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Boron carbon oxynitride (BCNO) phosphors can exhibit remarkable tunable emission colors and greenish persistent luminescence without the assistant of rare-earth ion dopants. However, the photoluminescent and persistent luminescence (PL) mechanisms of BCNO are still not fully understood. In this work, we attempt to reveal distinct photoluminescent and PL mechanism of BCNO based on the first-principles...
Graphitized carbon nano-cages can be prepared by carbon dioxide and magnesium metal as precursors. The carbon materials can produce a large amount of functional groups by the oxidation of nitric acid. Compared with amorphous carbon, the oxidation treatment can improve capacitive performance of carbon nano-cages, especially rate performance. At high scan rate, specific capacitance of carbon nano-cages...
Here we report a fully foldable lithium-ion battery (LIB) with high energy density using Li4Ti5O12 (LTO) as the anode and LiCoO2 (LCO) as the cathode with free standing carbon nanotube (CNT) Macro-Films (CMF) as the current collectors. The CMFs were produced using a scalable Floating Catalyst Chemical Vapor Deposition method. The highly flexible CMFs could be folded multiple times without plastic...
The effect of the type of carrier gas on the bulk density and microstructure distribution of carbon/carbon (C/C) composites fabricated by thermal gradient chemical vapor infiltration from propylene was investigated. The results show that the type of carrier gas has an appreciable influence on the radial distribution of density and microstructure of the C/C composites. When N 2 is used as carrier...
The catalytic effect of boric acid on the graphitization and surface structure of polyacrylonitrile-based carbon fibers was investigated by dipping fibers in boric acid before heating at 2500°C. The thermal conductivity of carbon/carbon composites produced from the modified carbon performs by chemical vapor infiltration was also studied. The results show that the treatment by boric acid has a catalytic-graphitization...
A zirconium carbide (ZrC) protective coating was deposited on carbon/carbon (C/C) composites by atmospheric pressure chemical vapor deposition. The phase compositions, surface and cross-section microstructures, and anti-ablative properties of the coatings were investigated. Results show that the method is an effective route to prepare a dense and thick ZrC coating on C/C composites. The coating can...
Oxidized and polished multi-walled carbon nanotubes (MWCNTs) were dispersed in aqueous solution, providing a highly stable suspension of purified, shortened, and functionalized carboxylic acid nanotubes. A gonadotrophin releasing hormone (GnRH), which was overexpressed in the plasma membrane of several types of cancer cells, was covalently anchored onto the surface of the oxidized MWCNTs via an amide...
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