Graphitic Carbon Nitride as a Platform for the Synthesis of Silver Nanoclusters

Nanoscale Research Letters

Vlastimil Matějka¹  Martin Koštejn²  Petr Praus³  Halyna Starukh⁴ 

[1] Department of Chemistry, Faculty of Materials Science and Technology, VSB-Technical University of Ostrava, 17. listopadu 15, 708 00, Ostrava-Poruba, Czech Republic;Institute of Chemical Process Fundamentals, Czech Academy of Science, Rozvojová 1, 165 02, Prague, Czech Republic;Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. listopadu 15, 70800, Ostrava-Poruba, Czech Republic;Department of Chemistry, Faculty of Materials Science and Technology, VSB-Technical University of Ostrava, 17. listopadu 15, 708 00, Ostrava-Poruba, Czech Republic;Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. listopadu 15, 70800, Ostrava-Poruba, Czech Republic;Department of Chemistry, Faculty of Materials Science and Technology, VSB-Technical University of Ostrava, 17. listopadu 15, 708 00, Ostrava-Poruba, Czech Republic;Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, General Naumov Street 17, 03164, Kyiv, Ukraine;

关键词: Graphitic carbon nitride;    Silver nanoclusters;    Synthesis;    Photocatalysis;    Ofloxacin;   

DOI  :  10.1186/s11671-021-03621-z

来源: Springer

【 摘 要 】

Graphitic carbon nitride (CN) synthetized by the thermal polycondensation of melamine at 550 °C for 4 h was further exfoliated by heating at 500 °C for 3 h. Silver cations were adsorbed on the exfoliated graphitic carbon nitride (CNE) and then reduced by sodium borohydride forming silver nanoclusters (NCs) with a size of less than 1 nm. The NCs were located on the CNE surface and did not change the CNE properties except for its pore size distribution and thereby specific surface area (SSA). The Ag NCs were able to collect the photoinduced electrons of CNE and thus reduce their recombination with the holes. It was also documented by the increase in the CNE photocatalytic activity in terms of the degradation of antibiotic Ofloxacin. This study demonstrates the ability of CNE to serve as a platform for a simple and fast synthesis of Ag NCs without any stabilizing compounds.Graphic Abstract

【 授权许可】

CC BY