Meruyert Nazhipkyzy

Creation Based on Superhydrophobic Soot Waterproofing Materials Obtained in Flames

In this paper we present a study of the formation of soot, which has the properties of the superhydrophobic surface of a silicon substrate. Found that the soot content in the putty from 1 to 8% increase in the hydrophobic properties of plaster.

Synthesis of single-layer graphene in benzene–oxygen flame at low pressure

ABSTRACT The results of investigations on synthesis of single-layer graphene on nickel substrate in the flame of premixed benzene–oxygen mixture at the pressure of 45 Torr with and without application of electric potential direct current of positive and negative polarity are presented. It is stated that at low pressure in benzene–oxygen flame, single-layer graphene is synthesized with minimum defects ID/IG = 0.27. The temperature of substrate 900°C and exposure time 0.5–1 min are sufficient for synthesis of single-layer graphene. It is shown that application of electric potential to the substrate influences synthesis of graphene in the flame. It is stated that at negative and positive potentials on a nickel substrate, formation of single-layer graphene is observed, at the value of negative potential U = −2V on a nickel substrate, one can observe formation of defectless single-layer graphene (ID/IG ≈ 0).

Synthesis of Porous Carbon Material and its Use for Growing Carbon Nanotubes

The scales of porous carbon materials usage are constrained by their considerably high cost. Therefore, development of new methods for production of porous carbon with the necessary complex of properties from cheap raw materials is actual. Also, porous carbon materials can be used for growth of carbon nanotubes as a matrices of catalyst particles. Herein, the method of fabrication porous carbon materials from waste of oil industry and their use as a matrices of catalyst particles to growth of CNT was developed. CNTs was synthesized by CVD using as hydrocarbon source - propan-butane gas mixture, as catalyst - Ni particles at 650°C, 700°C, 750°C, 800°C. Obtained carbon materials was investigated by Raman spectroscopy and by scanning electron microscope. Investigations on the properties of the obtained porous materials show soot particles sedimented in pores reduce well nanoparticles of metals from salts which act as nuclei for the growth of multiwall carbon nanotubes during pyrolysis of hydrocarbons by CVD method.