N-Containing Graphene Preparation Using Melamine as a Nitrogen Source
Ivanova N.M. Muldakhmetov Z.M. Vissurkhanova Y.A. Soboleva Y.A. Borsynbayev A.S.
27 June 2025E.A. Buketov Karaganda University Publish house
Eurasian Journal of Chemistry
2025#30Issue 274 - 84 pp.
N-doped graphene is not only a promising metal-free catalyst, but also a convenient carrier of metal nanopar-ticles for the creation of effective catalysts. Graphitic carbon nitride (g-C3N4) is used more often in photocata-lytic processes and less often as electrocatalysts. This paper describes the preparation of N-containing carbon composites consisting of reduced graphene oxide (rGO) and g-C3N4 for the further creation of metal-carbon catalytic systems. These composites were prepared by the heat treating dry mixtures of graphene oxide (GO) and melamine (MA) in the temperature range of 450–550 °C in air. Oxygen-containing groups were identi-fied in the graphene oxide samples synthesized by the modified Hummers method and in its reduced form. The thermogravimetric analysis method was used to determine the ranges of relative thermal stability of the GO + MA mixtures, which were found to be almost identical for the studied compositions with different component ratios. The structure of the graphene oxide and its composites with MA after heat treatment was studied by scanning electron spectroscopy, X-ray diffraction analysis, FTIR spectroscopy and elemental anal-ysis. The effect of the ratio of the initial components on the formation of the heat treatment products was de-termined. It was shown that to obtain the rGO+g-C3N4 composites with a high content of carbon nitride, the ratio of the initial reagents should be taken equal to 1:2, and the heat treatment should be carried out at 550 °C.
elemental content , graphene oxide , graphitic carbon nitride , heat treatment , melamine , oxygen-containing functional groups , reduced graphene oxide , “dry” preparation method
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LLP “Institute of Organic Synthesis and Coal Chemistry of the Republic of Kazakhstan”, Alikhanov Street, 1, Karaganda, 100000, Kazakhstan
Karaganda Buketov University, Universitetskaya street, 28, Karaganda, 100024, Kazakhstan
LLP “Institute of Organic Synthesis and Coal Chemistry of the Republic of Kazakhstan”
Karaganda Buketov University
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