Graphitization of flax shive cellulose modified by citric acid: properties of magnetic composites and their dye adsorption capacity

Magnetic composites were synthesized in an inert medium within the temperature range T = 500-1000 degrees C by one-stage pyrolysis of microcrystalline flax shive cellulose modified by citric acid (MCCA) and homogeneously impregnated with Fe(NO3)(3). Catalytic graphitization was studied by the thermogravimetric analysis method. The crystal structure, pore development, morphological structure and surface chemistry of carbon composites were characterized by the N-2 adsorption-desorption, XRD, SEM and FTIR methods. The onset temperature of MCCA graphitization was found to be equal to 600 degrees C. The magnetic carbon materials were tested as adsorbents for removal of anionic methyl orange (MO) and cationic methylene blue (MB) dyes. The highest equilibrium adsorption capacity in MB and MO was found in the magnetic composites synthesized at 700 and 800 degrees C.

Automated summary

In this study, magnetic composites were successfully synthesized and characterized for their structure and adsorption performance. The magnetic composites synthesized at different temperatures showed the highest adsorption capacity for methyl orange and methylene blue dyes.