Encapsulation of whole microbial cells in nanofibers for use in microbial fuel cells was the main focus of this investigation. By using an electrostatic spinning device with two coaxial capillaries, the continuous nan...
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Encapsulation of whole microbial cells in nanofibers for use in microbial fuel cells was the main focus of this investigation. By using an electrostatic spinning device with two coaxial capillaries, the continuous nanofibers of a core hydrogel encapsulating bacterial cells and a shell polymer can be fabricated. Moreover, we use QDs to label the cells to simultaneously detect cells condition. The results show that successfully encapsulated in fibers with the cells retaining their viability for 30 days at room temperature and the QDs not only be very effective in cells imaging but also can enhance the photoelectric conversion efficiency of electricity production cells. This nanofiber may have the potential application in Microbial fuel cells.
The preparation and stabilization of metallic nanoparticles are of great importance in the field of nano-catalysis. The developments in supermolecular self-assembled porous materials enabled catalytic metal nanopartic...
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The preparation and stabilization of metallic nanoparticles are of great importance in the field of nano-catalysis. The developments in supermolecular self-assembled porous materials enabled catalytic metal nanoparticles to be hosted inside the pores of such porous materials for enhancing the stability of these metallic nanoparticles, which is the drawback for bare metallic nanoparticles because of their deformation or aggregation. Herein, we report the design of a high-surface-area model catalytic system that consists of highly uniform PtPd bimetallic nanocrystals inside of mesocellular foam (PtPd@MCF) via one-step simple and easy impregnation route. The inorganic silica meso-channels play dual important roles in mass transfer of bimetallic nanoparticle synthesis and catalysis reation. This study represents a strategy in catalyst design that utilizes nanoscience to fabricate active catalyst sites, which are grown inside a support to produce a model heterogeneous catalyst. The results suggest that the high thermal stability of these composites are excellent nanocatalytic systems for high-temperature catalytic reations. The synthetic approach described here in facile and general for the design of practical catalysts and nanoreactors, which combined functionalities in all of the compositions. The design concept can also be extended to other metal/metal oxide compositions and porous materials for the design of various function composites.
Rechargeable lithium batteries have been widely used for consumer electronics and are desirable for the development of hybrid electric vehicles and electric vehicles, due to their high energy density and good environm...
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Rechargeable lithium batteries have been widely used for consumer electronics and are desirable for the development of hybrid electric vehicles and electric vehicles, due to their high energy density and good environment *** enhanced electrochemical performance of electrodes depends on not only the material intrinsic characteristics, but also the designed ***-dimensional (1D) nanostructures can offer large surface area and efficient electron transport pathway to achieving high *** a functional nanostructure, nanoscroll with open ends/edges could provide easy radial expansion by interlayer sliding to buffer the swelling during lithiation/delithiation.
Lithium-ion batteries (LIBs) are receiving considerable attention as storage devices in the renewable and sustainable energy ***, facile fabrication of long-life and high-rate cathode materials for LIBs is required to...
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Lithium-ion batteries (LIBs) are receiving considerable attention as storage devices in the renewable and sustainable energy ***, facile fabrication of long-life and high-rate cathode materials for LIBs is required to facilitate practical application.
Noble-metal nanostructures have attracted considerable research interest in both fundamental studies and various practical applications because of their unique catalytic, electronic, photonic, and sensing properties. ...
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Noble-metal nanostructures have attracted considerable research interest in both fundamental studies and various practical applications because of their unique catalytic, electronic, photonic, and sensing properties. However, because of their high cost and limited reserves, it is urgent to reduce their required usage in such applications. Controlling the morphology of noble-metal nanostructures can provide a great opportunity to improve their catalytic properties and increase their activity based on their mass. Here, we report a convenient and effective wet-chemical strategy that produces uniform porous PtPd bimetallic nanostructures with perpendicular pore channels and ultrathin branches. It was demonstrated that the porous PtPd bimetallic nanostructures exhibited high activity for oxygen reduction reaction (ORR), where they outperformed the Pt-black catalyst and the state-of-the-art Pt/C catalyst on the basis of equivalent Pt mass. This high performance can be attributed to the high surface area and perpendicular dendritic structures in the porous PtPd bimetallic nanostructures that provide highly accessible surface active site, as well as maintain the structural integrity of the catalysts. Our approach provides a promising route to the development of next-generation catalysts with substantial reduction in noble-metal loading while retaining high ORR activity.
One-dimensional nanomaterials have attracted significant attention for a wide range of energy-related applications due to such unique advantages as short Li-ion insertion/extraction distance, facile strain relaxation ...
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One-dimensional nanomaterials have attracted significant attention for a wide range of energy-related applications due to such unique advantages as short Li-ion insertion/extraction distance, facile strain relaxation upon electrochemical cycling, enhanced electron transport, and very large surface to volume ratio.
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