Dechlorination of trichloroethylene in solution over supported nano zero valent Fe and Cu/Fe bimetal on exfoliated graphite

2006 ◽  
Vol 25 (S1) ◽  
pp. 132-133
Author(s):  
Huan Zhang ◽  
Zhaohui Jin ◽  
Lu Han ◽  
Zongming Xiu ◽  
Chenghua Qin
Keyword(s):  
Exfoliated Graphite

Employing Exfoliated Graphite as Novel Support Material for Heterogeneous Model Catalysts

2019 ◽  
Author(s):  
Moritz Wolf ◽  
Nico Fischer ◽  
Michael Claeys
Keyword(s):  
Surface Area ◽  
Graphite Powder ◽  
Model Catalysts ◽  
Model Systems ◽  
Exfoliated Graphite ◽  
Support Material ◽  
Heterogeneous Model ◽  
Support Materials ◽  
Metal Support Interaction ◽  
Catalyst Systems

<p>The inert nature of graphitic samples allows for characterisation of rather isolated supported nanoparticles in model catalysts, as long as sufficiently large inter-particle distances are obtained. However, the low surface area of graphite and the little interaction with nanoparticles result in a challenging application of conventional preparation routes in practice. In the present study, a set of graphitic carbon materials was characterised in order to identify potential support materials for the preparation of model catalyst systems. Various sizes of well-defined Co<sub>3</sub>O<sub>4</sub> nanoparticles were synthesised separately and supported onto exfoliated graphite powder, that is graphite after solvent-assisted exfoliation <i>via</i> ultrasonication resulting in thinner flakes with increased specific surface area. The developed model catalysts are ideally suited for sintering studies of isolated nano-sized cobaltous particles as the graphitic support material does not provide distinct metal-support interaction. Furthermore, the differently sized cobaltous particles in the various model systems render possible studies on structural dependencies of activity, selectivity, and deactivation in cobalt oxide or cobalt catalysed reactions.</p>

Kinetic Adsorption of Humic Acids Mixture Obtained from Microalgae on Exfoliated Graphite Nanoplatelets

2018 ◽  
Vol 69 (1) ◽  
pp. 191-195
Author(s):  
Elena Radu ◽  
Elena Emilia Oprescu ◽  
Cristina Emanuela Enascuta ◽  
Catalina Calin ◽  
Rusandica Stoica ◽  
...  
Keyword(s):  
Humic Acid ◽  
Humic Acids ◽  
Alkali Treatment ◽  
Exfoliated Graphite ◽  
Acid Mixture ◽  
Acidic Ph ◽  
Graphite Nanoplatelets ◽  
Mixture Concentration ◽  
Ft Ir ◽  
Exfoliated Graphite Nanoplatelets

The dehydration of polysaccharides fraction in the presence of acid catalysts, is a chemical process in which results as secondary product humic matter. In our work, the humic acid mixture was for the first time based on our knowledge extracted from defatted microalgae biomass rich in polysaccharides by standard alkali treatment, followed by precipitation at acidic pH. The dried humic acid mixture has been characterized using infrared spectroscopic measurements (FT-IR). Exfoliated graphite nanoplatelets (xGnP) were used as new adsorbents for this type of humic acids mixture, their adsorption being investigated. The effect of several parameters such as: contact time, concentration of humic acid mixture, concentration of xGnP, temperature and pH of the solutions were studied. The process of adsorption took place with good results, in the following conditions: at a concentration of humic acid mixture of 18.6 mg L-1, an xGnP amount of 0.01 mg in 25 mL of solution, at a temperature of 25 �� and at acidic pH values, in aqueous solution.

Exfoliated graphite modified with pyrolytic carbon

2014 ◽  
Vol 50 (4) ◽  
pp. 344-348 ◽  
Author(s):  
V. M. Ogenko ◽  
L. V. Dubrovina ◽  
O. V. Naboka ◽  
I. V. Dubrovin
Keyword(s):  
Pyrolytic Carbon ◽  
Exfoliated Graphite

Influence of the natural flake graphite particle size on the textural characteristic of exfoliated graphite used for heavy oil sorption

Carbon ◽  
2006 ◽  
Vol 44 (12) ◽  
pp. 2590-2592 ◽  
Author(s):  
F. Vieira ◽  
I. Cisneros ◽  
N.G. Rosa ◽  
G.M. Trindade ◽  
N.D.S. Mohallem
Keyword(s):  
Particle Size ◽  
Heavy Oil ◽  
Graphite Particle ◽  
Exfoliated Graphite ◽  
Flake Graphite ◽  
Textural Characteristic ◽  
Oil Sorption

Helium adsorption on exfoliated graphite

1975 ◽  
Vol 21 (3-4) ◽  
pp. 347-358 ◽  
Author(s):  
G. J. Goellner ◽  
J. G. Daunt ◽  
E. Lerner
Keyword(s):  
Exfoliated Graphite ◽  
Helium Adsorption
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