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To explore the effect of tube sizes and filling process on dielectric properties of carbon nanotubes (CNTs), CNTs with various diameters and lengths were applied to synthesize Fe-filled CNTs through wet-chemical method. The permittivities of the composites of CNTs and paraffin rely on the dispersion state (agglomeration) of CNTs in polymer matrices. During the filling process, CNTs with diverse tube...
To tackle the issues of inferior cycling stability and low intrinsic conductivity for MnO as anode material for lithium ion batteries (LIBs), we design and rationally confine MnO@C core-shell nanorods homogeneously in the flexible graphene matrix via a facile process. The obtained composite exhibits a high reversible capacity (1165.3 mAh g−1 at 0.1 A g−1), excellent rate capability (618.5 mAh g−1...
Two kinds of surface-enhanced Raman scattering (SERS) substrates structured with hybrid of Ag nanoparticles (AgNPs) and graphene (GE) were synthesized, namely GE underneath AgNPs (AgNPs-GE) and GE covered AgNPs (GE-AgNPs). They provide a platform to make a comparative study on the optical properties and SERS effects of the hybrid structures as well as on the interactions between AgNPs and GE. The...
In present work, we demonstrate a synchronous carbonization and graphitization process to produce nanoporous graphitic carbon materials, using glucose as carbon source, and Ni-Dimethylglyoxime-complex, Ni(dmgH)2, as graphitization agent. The carbon samples exhibit good graphitic feature at the low carbonization temperature of 800 °C, with the BET surface area of 584 m2 g−1, and pore volume of 0.76 cm...
A three-dimensional (3D) surface-enhanced Raman scattering (SERS) substrate is fabricated by decorating multi-walled carbon nanotubes (MWNTs) arrays with silver nanoparticles (AgNPs) on silicon, via magnetron sputtering and annealing method. The MWNTs-AgNPs hybrids with 3D structure increase the coverage of plasmonic nanostructures. The effect of inter-particle and inter-tube coupling creates a multitude...
We synthesized a set of surface-enhanced Raman scattering (SERS) substrates with hybrid-structures including Ag nanoparticles (AgNPs), AgNPs on top of few-layer graphene (AgNPs-FLG), AgNPs underneath few-layer graphene (FLG-AgNPs), sandwich structure (FLG-AgNPs-FLG) and few-layer graphene (FLG). The experimental results indicate that FLG can effectively protect AgNPs against aerobic oxidation (up...
A columnar bamboo/lignite material was prepared by briquetting a mixture of bamboo carbon and lignite. Activated carbons were obtained by carbonizing the material at 500°C for 30min, followed by activation at 850°C for 2h using either steam or a gaseous mixture of ammonia in water with an ammonia concentration of 2.42mass%. The ammonia-activated carbon was soaked in 21.91% ammonia water for 5h and...
A series of highly nanoporous carbons have been prepared by converting benzoate–metal complexes, including zinc benzoate, magnesium benzoate and aluminium benzoate through a template carbonization process. The carbonization temperature plays a pivotal role in determining the carbon structures as well as the resultant electrochemical behaviors in supercapacitors. The carbon–Zn-900 sample derived from...
An isotactic polypropylene/multi-wall carbon nanotube (iPP/MWCNT) composite was prepared by a vibration injection moulding technique. The effect of the vibration field on the electrical conductivity property of samples was investigated. The results show that the electrical conductivities of the samples prepared by vibration injection moulding was far higher than those of samples prepared by conventional...
Jute fibres and corresponding epoxy based composites with sensing abilities could be realized by depositing multi-walled carbon nanotubes (MWCNTs) on the surfaces of jute fibres or fabrics using simple and scalable dip coating. The formation of electrically semiconducting MWCNT networks on jute fibre surfaces was confirmed, which in turn caused the formation of jute/epoxy interphases with highly concentrated...
The interphase between reinforcing fibre and matrix is a controlling element in composite performance. We deposited multi-walled carbon nanotubes (MWCNTs) onto electrically insulating glass fibre surfaces leading to the formation of semiconductive MWCNT–glass fibres and in turn multifunctional fibre/polymer interphases. The deposition process of MWCNTs onto glass fibre surfaces involved both electrophoretic...
Chemical states of nitrogen in the carbon aerogels synthesized from phenol-melamine-formaldehyde were investigated by elemental analysis, X-ray photoelectron spectroscopy and nitrogen adsorption. It is found that the carbon aerogels are rich in mesopores and the nitrogen content of the carbon aerogels increases from 1.6 to 3.1 wt. % with increasing melamine to phenol ratios. Over two-thirds of nitrogen...
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