• Ziemkowska, Wanda
• Nicula, Camelia
• Basiak, Dariusz
• Jastrzębska, Agnieszka
• Peter, Anca
• Podsiadło, Sławomir
• Mihaly-Cozmuta, Leonard
• Mihaly-Cozmuta, Anca
• Wrzecionek, Michał
• Olszyna, Andrzej
• Wojciechowski, Tomasz
• Matyszczak, Grzegorz
• Rozmysłowska-Wojciechowska, Anita

Abstract

Among 2D materials, such as graphene, new family of two-dimensional anisotropic carbides and nitrides of early transition metals (MXenes) is very interesting because of the potential applications in electronics, medicine and photocatalysis. In the paper, preparation, morpho-structural characterization, band gaps determination and salicylic acid (SA) photodegradation ability of Ti2C MXene and six nanocomposites consisting of the MXene modified by TiO2, Ag2O, Ag, PdO, Pd and Au were reported. It was confirmed using electron diffraction studies (EDS), energy dispersive X-ray spectroscopy (EDX) and high resolution transmission microscopy (HRTEM) 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 SA photodegradation reaction (86.1-97.1% of degraded SA after 3h, concentration of SA initial solution 100μM, the circulation rate of the SA solution 0.875 cm3/min). The interfacial charge transfer mechanism and a role of the metallic and metal oxide nanoparticles in the photocatalytic activity of the MXene based nanocomposites were presented and discussed

Topics

• nanoparticle
• nanocomposite
• impedance spectroscopy
• electron diffraction
• semiconductor
• nitride
• carbide
• anisotropic
• two-dimensional
• Energy-dispersive X-ray spectroscopy
• interfacial
• decomposition
• microscopy