摘要 :
As a new 2D carbon material allotrope composed of sp and sp~2 carbon atoms, graphdiyne (GDY) possesses a highly conjugated porous structure, easily tunable intrinsic bandgap, and various excellent properties. Such properties allow...
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As a new 2D carbon material allotrope composed of sp and sp~2 carbon atoms, graphdiyne (GDY) possesses a highly conjugated porous structure, easily tunable intrinsic bandgap, and various excellent properties. Such properties allowed researchers to develop methods to prepare GDY, so that it can be applied for energy storage and conversion, environmental protection, various electronic devices and so on. In this review, the authors systematically discuss the methods and strategies developed for preparing GDY and its derivatives, including the synthesis of GDY by using liquid-, solid-, and gas-phase methods, the synthesis of heteroatomdoped GDY, the preparation of GDY-based composites, and the synthesis of GDY analogues. All these preparation methods can provide the way to obtain GDY for specific studies and applications.
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From manufacture to disposal, the interaction of graphdiyne based nanomaterials with living organisms is inevitable and crucial. However, the cytotoxic properties of this novel carbon nanomaterial are rarely investigated, and the ...
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From manufacture to disposal, the interaction of graphdiyne based nanomaterials with living organisms is inevitable and crucial. However, the cytotoxic properties of this novel carbon nanomaterial are rarely investigated, and the mechanisms behind their cytotoxicity are totally unknown. In this study, the antibacterial activity of graphdiyne (GDY) and graphdiyne oxide (GDYO) is reported. GDY is capable of inhibiting broad-spectrum bacterial growth while exerting moderate cytotoxicity on mammalian cells. In comparison, GDYO exhibits lower antibacterial activity than that of GDY. Then an alterable, synergetic antibacterial mechanism of GDY, involving wrapping bacterial membrane, membrane insertion and disruption, and reactive oxygen species generation is demonstrated, while the differential gene expression analysis indicates that GDY could only alter the bacterial metabolism slightly and the oxidative stress route may be a minor bactericidal factor. The investigation of the antibacterial behaviors of GDY based nanomaterials may provide useful guidelines for the future design and application of this novel molecular allotrope of carbon.
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Metal clusters have emerged as one of the most important electrocatalysts and have attracted widespread research attentions recently. However, metal clusters electrocatalyst seriously suffers from stability issue. Unfortunately, h...
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Metal clusters have emerged as one of the most important electrocatalysts and have attracted widespread research attentions recently. However, metal clusters electrocatalyst seriously suffers from stability issue. Unfortunately, how to stabilize these highly reactive metal clusters remains challenging for the whole community. Here, a brand new strategy to stabilize metal cluster by regulating its surface electronic perturbation intensity is proposed and the case Co clusters can be stabilized by adopting electron-rich Graphdiyne (GDY) nanoarray as the supporting matrix (Cu@GDY-Co) is reported. The strong electronic perturbation that originates from GDY would effectively stabilize Co clusters, and further lead to excellent electrocatalytic activity for both hydrogen and oxygen evolution. The resulting catalytic performance is comparable to the state-of-the-art non-noble metal catalyst for overall water splitting. The innovation herein paves the way for stabilization of highly efficient metal clusters electrocatalyst in the future.
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Graphdiyne (GDY) is a new two-dimensional ordered carbon oxide composed of sp and sp(2) hybrid carbon atoms. It holds great application potential due to the uniformly distributed pores and design flexibility. However, the present ...
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Graphdiyne (GDY) is a new two-dimensional ordered carbon oxide composed of sp and sp(2) hybrid carbon atoms. It holds great application potential due to the uniformly distributed pores and design flexibility. However, the present preparation technology is still limited to obtain graphdiyne oxide (GDYO) nanosheets from oxidation of exfoliated GDY, just depending on strong corrosive acid as an oxidant. Herein, this work reports a simple, efficient, liquid-phase exfoliation strategy, in which supercritical carbon dioxide (SC CO2) was first proposed to directly exfoliate GDY and prompt their oxidation into ultrathin GDYO nanosheets. The introduced CO2 molecules can cause the increase of bond lengths and bending degree of the intermediate C bond, and it can weaken and further break acetylenic bonds, which is proved by density functional theory (DFT) calculations. Meanwhile, experimentally GDYO nanosheets also show excellent light-to-heat conversion performance with a photothermal conversion efficiency of 63.95%. Therefore, this work provides a new environmentally friendly way to design and develop advanced carbon-based materials and indicates GDYO-based materials fundamentally significant in biomedicine, environmental governance.
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Graphdiyne and its analogs are a series of artificial two-dimensional nanomaterials with sp hybridized carbon atoms, which can be viewed as the insertion of two acetylenic units between adjacent aromatic rings, evenly expanded on ...
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Graphdiyne and its analogs are a series of artificial two-dimensional nanomaterials with sp hybridized carbon atoms, which can be viewed as the insertion of two acetylenic units between adjacent aromatic rings, evenly expanded on a flat surface. Although developed in recent years, new synthetic strategies for graphdiyne analogs are still required. This work proposed a new method to prepare hydrogen-substituted graphdiyne powder via a dehalogenative homocoupling reaction. The polymerization was unanticipated while the initial goal was to synthesize a γ-graphyne analog via Sonogashira cross-coupling reaction. Compared with previous synthetic strategies, the reaction time was conspicuously shortened and the Pd catalyst was inessential. The powder obtained exhibited a porous structure and high electrocatalytic activity in the hydrogen/oxygen evolution reaction, which has the potential for application in electrochemical catalysis. The reported methodology provides an efficient synthetic strategy for large-scale preparation.
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The discovery of graphene has catalyzed the search for other 2D carbon allotropes, such as graphynes, graphdiynes, and 2D pi-conjugated polymers, which have been theoretically predicted or experimentally synthesized during the pas...
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The discovery of graphene has catalyzed the search for other 2D carbon allotropes, such as graphynes, graphdiynes, and 2D pi-conjugated polymers, which have been theoretically predicted or experimentally synthesized during the past decade. These materials exhibit a conductive nature bound to their pi-conjugated sp(2) electronic system. Some cases include sp-hybridized moieties in their nanostructure, such as acetylenes in graphynes; however, these act merely as electronic couplers between the conducting pi-orbitals of sp(2) centers. Herein, via first-principles calculations and quantum transport simulations, we demonstrate the existence of an acetylene-meditated transport mechanism entirely hosted by sp-hybridized orbitals. For that we propose a series of nanostructured 2D materials featuring linear arrangements of closely packed acetylene units which function as sp-nanowires. Because of the very distinct nature of this unique transport mechanism, it appears to be highly complementary with pi-conjugation, thus potentially becoming a key tool for future carbon nanoelectronics.
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Graphdiyne (GDY), a novel two-dimensional (2D) carbon material with sp- and sp~2-hybridized carbon atoms, has earned a lot of attention in recent years. Owing to its low reduction potential and highly conjugated electronic structu...
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Graphdiyne (GDY), a novel two-dimensional (2D) carbon material with sp- and sp~2-hybridized carbon atoms, has earned a lot of attention in recent years. Owing to its low reduction potential and highly conjugated electronic structure, it can be used as a reducing agent and stabilizer for the electroless deposition of highly dispersed Au nanoparticles. In this paper, we observe that exfoliated GDY (eGDY), the exfoliation of bulk GDY into single- or few-layered GDY in aqueous solution, can be used as an excellent substrate for the electroless deposition of very small Au nanoparticles to form a Au/eGDY nanocomposite that exhibits higher catalytic performance for the reduction of 4-nitrophenol. The higher catalytic performance is considered to arise from the high specific surface area of eGDY and the electroless deposition of active metal catalysts with eGDY as the support. Our results inspired the present investigation into the use of eGDY for the development of highly efficient catalysts.
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In the study, the structural and electronic properties of zigzag Graphdiyne nanotube (2, 2) in the pure state and in the presence of lithium and nitrogen impurities were studied using the density functional theory method. The stru...
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In the study, the structural and electronic properties of zigzag Graphdiyne nanotube (2, 2) in the pure state and in the presence of lithium and nitrogen impurities were studied using the density functional theory method. The structure investigation shows that the pure Graphdiyne nanotube is a semiconductor with a direct band gap of 0.65eV at gamma point. By inserting the lithium and nitrogen impurities, nanotubes exhibit the metallic behavior. The optical properties of all nanotubes above-mentioned were examined and computed using SIESTA package and based on Kramers–Kronig relations. Optical investigations show that placing the lithium atom in the center of the nanotube has little effect on the optical properties, but, by substituting the nitrogen atoms for carbon atoms, the optical properties significantly change.
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摘要 :
Graphdiyne (GDY) is a novel two-dimensional (2D) carbon allotrope that has attracted much attention in materials,
physics, chemistry, and microelectronics for its excellent properties. Much effort has been devoted to
exploring t...
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Graphdiyne (GDY) is a novel two-dimensional (2D) carbon allotrope that has attracted much attention in materials,
physics, chemistry, and microelectronics for its excellent properties. Much effort has been devoted to
exploring the biomedical applications of GDY in 2D carbon nanomaterials, especially for smart drugs and gene
delivery. However, few studies have focused on the biocompatibility and potential environmental hazards of
GDY and its derivatives. In this study, graphdiyne oxide (GDYO) and graphene oxide (GO) were obtained using
different oxidation methods. Their cytotoxicity and hemolysis in vitro and biocompatibility in subcutaneous and
peritoneal locations in vivo were compared. GDYO had very low biotoxicity in vitro and was moderately
biocompatible in the muscle and abdominal cavity in vivo. Highly oxidized products and graphdiyne quantum
dots (GDQDs) were observed in peritoneal cells. GDYO had better biocompatibility and its sheet size was easily
diminished through oxidative degradation. Therefore, GDYO is a good candidate for use in 2D carbon nanomaterials
in biomedicine.
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Triboelectric nanogenerator (TENG), coupling the contact electrification and electrostatic induction, has been proved to be a promising energy harvester due to its excellent reliability, considerable output power, high efficiency,...
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Triboelectric nanogenerator (TENG), coupling the contact electrification and electrostatic induction, has been proved to be a promising energy harvester due to its excellent reliability, considerable output power, high efficiency, and low cost. Herein, with the designed hydrophobic carbon material methyl-graphdiyne (M-GDY) based nano thorn arrays as TENG core element, we developed a novel high-performance self-powered wind speed sensor possessing remarkable water/cold resistance, which can stably run for a long time and be directly applied in the typical extreme environment. As the electrode composing uniformly distributed methyl groups in a twodimensional plane, M-GDY can provide a convenient path for rapid charge transfer through interfaces. By in-situ growing M-GDY with nano thorn arrays structure directly on the surface of the copper foil to provide enhanced contact area and superhydrophobic properties, such M-GDY based TENG can be realized simultaneously and induce excellent performance with a stable response and real-time voltage feedback. Significantly, the superhydrophobic properties of that M-GDY-based TENG endow it with broad applicability in humid conditions. Besides, for the unique carbon-rich structure of the M-GDY array, the M-GDY-based TENG can be well applied with stable output performance under different temperatures ranging from -20 degrees C to 30 degrees C. The specially designed TENG with GDY-based material affords us a novel TENG core material and expands self-powered devices for a specific environment.
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