropic structure and properties. ACS APPLIED MATERIALS & INTERFACES 2015; 7:5538-49. [PMID: 25691257 DOI: 10.1021/acsami.5b00146] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
3D interconnected graphene aerogels (GAs) are prepared through one-step chemical reduction and rational assembly of graphene oxide (GO) sheets, so that the difficulties to uniformly disperse the individual graphene sheets in the polymer matrixes are avoided. Apart from ultralow density, high porosity, high electrical conductivity, and excellent compressibility, the resulting GAs possess a cellular architecture with a high degree of alignment when the graphene content is above a threshold, ∼0.5 wt %. The composites prepared by infiltrating GA with epoxy resin present excellent electrical conductivities, together with high mechanical properties and fracture toughness. The unusual anisotropic structure gives rise to ∼67% and ∼113% higher electrical conductivity and fracture toughness of the composites, respectively, in the alignment direction than that transverse to it.
Collapse
Affiliation(s)
- Zhenyu Wang
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong
| | | | | | | | | | | | | | | |
Collapse
|
465
|
Gao H, Duan H. 2D and 3D graphene materials: Preparation and bioelectrochemical applications. Biosens Bioelectron 2015; 65:404-19. [DOI: 10.1016/j.bios.2014.10.067] [Citation(s) in RCA: 148] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 10/27/2014] [Accepted: 10/29/2014] [Indexed: 11/27/2022]
|
466
|
Lv W, Zhang C, Li Z, Yang QH. Self-Assembled 3D Graphene Monolith from Solution. J Phys Chem Lett 2015; 6:658-668. [PMID: 26262482 DOI: 10.1021/jz502655m] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Three-dimensional (3D) graphene-assembled monoliths (GAs), especially ones prepared by self-assembly in the liquid phase, represent promising forms to realize the practical applications of graphene due to their high surface utilization and operability. However, the understanding of the assembly process and structure control of 3D GAs, as a new class of carbon materials, is quite inadequate. In this Perspective, we give a demonstration of the assembly process and discuss the key factors involved in the structure control of 3D GAs to pave the way for their future applications. It is shown that the assembly process starts with the phase separation, which is responsible for the formation of the 3D networked structure and liquid phase as the spacers avoid the parallel overlap of graphene layers and help form an interlinked pore system. Well-tailored graphene sheets and selected assembly media must be a precondition for a well-controlled assembly process and microstructure of a 3D GA. The potential applications in energy storage featuring high rate and high volumetric energy density demonstrate advantages of 3D GAs in real applications.
Collapse
Affiliation(s)
- Wei Lv
- †Shenzhen Key Laboratory for Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - Chen Zhang
- ‡Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- §Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Zhengjie Li
- ‡Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- §Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Quan-Hong Yang
- †Shenzhen Key Laboratory for Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
- ‡Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- §Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| |
Collapse
|
467
|
Sui ZY, Meng YN, Xiao PW, Zhao ZQ, Wei ZX, Han BH. Nitrogen-doped graphene aerogels as efficient supercapacitor electrodes and gas adsorbents. ACS APPLIED MATERIALS & INTERFACES 2015; 7:1431-1438. [PMID: 25545306 DOI: 10.1021/am5042065] [Citation(s) in RCA: 159] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nitrogen-doped graphene has been demonstrated to be an excellent multifunctional material due to its intriguing features such as outstanding electrocatalytic activity, high electrical conductivity, and good chemical stability as well as wettability. However, synthesizing the nitrogen-doped graphene with a high nitrogen content and large specific surface area is still a challenge. In this study, we prepared a nitrogen-doped graphene aerogel (NGA) with high porosity by means of a simple hydrothermal reaction, in which graphene oxide and ammonia are adopted as carbon and nitrogen source, respectively. The microstructure, morphology, porous properties, and chemical composition of NGA were well-disclosed by a variety of characterization methods, such as scanning electron microscopy, nitrogen adsorption-desorption measurements, X-ray photoelectron spectroscopy, and Raman spectroscopy. The as-made NGA displays a large Brunauer-Emmett-Teller specific surface area (830 m(2) g(-1)), high nitrogen content (8.4 atom %), and excellent electrical conductivity and wettability. On the basis of these features, the as-made NGA shows superior capacitive behavior (223 F g(-1) at 0.2 A g(-1)) and long-term cycling performance in 1.0 mol L(-1) H2SO4 electrolyte. Furthermore, the NGA also possesses a high carbon dioxide uptake capacity at 1.0 bar and 273 K (11.3 wt %).
Collapse
Affiliation(s)
- Zhu-Yin Sui
- National Center for Nanoscience and Technology , Beijing 100190, China
| | | | | | | | | | | |
Collapse
|
468
|
Zhang X, Ziemer KS, Zhang K, Ramirez D, Li L, Wang S, Hope-Weeks LJ, Weeks BL. Large-area preparation of high-quality and uniform three-dimensional graphene networks through thermal degradation of graphene oxide-nitrocellulose composites. ACS APPLIED MATERIALS & INTERFACES 2015; 7:1057-1064. [PMID: 25526102 DOI: 10.1021/am508909h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrate a simple method to prepare high-quality and uniform three-dimensional (3D) graphene networks through thermal degradation of graphene oxide (GO)-nitrocellulose composites over a large area. The nitrocellulose simultaneously acts as a support and aids in the reduction of GO by exothermic decomposition. The graphene networks have tunable porous morphology where the pore size can be controlled by adjusting the concentration of GO in the composite. This new technique is a very simple method to obtain 3D graphene networks and has the potential to produce 3D graphene-modified substrates for use in energy storage and conversion applications, in supporting frameworks of catalyst, and in sensors. In this report, the prepared 3D graphene networks were directly used as the electrodes of supercapacitors without using a binding agent and/or conducting additive with a high specific capacitance of 162.5 F g(-1) at 0.5 A g(-1) current density.
Collapse
Affiliation(s)
- Xin Zhang
- Department of Chemical Engineering, ‡Department of Chemistry & Biochemistry, and §Nanomaterials and Nanomanufacturing Laboratory, Department of Industrial Engineering, Texas Tech University , Lubbock, Texas 79409, United States
| | | | | | | | | | | | | | | |
Collapse
|
469
|
Wu Y, Yi N, Huang L, Zhang T, Fang S, Chang H, Li N, Oh J, Lee JA, Kozlov M, Chipara AC, Terrones H, Xiao P, Long G, Huang Y, Zhang F, Zhang L, Lepró X, Haines C, Lima MD, Lopez NP, Rajukumar LP, Elias AL, Feng S, Kim SJ, Narayanan NT, Ajayan PM, Terrones M, Aliev A, Chu P, Zhang Z, Baughman RH, Chen Y. Three-dimensionally bonded spongy graphene material with super compressive elasticity and near-zero Poisson’s ratio. Nat Commun 2015; 6:6141. [DOI: 10.1038/ncomms7141] [Citation(s) in RCA: 413] [Impact Index Per Article: 45.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 12/16/2014] [Indexed: 12/21/2022] Open
|
470
|
Wang X, Lu LL, Yu ZL, Xu XW, Zheng YR, Yu SH. Scalable Template Synthesis of Resorcinol-Formaldehyde/Graphene Oxide Composite Aerogels with Tunable Densities and Mechanical Properties. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410668] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
471
|
Wang X, Lu LL, Yu ZL, Xu XW, Zheng YR, Yu SH. Scalable Template Synthesis of Resorcinol-Formaldehyde/Graphene Oxide Composite Aerogels with Tunable Densities and Mechanical Properties. Angew Chem Int Ed Engl 2015; 54:2397-401. [DOI: 10.1002/anie.201410668] [Citation(s) in RCA: 146] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Revised: 12/02/2014] [Indexed: 11/12/2022]
|
472
|
He T, Li Z, Sun Z, Chen S, Shen R, Yi L, Deng L, Yang M, Liu H, Zhang Y. From supramolecular hydrogels to functional aerogels: a facile strategy to fabricate Fe3O4/N-doped graphene composites. RSC Adv 2015. [DOI: 10.1039/c5ra15595a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The Fe3O4/N-GAs directly derived from Fc-F/GO supramolecular hydrogels act as multifunctional reagents, including Fe/N sources and the dispersant of GO.
Collapse
Affiliation(s)
- Ting He
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Zhengyuan Li
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Zhifang Sun
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Shuzhen Chen
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Rujuan Shen
- State Key Laboratory of Power Metallurgy
- Central South University
- Changsha 410083
- China
| | - Lunzhao Yi
- Yunnan Food Safety Research Institute
- Kunming University of Science and Technology
- Kunming
- China
| | - Liu Deng
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Minghui Yang
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Hongtao Liu
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Yi Zhang
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| |
Collapse
|
473
|
Fan W, Miao YE, Huang Y, Tjiu WW, Liu T. Flexible free-standing 3D porous N-doped graphene–carbon nanotube hybrid paper for high-performance supercapacitors. RSC Adv 2015. [DOI: 10.1039/c4ra13675f] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Free-standing 3D porous N-doped graphene–CNT hybrid paper has been synthesized, which can be used as flexible electrodes for high-performance supercapacitors.
Collapse
Affiliation(s)
- Wei Fan
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| | - Yue-E Miao
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| | - Yunpeng Huang
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| | - Weng Weei Tjiu
- Institute of Materials Research and Engineering
- A*STAR (Agency for Science, Technology and Research)
- Singapore 117602
- Singapore
| | - Tianxi Liu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| |
Collapse
|
474
|
Wang Z, Tang Z, Han Z, Shen S, Zhao B, Yang J. Effect of drying conditions on the structure of three-dimensional N-doped graphene and its electrochemical performance. RSC Adv 2015. [DOI: 10.1039/c4ra15494k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The effect of drying conditions on the structure of graphene based 3D materials is discussed in the manuscript.
Collapse
Affiliation(s)
- Zhao Wang
- School of Materials Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai 200093
- China
- School of Environmental Science and Engineering
| | - Zhihong Tang
- School of Materials Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai 200093
- China
| | - Zhuo Han
- School of Materials Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai 200093
- China
| | - Shuling Shen
- School of Materials Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai 200093
- China
| | - Bin Zhao
- School of Materials Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai 200093
- China
| | - Junhe Yang
- School of Materials Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai 200093
- China
| |
Collapse
|
475
|
Cox BJ, Baowan D, Bacsa W, Hill JM. Relating elasticity and graphene folding conformation. RSC Adv 2015. [DOI: 10.1039/c5ra08276e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Variational calculus is employed to determine the folding behaviour of a single graphene sheet.
Collapse
Affiliation(s)
- Barry J. Cox
- Nanomechanics Group
- School of Mathematical Sciences
- The University of Adelaide
- Australia
| | - Duangkamon Baowan
- Department of Mathematics
- Faculty of Science
- Mahidol University
- Centre of Excellence in Mathematics
- Bangkok 10400
| | - Wolfgang Bacsa
- CEMES-CNRS and University of Toulouse
- 31055 Toulouse
- France
| | - James M. Hill
- School of Information Technology and Mathematical Sciences
- University of South Australia
- Mawson Lakes
- Australia
| |
Collapse
|
476
|
Liu L, Zhai J, Zhu C, Gao Y, Wang Y, Han Y, Dong S. One-pot synthesis of 3-dimensional reduced graphene oxide-based hydrogel as support for microbe immobilization and BOD biosensor preparation. Biosens Bioelectron 2015; 63:483-489. [DOI: 10.1016/j.bios.2014.07.074] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 07/21/2014] [Accepted: 07/23/2014] [Indexed: 11/28/2022]
|
477
|
Xiong X, Ji N, Song C, Liu Q. Preparation Functionalized Graphene Aerogels as Air Cleaner Filter. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.proeng.2015.09.062] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
478
|
Ge X, Yang W, Wang J, Long D, Ling L, Qiao W. Flexible carbon nanofiber sponges for highly efficient and recyclable oil absorption. RSC Adv 2015. [DOI: 10.1039/c5ra09021k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Carbon nanofiber sponges composed of three-dimensional networks have been prepared though chemical vapor deposition. Such sponges exhibit controllable bulk density, admirable mechanical flexibility and high oil absorption capacity.
Collapse
Affiliation(s)
- Xiang Ge
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Wei Yang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Jitong Wang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Donghui Long
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Licheng Ling
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Wenming Qiao
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
- National Engineering Research Center of Ultrafine Powder
| |
Collapse
|
479
|
Zhang L, Wu J, Zhang X, Gong G, Liu J, Guo L. Multifunctional, marvelous polyimide aerogels as highly efficient and recyclable sorbents. RSC Adv 2015. [DOI: 10.1039/c4ra15115a] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel polyimide aerogels with high absorption capacity and excellent recyclability for oils and organic liquids are fabricated by freeze-drying.
Collapse
Affiliation(s)
- Li Zhang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Juntao Wu
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Xiaomin Zhang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Guangming Gong
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Jingang Liu
- Laboratory of Advanced Polymer Materials
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
| | - Lin Guo
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| |
Collapse
|
480
|
Dong Y, Liu S, Wang Z, Liu Y, Zhao Z, Qiu J. Compressible graphene aerogel supported CoO nanostructures as a binder-free electrode for high-performance lithium-ion batteries. RSC Adv 2015. [DOI: 10.1039/c4ra14519d] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Binder-free electrodes have been synthesized by coupling compressible graphene aerogels with CoO nanostructures, which exhibit superior electrochemical performance to conventional electrodes made of powders and binders in lithium-ion batteries.
Collapse
Affiliation(s)
- Yanfeng Dong
- Carbon Research Laboratory
- Liaoning Key Lab for Energy Materials and Chemical Engineering
- State Key Lab of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
| | - Shaohong Liu
- Carbon Research Laboratory
- Liaoning Key Lab for Energy Materials and Chemical Engineering
- State Key Lab of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
| | - Zhiyu Wang
- Carbon Research Laboratory
- Liaoning Key Lab for Energy Materials and Chemical Engineering
- State Key Lab of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
| | - Yang Liu
- Carbon Research Laboratory
- Liaoning Key Lab for Energy Materials and Chemical Engineering
- State Key Lab of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
| | - Zongbin Zhao
- Carbon Research Laboratory
- Liaoning Key Lab for Energy Materials and Chemical Engineering
- State Key Lab of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
| | - Jieshan Qiu
- Carbon Research Laboratory
- Liaoning Key Lab for Energy Materials and Chemical Engineering
- State Key Lab of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
| |
Collapse
|
481
|
Zhang Y, Fan W, Huang Y, Zhang C, Liu T. Graphene/carbon aerogels derived from graphene crosslinked polyimide as electrode materials for supercapacitors. RSC Adv 2015. [DOI: 10.1039/c4ra13015d] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Graphene/carbon aerogels with hierarchical pores have been facilely prepared by carbonization of graphene/polyimide aerogels.
Collapse
Affiliation(s)
- Youfang Zhang
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| | - Wei Fan
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| | - Yunpeng Huang
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| | - Chao Zhang
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| | - Tianxi Liu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| |
Collapse
|
482
|
Kuang J, Dai Z, Liu L, Yang Z, Jin M, Zhang Z. Synergistic effects from graphene and carbon nanotubes endow ordered hierarchical structure foams with a combination of compressibility, super-elasticity and stability and potential application as pressure sensors. NANOSCALE 2015; 7:9252-60. [PMID: 25932597 DOI: 10.1039/c5nr00841g] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Nanostructured carbon material based three-dimensional porous architectures have been increasingly developed for various applications, e.g. sensors, elastomer conductors, and energy storage devices. Maintaining architectures with good mechanical performance, including elasticity, load-bearing capacity, fatigue resistance and mechanical stability, is prerequisite for realizing these functions. Though graphene and CNT offer opportunities as nanoscale building blocks, it still remains a great challenge to achieve good mechanical performance in their microarchitectures because of the need to precisely control the structure at different scales. Herein, we fabricate a hierarchical honeycomb-like structured hybrid foam based on both graphene and CNT. The resulting materials possess excellent properties of combined high specific strength, elasticity and mechanical stability, which cannot be achieved in neat CNT and graphene foams. The improved mechanical properties are attributed to the synergistic-effect-induced highly organized, multi-scaled hierarchical architectures. Moreover, with their excellent electrical conductivity, we demonstrated that the hybrid foams could be used as pressure sensors in the fields related to artificial skin.
Collapse
Affiliation(s)
- Jun Kuang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, China.
| | | | | | | | | | | |
Collapse
|
483
|
Sultanov F, Mansurov Z. About aerogels based on carbon nanomaterials. CHEMICAL BULLETIN OF KAZAKH NATIONAL UNIVERSITY 2014. [DOI: 10.15328/chemb_2014_467-82] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
|
484
|
Ma Y, Chen Y. Three-dimensional graphene networks: synthesis, properties and applications. Natl Sci Rev 2014. [DOI: 10.1093/nsr/nwu072] [Citation(s) in RCA: 237] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Recently, three-dimensional graphene/graphene oxide (GO) networks (3DGNs) in the form of foams, sponges and aerogels have attracted much attention. 3D structures provide graphene materials with high specific surface areas, large pore volumes, strong mechanical strengths and fast mass and electron transport, owing to the combination of the 3D porous structures and the excellent intrinsic properties of graphene. This review focuses on the latest advances in the preparation, properties and potential applications of 3D micro-/nano-architectures made of graphene/GO-based networks, with emphasis on graphene foams and sponges.
Collapse
Affiliation(s)
- Yanfeng Ma
- Key Laboratory of Functional Polymer Materials and the Centre of Nanoscale, Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yongsheng Chen
- Key Laboratory of Functional Polymer Materials and the Centre of Nanoscale, Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| |
Collapse
|
485
|
Zhou W, Zhou K, Hou D, Liu X, Li G, Sang Y, Liu H, Li L, Chen S. Three-dimensional hierarchical frameworks based on MoS₂ nanosheets self-assembled on graphene oxide for efficient electrocatalytic hydrogen evolution. ACS APPLIED MATERIALS & INTERFACES 2014; 6:21534-40. [PMID: 25347618 DOI: 10.1021/am506545g] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Advanced materials for electrocatalytic water splitting are central to renewable energy research. In this work, three-dimensional (3D) hierarchical frameworks based on the self-assembly of MoS2 nanosheets on graphene oxide were produced via a simple one-step hydrothermal process. The structures of the resulting 3D frameworks were characterized by using a variety of microscopic and spectroscopic tools, including scanning and transmission electron microscopies, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman scattering. Importantly, the three-dimensional MoS2/graphene frameworks might be used directly as working electrodes which exhibited apparent and stable electrocatalytic activity in hydrogen evolution reaction (HER), as manifested by a large cathodic current density with a small overpotential of -107 mV (-121 mV when loaded on a glassy-carbon electrode) and a Tafel slope of 86.3 mV/dec (46.3 mV/dec when loaded on a glassy-carbon electrode). The remarkable performance might be ascribed to the good mechanical strength and high electrical conductivity of the 3D frameworks for fast charge transport and collection, where graphene oxide provided abundant nucleation sites for MoS2 deposition and oxygen incorporation led to the formation of defect-rich MoS2 nanosheets with active sites for HER.
Collapse
Affiliation(s)
- Weijia Zhou
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou, Guangdong 510006, China
| | | | | | | | | | | | | | | | | |
Collapse
|
486
|
Wu C, Fang L, Huang X, Jiang P. Three-dimensional highly conductive graphene-silver nanowire hybrid foams for flexible and stretchable conductors. ACS APPLIED MATERIALS & INTERFACES 2014; 6:21026-21034. [PMID: 25376385 DOI: 10.1021/am505908d] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Graphene foams have showed huge application potentials owing to their unique 3D structure and superior properties. Thus, it is highly desired to develop a simple and effective pathway to fabricate high performance graphene-based foams. Here, we present a polymer template-assisted assembly strategy for fabricating a novel class of graphene/AgNW hybrid foams. The hybrid foams show 3D ordered microstructures, high thermal stability, and excellent electrical and mechanical properties, and demonstrate huge application potential in the fields of flexible and stretchable conductors. Importantly, the polymer-template assisted assembly technique is simple, scalable, and low-cost, providing a new synthesis protocol for various multifunctional graphene hybrid foam-based composites.
Collapse
Affiliation(s)
- Chao Wu
- Department of Polymer Science and Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai 200240, P. R. China
| | | | | | | |
Collapse
|
487
|
Enhancing lithium–sulphur battery performance by strongly binding the discharge products on amino-functionalized reduced graphene oxide. Nat Commun 2014. [DOI: 10.1038/ncomms6002 (2014)] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
|
488
|
Sanjeeva Rao K, Senthilnathan J, Ting JM, Yoshimura M. Continuous production of nitrogen-functionalized graphene nanosheets for catalysis applications. NANOSCALE 2014; 6:12758-12768. [PMID: 25219381 DOI: 10.1039/c4nr02824d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study reports the "continuous production" of high-quality, few-layer nitrogen-functionalized graphene nanosheets in aqueous solutions directly from graphite via a two-step method. The initial step utilizes our recently developed peroxide-mediated soft and green electrochemical exfoliation approach for the production of few-layer graphene nanosheets. The subsequent step, developed here, produces nitrogen-functionalized graphene nanosheets via selective alkylation/basic hydrolysis reactions using rather a simple nitrogen precursor bromoacetonitrile, which was never reported in the literature. A possible reaction mechanism of the nitrogen-functionalized graphene formation is proposed. The proposed method allows the quantification of the phenolic and hydroxyl functional groups of anodic few-layer graphene via the derivatization chemistry approach. Additionally, a nitrogen-functionalized graphene-gold nanocrystal hybrid is prepared using gold nanocrystals obtained via the microwave irradiation of H[AuCl4] and trisodium citrate solution. A systematic investigation demonstrates that the nitrogen-functionalized graphene-gold nanocrystal hybrid shows enhanced catalytic reduction of carbonyl compounds such as benzaldehyde.
Collapse
Affiliation(s)
- Kodepelly Sanjeeva Rao
- Promotion Center for Global Materials Research (PCGMR), Department of Material Science and Engineering, National Cheng Kung University, Tainan, Taiwan.
| | | | | | | |
Collapse
|
489
|
Pham TN, Samikannu A, Kukkola J, Rautio AR, Pitkänen O, Dombovari A, Lorite GS, Sipola T, Toth G, Mohl M, Mikkola JP, Kordas K. Industrially benign super-compressible piezoresistive carbon foams with predefined wetting properties: from environmental to electrical applications. Sci Rep 2014; 4:6933. [PMID: 25375221 PMCID: PMC5381471 DOI: 10.1038/srep06933] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 10/17/2014] [Indexed: 11/15/2022] Open
Abstract
In the present work electrically conductive, flexible, lightweight carbon sponge materials derived from open-pore structure melamine foams are studied and explored. Hydrophobic and hydrophilic surface properties - depending on the chosen treatment conditions - allow the separation and storage of liquid chemical compounds. Activation of the carbonaceous structures substantially increases the specific surface area from ~4 m2g−1 to ~345 m2g−1, while retaining the original three-dimensional, open-pore structure suitable for hosting, for example, Ni catalyst nanoparticles. In turn the structure is rendered suitable for hydrogenating acetone to 2-propanol and methyl isobutyl ketone as well for growing hierarchical carbon nanotube structures used as electric double-layer capacitor electrodes with specific capacitance of ~40 F/g. Mechanical stress-strain analysis indicates the materials are super-compressible (>70% volume reduction) and viscoelastic with excellent damping behavior (loss of 0.69 ± 0.07), while piezoresistive measurements show very high gauge factors (from ~20 to 50) over a large range of deformations. The cost-effective, robust and scalable synthesis - in conjunction with their fascinating multifunctional utility - makes the demonstrated carbon foams remarkable competitors with other three-dimensional carbon materials typically based on pyrolyzed biopolymers or on covalently bonded graphene and carbon nanotube frameworks.
Collapse
Affiliation(s)
- Tung Ngoc Pham
- Technical Chemistry, Department of Chemistry, Chemical-Biological Centre, Umeå University, SE-90187 Umeå, Sweden
| | - Ajaikumar Samikannu
- Technical Chemistry, Department of Chemistry, Chemical-Biological Centre, Umeå University, SE-90187 Umeå, Sweden
| | - Jarmo Kukkola
- Microelectronics and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
| | - Anne-Riikka Rautio
- Microelectronics and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
| | - Olli Pitkänen
- Microelectronics and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
| | - Aron Dombovari
- Microelectronics and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
| | - Gabriela Simone Lorite
- Microelectronics and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
| | - Teemu Sipola
- Microelectronics and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
| | - Geza Toth
- Microelectronics and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
| | - Melinda Mohl
- Microelectronics and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
| | - Jyri-Pekka Mikkola
- 1] Technical Chemistry, Department of Chemistry, Chemical-Biological Centre, Umeå University, SE-90187 Umeå, Sweden [2] Industrial Chemistry &Reaction Engineering, Department of Chemical Engineering, Process Chemistry Centre, Åbo Akademi University, FI-20500, Åbo-Turku, Finland
| | - Krisztian Kordas
- Microelectronics and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
| |
Collapse
|
490
|
Zhao N, Wang Z, Cai C, Shen H, Liang F, Wang D, Wang C, Zhu T, Guo J, Wang Y, Liu X, Duan C, Wang H, Mao Y, Jia X, Dong H, Zhang X, Xu J. Bioinspired materials: from low to high dimensional structure. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:6994-7017. [PMID: 25212698 DOI: 10.1002/adma.201401718] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/11/2014] [Indexed: 06/03/2023]
Abstract
The surprising properties of biomaterials are the results of billions of years of evolution. Generally, biomaterials are assembled under mild conditions with very limited supply of constituents available for living organism, and their amazing properties largely result from the sophisticated hierarchical structures. Following the biomimetic principles to prepare manmade materials has drawn great research interests in materials science and engineering. In this review, we summarize the recent progress in fabricating bioinspired materials with the emphasis on mimicking the structure from one to three dimensions. Selected examples are described with a focus on the relationship between the structural characters and the corresponding functions. For one-dimensional materials, spider fibers, polar bear hair, multichannel plant roots and so on have been involved. Natural structure color and color shifting surfaces, and the antifouling, antireflective coatings of biomaterials are chosen as the typical examples of the two-dimensional biomimicking. The outstanding protection performance, and the stimuli responsive and self-healing functions of biomaterials based on the sophisticated hierarchical bulk structures are the emphases of the three-dimensional mimicking. Finally, a summary and outlook are given.
Collapse
Affiliation(s)
- Ning Zhao
- Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing, 100190, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
491
|
Hu K, Kulkarni DD, Choi I, Tsukruk VV. Graphene-polymer nanocomposites for structural and functional applications. Prog Polym Sci 2014. [DOI: 10.1016/j.progpolymsci.2014.03.001] [Citation(s) in RCA: 815] [Impact Index Per Article: 81.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
492
|
Fang H, Yu C, Ma T, Qiu J. Boron-doped graphene as a high-efficiency counter electrode for dye-sensitized solar cells. Chem Commun (Camb) 2014; 50:3328-30. [PMID: 24535331 DOI: 10.1039/c3cc48258h] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Boron-doped graphene, synthesized by annealing a mixture of graphite oxide and B2O3, has shown a high conversion efficiency of 6.73% as a counter electrode (CE) for dye-sensitized solar cells, which is better than the Pt CE.
Collapse
Affiliation(s)
- Haiqiu Fang
- Carbon Research Laboratory, Liaoning Key Lab for Energy Materials and Chemical Engineering, State Key Lab of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
| | | | | | | |
Collapse
|
493
|
Enhancing lithium-sulphur battery performance by strongly binding the discharge products on amino-functionalized reduced graphene oxide. Nat Commun 2014; 5:5002. [PMID: 25255431 DOI: 10.1038/ncomms6002] [Citation(s) in RCA: 397] [Impact Index Per Article: 39.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 08/14/2014] [Indexed: 12/23/2022] Open
Abstract
Lithium-sulphur batteries are one very appealing power source with high energy density. But their practical use is still hindered by several issues including short lifespan, low efficiency and safety concern from the lithium anode. Polysulphide dissolution and insulating nature of sulphur are generally considered responsible for the capacity degradation. However, the detachment of discharge products, that is, highly polar lithium sulphides, from nonpolar carbon matrix (for example, graphene) has been rarely studied as one critical factor. Here we report the strongly covalent stabilization of sulphur and its discharge products on amino-functionalized reduced graphene oxide that enables stable capacity retention of 80% for 350 cycles with high capacities and excellent high-rate response up to 4 C. The present study demonstrates a feasible and effective strategy to solve the long-term cycling difficulty for lithium-sulphur batteries and also helps to understand the capacity decay mechanism involved.
Collapse
|
494
|
Tang C, Zhang Q, Zhao MQ, Huang JQ, Cheng XB, Tian GL, Peng HJ, Wei F. Nitrogen-doped aligned carbon nanotube/graphene sandwiches: facile catalytic growth on bifunctional natural catalysts and their applications as scaffolds for high-rate lithium-sulfur batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:6100-5. [PMID: 24862890 DOI: 10.1002/adma.201401243] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 04/12/2014] [Indexed: 05/06/2023]
Abstract
Nitrogen-doped aligned CNT/graphene sandwiches are rationally designed and in-situ fabricated by a facile catalytic growth on bifunctional natural catalysts that exhibit high-rate performances as scaffolds for lithium-sulfur batteries, with a high initial capacity of 1152 mA h g(-1) at 1.0 C. A remarkable capacity of 770 mA h g(-1) can be achieved at 5.0 C. Such a design strategy for materials opens up new perspectives to novel advanced functional composites, especially interface-modified hierarchical nanocarbons for broad applications.
Collapse
Affiliation(s)
- Cheng Tang
- Beijing Key Laboratory of Green Chemical, Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | | | | | | | | | | | | | | |
Collapse
|
495
|
Zhang Z, Wu P. A facile one-pot route towards three-dimensional graphene-based microporous N-doped carbon composites. RSC Adv 2014. [DOI: 10.1039/c4ra08945f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
496
|
Wu D, Yu Z, Wu W, Fang L, Zhu H. Continuous oil–water separation with surface modified sponge for cleanup of oil spills. RSC Adv 2014. [DOI: 10.1039/c4ra07583h] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
497
|
Graphene Nanoarchitectonics: Approaching the Excellent Properties of Graphene from Microscale to Macroscale. J Inorg Organomet Polym Mater 2014. [DOI: 10.1007/s10904-014-0073-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
498
|
Shao JJ, Lv W, Yang QH. Self-assembly of graphene oxide at interfaces. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:5586-612. [PMID: 24852899 DOI: 10.1002/adma.201400267] [Citation(s) in RCA: 161] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 04/04/2014] [Indexed: 05/26/2023]
Abstract
Due to its amphiphilic property, graphene oxide (GO) can achieve a variety of nanostructures with different morphologies (for example membranes, hydrogel, crumpled particles, hollow spheres, sack-cargo particles, Pickering emulsions, and so on) by self-assembly. The self-assembly is mostly derived from the self-concentration of GO sheets at various interfaces, including liquid-air, liquid-liquid and liquid-solid interfaces. This paper gives a comprehensive review of these assembly phenomena of GO at the three types of interfaces, the derived interfacial self-assembly techniques, and the as-obtained assembled materials and their properties. The interfacial self-assembly of GO, enabled by its fantastic features including the amphiphilicity, the negatively charged nature, abundant oxygen-containing groups and two-dimensional flexibility, is highlighted as an easy and well-controlled strategy for the design and preparation of functionalized carbon materials, and the use of self-assembly for uniform hybridization is addressed for preparing hybrid carbon materials with various functions. A number of new exciting and potential applications are also presented for the assembled GO-based materials. This contribution concludes with some personal perspectives on future challenges before interfacial self-assembly may become a major strategy for the application-targeted design and preparation of functionalized carbon materials.
Collapse
Affiliation(s)
- Jiao-Jing Shao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China; The Synergistic Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin, 300072, China
| | | | | |
Collapse
|
499
|
Cong HP, Chen JF, Yu SH. Graphene-based macroscopic assemblies and architectures: an emerging material system. Chem Soc Rev 2014; 43:7295-325. [PMID: 25065466 DOI: 10.1039/c4cs00181h] [Citation(s) in RCA: 211] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Due to the outstanding physicochemical properties arising from its truly two-dimensional (2D) planar structure with a single-atom thickness, graphene exhibits great potential for use in sensors, catalysts, electrodes, and in biological applications, etc. With further developments in the theoretical understanding and assembly techniques, graphene should enable great changes both in scientific research and practical industrial applications. By the look of development, it is of fundamental and practical significance to translate the novel physical and chemical properties of individual graphene nanosheets into the macroscale by the assembly of graphene building blocks into macroscopic architectures with structural specialities and functional novelties. The combined features of a 2D planar structure and abundant functional groups of graphene oxide (GO) should provide great possibilities for the assembly of GO nanosheets into macroscopic architectures with different macroscaled shapes through various assembly techniques under different bonding interactions. Moreover, macroscopic graphene frameworks can be used as ideal scaffolds for the incorporation of functional materials to offset the shortage of pure graphene in the specific desired functionality. The advantages of light weight, supra-flexibility, large surface area, tough mechanical strength, and high electrical conductivity guarantee graphene-based architectures wide application fields. This critical review mainly addresses recent advances in the design and fabrication of graphene-based macroscopic assemblies and architectures and their potential applications. Herein, we first provide overviews of the functional macroscopic graphene materials from three aspects, i.e., 1D graphene fibers/ribbons, 2D graphene films/papers, 3D network-structured graphene monoliths, and their composite counterparts with either polymers or nano-objects. Then, we present the promising potential applications of graphene-based macroscopic assemblies in the fields of electronic and optoelectronic devices, sensors, electrochemical energy devices, and in water treatment. Last, the personal conclusions and perspectives for this intriguing field are given.
Collapse
Affiliation(s)
- Huai-Ping Cong
- Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
| | | | | |
Collapse
|
500
|
Li Y, Chen J, Huang L, Li C, Hong JD, Shi G. Highly compressible macroporous graphene monoliths via an improved hydrothermal process. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:4789-93. [PMID: 24819855 DOI: 10.1002/adma.201400657] [Citation(s) in RCA: 160] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 03/28/2014] [Indexed: 05/16/2023]
Abstract
An improved hydrothermal process is developed to fabricate macroporous graphene monoliths (MGMs) using a soft template of organic droplets. The MGMs are constructed from closed-cell distorted spherical pores. This unique microstructure makes MGMs that have low weight densities, good electrical conductivities, and excellent elasticity with rapid recovery rates.
Collapse
Affiliation(s)
- Yingru Li
- Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | | | | | | | | | | |
Collapse
|