Structural properties of carbon microspheres obtained by hydrothermal treatment of fructose

Abstract

A carbon-rich solid product has been synthesized by hydrothermal treatment from fructose with HNO3 at temperature of 140°C. The concentration of the precursor was changed in order to investigate how its change influences formation of carbon microspheres. pH value for every sample was the same, i.e. 1. The formation of the carbon rich solid through the hydrothermal carbonization of fructose is the consequence of dehydration reactions. Obtained carbon material is made of spherical micrometer-sized particles with the diameter in the 1-6 µm range, which can be modulated by modifying the concentration of fructose in solution. The best results are obtained with smaller concentrations of fructose. Spherical particles have more regular shape and they are less agglomerated. The structure and surface chemical properties of obtained material were characterized by scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectra and elemental analysis.

Čvrsti proizvod bogat ugljenikom je sintetizovan hidrotermičkim tretmanom fruktoze sa HNO3 na temperaturi od 140 °C. Koncentracija prekursora bila je menjana da bi se istražilo kako njegova promena utiče na formiranje mikrosfere atoma. pH vrednost za svaki uzorak bila je isti 1. Formiranje čvrstog proizvoda bogatog ugljenikom preko hidrotermičke karbonizacije fruktoze posledica je dehidracionih reakcija. Dobijeni ugljeni materijal izrađen je od sfernih čestica veličine prečnika od 1 do 6 µm, koji se može modulisati promenom koncentracije fruktoze u rastvoru. Najbolji rezultati se dobijaju sa manjim koncentracijama fruktoze. Sferne čestice imaju više pravilan oblik i oni su manje aglomerisane. Strukture i površinske hemijske osobine dobijenog materijala su sagledavane skeniranjem elektronskim mikroskopom (SEM) , FTIR-om i spektralnim i elementarnim analizama.