The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We report the first experimental measurement on the thermal conductivity of strained monolayer graphene using optothermal Raman method. Biaxial tensile strain was achieved by applying a pressure difference across suspended monolayer graphene membranes. Experimental results demonstrate that, under 0.12%–0.27% strains, the in-plane thermal conductivity of monolayer graphene is sensitive to the applied...
Catalytic properties of thermally reduced (TRGO) and nitrogen-doped thermally reduced (N-TRGO) graphene oxides in acetylene hydrogenation in the temperature range of 50–400 °C were studied. The N-TRGO and TRGO materials were characterized by transmission and scanning electron microscopy, X-ray diffraction, Raman, infrared and X-ray photoelectron spectroscopies as well as elementary analysis techniques...
Carbon nanotubes (CNTs) are regarded as promising transistor building blocks for the future integrated circuits. For real circuits applications, high I on /I off ratio with low I off are desired for the transistor due to the requirements of high working speed and low power consumption. However, due to the intrinsic ambipolarity of the CNT, pronounced ambipolar behaviors with considerably high I...
Due to its sustainability, biomass materials shows great potential in replacing mineral carbon source to fabricate high-energy electrode materials, and efficient routes have been explored to synthesize and regulate biomass-derived carbonaceous materials with rational structures to enable their applications. Herein, a simple and recyclable molten-salt route is used to synthesize porous ultrathin biocarbon...
Driven by the advent of fullerenes, carbon nanotubes and graphene, designing or tailoring sp2-rich carbon clusters in carbon based films attains very interesting properties which can be ideal in various applications. Depositing sp2-rich clusters evolve toward a three-dimensional arrangement (composed of extended, bent, and cross-linked graphite basal planes, i.e. fullerene-like carbon (FLC)) or nanocrystalline...
Water desalination is a widely-used strategy to provide fresh water around the world. Herein we report an atomistic simulation study on water desalination in a series of bilayer graphene with different ripples. By carefully analyzing the orientation, density map, and transmembrane velocity of water molecules, it is found that the size of interlayer space formed by ripples affects the water transport...
Integrated theranostic agents can provide multifunctional platforms for synergetic cancer diagnosis and therapy. However, the efficiency and safety of agents are of great concern. In this work, we prepared biocompatible and pH-sensitive MnO-loaded carbonaceous nanospheres (MnO@CNSs) for simultaneous magnetic resonance imaging (MRI) and photothermal therapy (PTT). Carbonaceous nanospheres (CNSs) with...
Friction and wear of motion components operating under harsh lubrication conditions are key aspects that must be considered in vast numbers of applications. In the present work, graphene oxide (GO) functionalized in-situ with ionic liquid (IL) were uniformly dispersed into epoxy (EP) via a two-phase extraction route. In comparison to as-exfoliated GO, GO functionalized with IL (GO-IL) showed significantly...
Amorphous carbon-based anode materials are considered as one of the most promising candidates for sodium-ion batteries (SIBs). However, there are two main barriers before large-scale industrialization, i.e. low initial coulombic efficiency (ICE) and high cost caused by low carbon yield of precursors. In this work, we report a novel commercial activated amorphous carbon-based anode synthesized through...
Cyclic microbridge tests were applied to investigate the mechanical properties of the 100-to-400-nm-thick graphene oxide membranes. The effective Young’s moduli of different thickness graphene oxide membranes were derived and proved to be size dependent. The self-reinforcing behavior of graphene oxide membranes, which exhibits as an increase in Young’s modulus after cyclic loading, was observed and...
Although hard carbons have been turned out to be suitable for sodium storage, their high cost and low initial coulombic efficiency (ICE) need to be addressed for the commercial application. Here, we report an effective route including a pyrolysis process and a reductive strategy to synthesize high-performance hard carbons from waste apricot shell. The obtained hard carbons inherit the unique architecture...
We demonstrate the spin filtering effect in Co|MgO|TiOx|graphene junctions and a large negative spin polarization in graphene at room temperature. By systematically introducing Ti (TiOx) clusters to the exfoliated few-layer graphene, we confirm that the Ti (TiOx) clusters will increase the charged impurity scattering and lead to a decreased momentum scattering time and an abnormal Gaussian broadening...
Luminescent hybrid materials were prepared by covalently functionalizing nanodiamonds (NDs) with rare earth (RE) complexes. Pyromellitic acid (PMA), as the organic sensitizer, was grafted onto amino-terminated NDs to chelate lanthanide ions (Eu3+ and Tb3+). The emission colors of the hybrid composite of ND-PMA-EuxTby can be tuned from red to orange, yellow and green by adjusting the molar ratio of...
Developing low cost and high performance catalyst for oxygen reduction reaction (ORR) is a critical factor for novel energy sources. In this paper, we adopt carbon nanotube (CNT) as carbon source to synthesize titanium carbide (TiC). With the catalysis of iodine and sodium, the CNT react with titanium particles and in-situ synthesizes co-axial TiC@carbon nanotube (TiC@CNT). The co-axial structure...
Preparation of high-performance carbon materials with an abundance of heteroatoms, edges, and defects for sustainable energy-conversion technologies, such as supercapacitors and oxygen reaction reduction (ORR), are still a challenge. Herein, we reported a facile strategy for the large-scale synthesis of nitrogen-doped porous carbon via carbonization of core-shell structured protonated g-C3N4@polypyrrole...
Mo2C@NC@MoSx porous nanospheres with sandwich shell have been synthesized for efficient hydrogen evolution in both acidic and alkaline media. Firstly, porous MoO2-Mo2C@NC nanospheres have been obtained with ultrafine Mo2C nanocrystallines as core and ultrathin N-doped carbon (NC) as shell through the carbonization of MoO42--/aniline-pyrrole (MoO42--Polymer) as precursor. Secondly, Mo2C@NC@MoSx porous...
A low-cost and sustainable anode material is essential for the future commercialization of sodium-ion batteries (SIBs). Among all proposed anode materials for SIBs, hard carbons are considered to hold the most promise. However, high cost and low carbon yield of precursors limit its industrialization process. Here the synthesis of a biomass-derived hard carbon from leonardite humic acid (LHA) through...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.