Journal
NANOMATERIALS
Volume 10, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/nano10091747
Keywords
graphitic carbon nitride; hydrogen peroxide; modification; characterization
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Funding
- Czech Science Foundation [19-15199S]
- EUstructural funding in Operational Program Research, Development and Education [CZ.02.1.01/0.0/0.0/16_019/0000853]
- VSB-TU Ostrava [SP 2020/44, 2020/14]
- Large Research Infrastructure ENREGAT [LM2018098]
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Graphitic carbon nitride (GCN) was synthetized by heating melamine and then it was thermally exfoliated for 1-3 h in air. Both bulk and exfoliated GCN nanomaterials were treated in the 10-30% aqueous solutions of H2O2 for us to study their modification. The light absorption properties were observed by the reddish color and the red-shifts of their UV-Vis spectra. The content of oxygen increased and hydrogen peroxide was supposed to partially oxidize C-OH groups to C=O ones and to form C-O-C groups instead of edge C-NH-C ones. The GCN structure changes were not observed. However, a surface modification of the GCN materials was recognized by their changed photocatalytic activities tested by means of Acid Orange 7 (AO7) and Rhodamines B (RhB), zeta-potentials, and neutralization titration curves.
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