نتایج جستجو برای: graphitic mesoporous carbon

تعداد نتایج: 290670  

2008
S. COSTA E. BOROWIAK-PALEN M. KRUSZYŃSKA A. BACHMATIUK R. J. KALEŃCZUK

Application of Raman spectroscopy to analyse carbon nanotubes has been presented. Having a mixture of various carbon nanotube samples, one can easily distinguish, in a quick experiment, presence of singlewalled, doublewalled and multiwalled carbon nanotubes (SWCNT, DWCNT, MWCNT, respectively). The so-called G-line is a characteristic feature of the graphitic layers and corresponds to the tangen...

2013
Eon Sung Shin Min-Seop Kim Won Il Cho Si Hyoung Oh

The intrinsic low conductivity of sulfur which leads to a low performance at a high current rate is one of the most limiting factors for the commercialization of lithium-sulfur battery. Here, we present an easy and convenient method to synthesize a mono-dispersed hollow carbon sphere with a thin graphitic wall which can be utilized as a support with a good electrical conductivity for the prepar...

2014
Abraham Wolcott Theanne Schiros Matthew E. Trusheim Edward H. Chen Dennis Nordlund Rosa E. Diaz Ophir Gaathon Dirk Englund Jonathan S. Owen

We investigate the aerobic oxidation of high-pressure, high-temperature nanodiamonds (5-50 nm dimensions) using a combination of carbon and oxygen K-edge X-ray absorption, wavelength-dependent X-ray photoelectron, and vibrational spectroscopies. Oxidation at 575 °C for 2 h eliminates graphitic carbon contamination (>98%) and produces nanocrystals with hydroxyl functionalized surfaces as well as...

Journal: :Chemcatchem 2021

Nanostructuring earth-abundant metals as single atoms or clusters of controlled size on suitable carriers opens new routes to develop high-performing heterogeneous catalysts, but resolving speciation trends remains challenging. Here, we investigate the potential low-nuclearity iron catalysts in continuous liquid-phase semi-hydrogenation various alkynes. The activity depends multiple factors, in...

2015
S. E. Moradi

In the present work, well ordered, mesoporous carbon nitride (MCN) sorbent with uniform mesoporous wall, high surface area and pore volume has been fabricated using the simple polymerization reaction between ethylene diamine and carbon tetrachloride in mesoporous silica media, and then modified by TiO2 nanoparticles (Ti-MCN). The structural order and textural properties of the nanoporous materi...

1997
M. Sternberg W. R. L. Lambrecht

A theoretical study of diamond/silicon (001) interface structures with and without graphitic interlayers using a density functional based tight–binding molecular dynamics method is presented. The study is motivated by recent progress towards diamond heteroepitaxy on Si (001) using the bias technique. The proposal by Robertson (1995) that an initial graphitic deposit with the graphite planes nor...

2009
Denis Foy Gérard Demazeau Pierre Florian Dominique Massiot Christine Labrugère Graziella Goglio Denis FOY Gérard DEMAZEAU Pierre FLORIAN Dominique MASSIOT Christine LABRUGERE Graziella GOGLIO

An hydrogenated nitrogen-rich graphitic carbon nitride, structurally related to the theoretical graphitic phase of C3N4, has been synthesized in a bulk wellcrystallized form. This new material was prepared by thermal decomposition of thiosemicarbazide up to 600°C at ambient pressure under nitrogen flow. Its composition was determined by elemental combustion analysis. Powder X-ray diffraction, i...

Journal: :Chemical communications 2008
Lei Wang Chungui Tian Baoli Wang Ruihong Wang Wei Zhou Honggang Fu

Graphitic carbon nanocapsules, nanosheets and nanoplates were selectively obtained via a solid-state pyrolysis route from various ion-exchange resin-iron complexes.

2016
Julien Kiener Ovidiu Ersen Julien Parmentier Samuel Bernard André Ayral Philippe Miele

Nanocomposites of ordered mesoporous carbon associated with chromium nitride (CrN) or vanadium nitride (VN) nanoparticles were obtained by a simple one-pot synthesis based on the solvent evaporation induced self-assembly (EISA) process using Pluronic triblock surfactant as soft-template and a phenol-based resin (resol) as carbon precursor. These nanocomposites were characterized by X-ray diffra...

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