Synthesis of new carbon-nitrogen composites based on waste sweet drinks
 
More details
Hide details
1
Adam Mickiewicz University in Poznań, Faculty of Chemistry, Laboratory of Applied Chemistry
CORRESPONDING AUTHOR
Piotr Nowicki   

Adam Mickiewicz University in Poznań, Faculty of Chemistry, Laboratory of Applied Chemistry
Publication date: 2019-09-09
 
Physicochem. Probl. Miner. Process. 2019;55(6):1366–1374
 
KEYWORDS
TOPICS
ABSTRACT
The materials under investigation were new carbon-nitrogen composites obtained via pyrolysis and CO2 activation of sweet drinks destined for utilization. Waste Pepsi Cola® has been examined as an alternative and renewable carbon source for composite materials. Nitrogen was introduced into the Pepsi Cola® solution via the addition of guanidine carbonate, before the pyrolysis process. The physicochemical properties of the materials studied were characterized by low- temperature nitrogen adsorption (using BET and BJH methods), elemental analysis, FTIR spectroscopy, scanning electron microscopy (SEM) as well as determination of pHPZC and the number of surface functional groups. Additionally, thermal properties of the samples were investigated by thermogravimetric analysis (TG) and differential thermogravimetry (DTG). The final products were new carbon-nitrogen composites characterized by a very high content of nitrogen (11.2 - 21.6 wt.%) as well as relatively low surface area and pore volume reaching 198 m2/g and 0.16 cm3/g, respectively. Results of FT-IR study and Boehm titration indicated that the composites surface has clearly basic character, which was confirmed by pHpzc values above 8.0.
eISSN:2084-4735
ISSN:1643-1049