SYNTHESIS OF MODIFIED NANOCARBON MATERIALS AND DETERMINATION OF THEIR ADSORPTION CAPACITY (original) (raw)

2020, International Journal of Mechanical and Production Engineering Research and Development

In this work, thermally expanded graphite and carbonized rice husk were obtained by heat treatment at different temperature conditions and different ratios. The samples were purified and characterized by physico-chemical methods. The synthesized samples were tested as oil sorbents in water. The results of determination of sorption capacity of thermally expanded graphite oil showed higher values (5-6%) compared to carbonized rice husks (3.1-3.7%). It should be noted that all samples of thermally expanded graphite have an adsorption capacity at least three times greater than that of natural graphite. The process of carbonization of rice husks was carried out at 600, 700, 800 and 900°C. It was found for samples of carbonized rice husks that the adsorption capacity was maintained in the range of 3.1-3.7% and no special changes were detected which depends upon activation temperature. The results of electron microscopic examination showed that the process of carbonization does not significantly change the macroscopic morphology of rice husks. In general, it is concluded that the carbonization process leads to an increase in the adsorption capacity of samples.