The role of guanidine hydrochloride in graphitic carbon nitride synthesis

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Abstract

Graphitic carbon nitride (CN) was synthesized from guanidine hydrochloride (G), melamine (M) and dicyandiamide (DCDA). The CN materials synthetized from the pure precursors and their mixtures were characterized by common methods, including thermal analysis, and their photocatalytic activities were tested by the degradation of selected organic pollutants, such as amoxicillin, phenol, Rhodamine B (RhB). Remarkable changes in their texture properties in terms of particle sizes, specific surface areas (SSA) and consequently their photocatalytic activity were explained by the role of guanidine hydrochloride in their synthesis. The SSA increased due to the release of NH3 and HCl and its complex reactions with melamine and DCDA forming structure imperfections and disruptions. The photocatalytic activity of the CN materials was found to be dependent on their SSA.

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Smýkalová, A., Foniok, K., Cvejn, D., Górecki, K. M., & Praus, P. (2021). The role of guanidine hydrochloride in graphitic carbon nitride synthesis. Scientific Reports, 11(1). https://doi.org/10.1038/s41598-021-01009-8

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