| Autor: |
Wojciechowski T; Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland., Rozmysłowska-Wojciechowska A; Faculty of Materials Science and Engineering , Warsaw University of Technology , Wołoska st. 141 , 02-507 Warsaw , Poland., Matyszczak G; Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland., Wrzecionek M; Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland., Olszyna A; Faculty of Materials Science and Engineering , Warsaw University of Technology , Wołoska st. 141 , 02-507 Warsaw , Poland., Peter A; Department of Chemistry and Biology , Technical University Cluj Napoca , Victor Babes 76 , Baia Mare , Romania., Mihaly-Cozmuta A; Department of Chemistry and Biology , Technical University Cluj Napoca , Victor Babes 76 , Baia Mare , Romania., Nicula C; Department of Chemistry and Biology , Technical University Cluj Napoca , Victor Babes 76 , Baia Mare , Romania., Mihaly-Cozmuta L; Department of Chemistry and Biology , Technical University Cluj Napoca , Victor Babes 76 , Baia Mare , Romania., Podsiadło S; Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland., Basiak D; Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland., Ziemkowska W; Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland., Jastrzębska A; Faculty of Materials Science and Engineering , Warsaw University of Technology , Wołoska st. 141 , 02-507 Warsaw , Poland. |
| Abstrakt: |
Among two-dimensional (2D) materials, such as graphene, a new family of 2D anisotropic carbides and nitrides of early transition metals (MXenes) is very interesting because of the potential applications in electronics, medicine, and photocatalysis. In this paper, preparation, morphostructural characterization, band gaps determination, and salicylic acid photodegradation ability of Ti 2 C MXene and six nanocomposites consisting of the MXene modified by TiO 2 , Ag 2 O, Ag, PdO, Pd, and Au are reported. It was confirmed using electron diffraction studies, energy dispersive X-ray spectroscopy, and high-resolution transmission microscopy that metals and metal oxides occur on the MXene flakes as nanoparticles in a shape of spots. The band gaps determined experimentally using Tauc's method are placed in the region of 0.90-1.31 eV. In recent years, the method of photocatalytic decomposition of pollutants using semiconductor photocatalysts and UV-vis energy has become increasingly important. The MXene based nanocomposites revealed high activity in the salicylic acid (SA) photodegradation reaction (86.1-97.1% of degraded SA after 3 h, concentration of SA initial solution 100 μM, the circulation rate of the SA solution 0.875 cm 3 /min). The interfacial charge transfer mechanism and the role of the metallic and metal oxide nanoparticles in the photocatalytic activity of the MXene based nanocomposites are presented and discussed. |
