Research on Hydrothermal Decoration of TiO₂ Nanotube Films with Nanoplatelet MoS₂ Species

Abstract

In this study, novel electrodes were prepared via decoration of nanotubed TiO 2 (TiNT) films with crystalline twodimensional (2D) MoS 2 species by a one-step hydrothermal synthesis approach. Obtained products were characterized in detail by scanning electron microscopy, Raman spectroscopy, U-I measurements and X-ray diffraction techniques. The influence of hydrothermal synthesis conditions on the composition and morphology of the products formed in the solution and within the TiNT film are also discussed. For the first time, acceptable decoration of TiNT films, by tethering 2D layered MoS 2 leaflets onto the TiO 2 nanotubes, and on the film surface was obtained in the low concentration solutions, while the performance of these heterostructures in relation to electrochemical hydrogen evolution reaction (HER) was tested. Stable catalytic activity of the obtained 2D MoS 2-in-TiNT films was demonstrated under intense HER conditions within the potential window [-0.2 to-0.4 V] vs. RHE with a notably low Tafel slope of 33 mV/ decade.

Fabrication of Hierarchical Nanocomposites through a Nature-Mimic Method: Depositing MoS2 Nanoparticles on Carbon Nitride Nanotubes by Polydopamine Coating

“…According to PDF card no. 01-075-1539, the main diffraction peaks which were presented at 2theta 14.10°, 32.89°, 33.68°, 39.50°, and 58.73°matched well with the (002), (100), (101), (103), and (110) planes, respectively, attributable to MoS 2 [38], which were also showed in the spectra of MoS 2 -PDA-CNNT composites.…”