Direct Synthesis of Porous Multilayer Graphene Materials Using Thermal Plasma at Low Pressure

Ravil Amirov,Alexander Tyuftyaev,Nariman Alihanov,Marina Shavelkina,Natalya Vorob’Eva,Evgeny Shkolnikov

doi:10.1155/2015/724508

Ravil Amirov, Alexander Tyuftyaev + Show 4 more

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https://doi.org/10.1155/2015/724508

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Abstract

Porous multilayer graphenes have been synthesized by decomposition of hydrocarbons in a thermal plasma jet. Products of synthesis were characterized by electron microscopy, thermogravimetry, Raman spectroscopy, and X-ray diffraction. Possibility of producing a wide range of graphene materials with different morphology and structure has been shown. Influence of the experimental conditions on mesopores structure of the synthesis products has been investigated using the method of “limited evaporation.”

Highlights

Surface area and porosity of the catalyst are essential for catalysis
The porous structure of the graphene materials synthesized by use of the thermal plasma jet has not been investigated earlier
Depending on the type of plasma gas, pressure and flow rate of plasma gas, and flow rate of propane-butane mixture, morphology of the synthesis products varies from crumpled structure to large flakes with a transverse dimension of 600 nm

Summary

Introduction

Surface area and porosity of the catalyst are essential for catalysis. The existence of macropores, mesopores, and micropores on the surface of solids affects their adsorption, diffusion, and capillary and mechanical properties depending on the porosity and determines the specifics of particular adsorptive and catalytic processes. Recently developed template method of synthesis using mesoporous silica allows producing materials with required pore size and ordered structure. This method has several disadvantages, such as multistage, use of a large amount of expensive and corrosive chemicals, and large amount of liquid waste [1]. Our purpose was to study the possibility of obtaining mesoporous graphene nanomaterials by decomposition of hydrocarbons in a plasma jet reactor, so that those nanomaterials on one hand would have a developed specific surface and on the other hand a minimal share of micropores, the presence of which in the catalyst, as known, is not desirable. The porous structure of the graphene materials synthesized by use of the thermal plasma jet has not been investigated earlier

Experimental Procedures

Results

Conclusions

Conflict of Interests