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Highly-crystalline 2-dimensional (2D) graphitic carbon nitride (g-C3N4) nanosheets with low structural imperfection usually possess high photocatalytic activity that benefits from the suppressed electron–hole recombination. However, the conventional exfoliation strategy is incapable for fast and clean preparation of such highly-quality g-C3N4 nanosheets from their bulk-type counterparts. Herein, highly-crystalline...
Electromagnetic interference (EMI) originated from radio stations to various electronic appliances and devices is an increasingly serious problem, and there are significant interests in the development of light-weight, high-efficiency materials for EMI shielding. Herein we report novel carbon nanotube (CNT) composite films synthesized by a simple spray and vacuum-filtration method. The film containing...
Vertically aligned Carbon Nanotube (CNT) arrays are synthesized directly on CNT sheets used as substrates by plasma enhanced chemical vapor deposition (PECVD) in NH3 plasma environment. The resulting 3-D nanostructured, N-doped CNT (NCNT) architecture combines high conductivity and superior mechanical properties of CNT sheets with porous structure and high electrochemical activity of CNT arrays. NCNT...
The formation of an aerogel-like sock is important to the floating catalyst method of synthesizing carbon nanotubes (CNTs). The sock, a term coined by Alan Windle, is an assembly of the individual electrostatically assembled nanotubes synthesized in the reactor. The coherency of this sock helps form the yarn or sheet. In this study, sock formation is investigated by controlling the feedstock type,...
A large number of carbon nanotube (CNT) applications require that CNTs be assembled into fibers and films at speeds viable for industrial production processes. Most of the state-of-art CNT thread formation techniques of CNT fiber production in meters per second (m/s) are still an order of magnitude lower than typical industrial processes. Here, we report a modified dry spinning process with improved...
Syntheses of multifunctional structures, both in two-dimensional and three-dimensional space, are essential for advanced graphene applications. A variety of graphene-based materials has been reported in recent years, but combining their excellent mechanical and electrical properties in a bulk form has not been entirely achieved. Here, we report the creation of novel graphene structures such as graphene...
SiO 2 -matrix composites filled with 2, 5 and 10wt.% multiwalled carbon nanotubes (MWCNTs) were prepared to evaluate the dielectric properties and microwave attenuation performances over the full X-Band (8.2–12.4GHz) at a wide temperature ranging from 100 to 500°C. On the basis of the conductivity induced by the structure of the MWCNT, the transport of migrating and hopping electrons in the...
A new approach is described for preparing carbon foam (CF) through coaxial electrohydrodynamic atomization (EHDA). Using polyacrylonitrile (PAN) and borneol as a carbonaceous precursor and a blowing agent, respectively, hybrid PAN-borneol films were prepared and transferred to a honeycomb PAN membrane through blowing, drying, and pre-oxidation with the CF prepared by carbonization of the PAN film...
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