The double‐ or triple‐decker 3D metallo‐hexagons were obtained by self‐assembly of multitopic tris‐terpyridines with Cd 2+ ions in near‐quantitative yield. Comprising up to 72 ionic pairs, the multiple spoked wh...
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The double‐ or triple‐decker 3D metallo‐hexagons were obtained by self‐assembly of multitopic tris‐terpyridines with Cd 2+ ions in near‐quantitative yield. Comprising up to 72 ionic pairs, the multiple spoked wheels display characteristic reversible gelation properties under thermodynamic conditions. The supramolecular metallo‐nanoarchitectures were characterized by 1 H NMR, 2D NMR (COSY and NOESY), and diffusion‐ordered spectroscopy (DOSY) and HR‐ESI‐MS, traveling‐wave ion mobility mass spectrometry (TWIM‐MS), TEM, and AFM. For the first time, the self‐assembly of 45 units at once was demonstrated to yield exceptional giant triple‐decker hexagons of up to circa 42 000 Da.
Silica hollow sphere as mesoporous molecular sieve which had high various usability had been synthesized by the simple and inexpensive method from using a water/oil/water（W/O/W） emulsion *** silica hollow sphere as ...
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Silica hollow sphere as mesoporous molecular sieve which had high various usability had been synthesized by the simple and inexpensive method from using a water/oil/water（W/O/W） emulsion *** silica hollow sphere as the support of nickel catalyst was compared with a commercial porous silica for methane reforming reaction with carbon *** samples were characterized by N-adsorption and desorption,X-ray diffraction,H-temperature programmed reduction,Energy dispersive X-ray spectrometry,Transmission electron microscope,X-ray photoelectron spectroscopy and Thermal gravimetric *** catalytic performance of all catalysts was inquired at 750℃,atmospheric pressure and GHSV of 12500 ml·g·*** results showed that the metallic nickel supported on silica hollow sphere had smaller particle size and higher dispersion than the commercial porous ***,superior performance catalytic in methane reforming of the nickel catalyst was proposed based on the mesoporous structure in the hollow sphere,its easily passing of the reactants to spheres,particularly the amount of decreased carbon deposition.
Centrifugal spinning is a simple and versatile technique for producing nanofibers from various materials. One major application of centrifugal spinning is to produce advanced functional nanofibers for energy storage. ...
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Centrifugal spinning is a simple and versatile technique for producing nanofibers from various materials. One major application of centrifugal spinning is to produce advanced functional nanofibers for energy storage. Among the various energy storage technologies, supercapacitors have been considered as effective solution to the increasing need for high-power energy storage. Novel centrifugally-spun nanofibers with functional properties can dramatically alter surface reaction rates and charge transport throughout the supercapacitors, causing significant improvement in energy storage efficiency. Here, we present our work on the development of advanced functional nanofibers and the integration of these materials into advanced supercapacitors to achieve high system performance.
Hematite iron oxide (α-Fe2O3) has received much attention for use as anode material in lithium-ion batteries not only due to its high theoretical capacity but also to its nontoxicity and low cost. However, its practi...
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Hematite iron oxide (α-Fe2O3) has received much attention for use as anode material in lithium-ion batteries not only due to its high theoretical capacity but also to its nontoxicity and low cost. However, its practical applications are limited by its low electrical conductivity as well as the large volume change during Li ion insertion/extraction process. Carbon coated α-Fe2O3 nanofibers were prepared via electrospinning followed by a thermal treatment process in this work, which were used as anode material for lithium-ion batteries. A high reversible capacity of 842 mAh g-1 at a current density of 50 mA g-1 at the 50th cycle was achieved for α-Fe2O3/C nanofibers containing 12.5 wt% carbon. Such excellent electrochemical performance could be attributed to their unique fabric structure and the conductive carbon coating which could shorten Li ion transport distance, improving Li ion reversibility and kinetic properties.
In weakly interacting organic semiconductors, static and dynamic disorder often have an important impact on transport properties. Describing charge transport in these systems requires an approach that correctly takes ...
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