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Stable and cost-effective catalysts for efficient ammonia synthesis under mild conditions particularly at ambient pressure and temperature have been pursued widely and intensively. Recently we have reported a method using a composite catalyst with nano iron oxide hosted in a three-dimensional cross-linked graphene template material, Fe@3DGraphene. With this catalyst, a light driven and efficient ammonia...
Two-dimensional poly(triazine imide) nanosheets have attracted increasing attention due to the diverse functionalities, however, it remains a challenge to synthesize poly(triazine imide) nanosheets directly from molecular monomers. Here, a novel bottom-up ionothermal method of high efficiency was developed for the synthesis of ultrathin amorphous poly(triazine imide) (aPTI) nanosheets from molecular...
We developed an unconventional route to produce uniform and intimately interfaced nanocomposite films for their potential application in thermoelectric (TE) devices. Here, amino-terminated poly(3-hexylthiophene-2,5-diyl) (P3HT) was chemically adhered onto the surface of a functionalized double-walled carbon nanotube (DWCNT), via an amidation reaction, to form P3HT-grafted DWCNT (P3HT-g-DWCNT). As...
To enhance the bonding strength and oxyacetylene ablation resistance of the ZrB2–ZrC coated C/C–ZrB2–ZrC–SiC composites obtained by the combination of supersonic atmosphere plasma spray (SAPS) and precursor infiltration and pyrolysis (PIP), novel SiC nanowire (SiCnw)/pyrolytic carbon (PyC) core-shell structures are designed and introduced into the coating. Compared to SiC nanowires which are widely...
The sintered polycrystalline diamond compacts (PDC) can be used in drilling in outer space with its excellent tribological properties such as low friction coefficient and high wear resistance. However, an unsatisfactory adhesion resistance behavior should be brought to the forefront, which may be the main factor resulting in the failure of PDC under vacuum environment. Consequently, we make the first...
The polymerization of fullerenes has been an interesting topic for almost three decades. A rich polymeric phase diagram of C60 has been drawn under a variety of pressure-temperature conditions. However, only linear or perpendicular linkages of C60 are found in the ordered phases. Here we used a unique bilayer structural solvate, C60·1,1,2-trichloroethane (C60·1TCAN), to generate a novel quasi-3D C...
Although recent experimental studies have demonstrated that doping of nanoporous carbons with nitrogen is an effective strategy for highly diluted formaldehyde capture, the impact of carbon surface chemistry and the pore size on formaldehyde capture at ∼ppm concentrations is still poorly understood and controversial. This work presents a combined theoretical and experimental study on dynamic formaldehyde...
The development of functional composite nanomaterials based on graphene and metal nanoparticles (NPs) is currently the subject of intense research interest. In this study we report the preparation of novel type of graphene/Sn and graphene/SnOx (1 ≤ x ≤ 2) hybrid nanostructures and their investigation by scanning probe methods. First, we prepare Sn NPs by evaporating 7–8 nm tin on highly oriented pyrolytic...
The dynamics of photoexcited electrons associated with the absorption processes of the dominant peaks in pristine and nitrogen-doped chevron-type graphene nanoribbons (CGNRs and NCGNRs) have been investigated via nonadiabatic molecular dynamics simulations. The results show that the decay time in NCGNR is shorter than in CGNR. The results rationalized by the large energy difference between LUMO and...
Na3V2(PO4)3 (NVP) is a promising cathode material for sodium ion batteries due to the good electrochemical performance in terms of cycling stability and rate capability. However, in order to access this performance a carbon coating is required to enhance the intrinsically poor material's conductivity. Herein, we systematically investigate the role of N-doped carbon (NC) coatings on both the structural...
Organic solvent nanofiltration (OSN) membranes with excellent and tuneable molecular separation performances are important in pharmaceutical industry. Here, we report reduced graphene oxide (rGO) membranes intercalated with self-assembled 5, 10, 15, 20-tetrakis (1-methyl-4-pyridinio) porphyrin (TMPyP) molecules for this purpose. These membranes showed strong tolerances to water and various organic...
Although lithium-sulfur batteries are considered as promising high-energy-storage system owing to their high energy density, developing effective materials to host sulfur species on the cathode is still challenging. Herein, an inexpensive and effective carbon precursor, catechol and polyamine is explored to fabricate nitrogen/oxygen dual-doped hollow carbon nanospheres (DHCSs) as sulfur hosts. The...
It is a great challenge to fabricate lightweight microwave absorption materials (MAMs) with strong electromagnetic wave attenuation over wide frequency range. In this work, ultralight multiwalled carbon nanotube (MWCNT)/graphene foams (CGFs) are prepared through a facile solvothermal method and their microwave absorption (MA) properties are fully investigated. The CGFs exhibit tunable complex permittivity...
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