One-pot hydrothermal synthesis of carbonaceous spheres with variable sizes from aqueous monosaccharides solutions

Abstract

We investigated the synthesis of carbonaceous spheres(CSs) via hydrothermal hydrolysis of aqueous solution of monosaccharides (glucose and fructose) in closed system. Different synthesis parameters such as temperature, reaction time, and sugar concentration are important for tuning the diameter of the CSs. In addition, control over the size of the CSs can be achieved using acetic acid as a size-determining agent. The results show that important differences have been observed between both glucose and fructose derived CSs. For the production of well defined CSs the hydrothermal hydrolysis of fructose show lower reaction temperature and shorter reaction time if compared with hydrothermal hydrolysis of glucose. The particle sizes, however, are smaller when glucose is utilized as source of the CSs.

Morphological effect on electrochemical performance of nanostructural CrN*

“…Preparation of Cr 2 O 3 precursor (i) The microspheres Cr 2 O 3 precursor was synthesized by a modified hydrothermal method. [19] Briefly, 0.8-mmol glucose and 0.1-mmol Cr(NO 3 ) 3 •9H 2 O were dissolved in 40-ml and 20-ml deionized water, respectively. The two solutions were then mixed and placed in 100 ml of teflon liner coated with a stainless steel autoclave.…”