Construction of Spindle-Shaped Ti³⁺ Self-Doped TiO₂ Photocatalysts Using Triethanolamine-Aqueous as the Medium and Its Photoelectrochemical Properties.

ABSTRACT: To enhance the utilization efficiency of visible light and reduce the recombination of photogenerated electrons and holes, spindle-shaped TiO₂ photocatalysts with different Ti³⁺ concentrations were fabricated by a simple solvothermal strategy using low-cost, environmentally friendly TiH₂ and H₂O₂ as raw materials and triethanolamine-aqueous as the medium. The photocatalytic activities of the obtained photocatalysts were investigated in the presence of visible light. X-ray diffraction (XRD), Raman spectra, transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FT-IR) spectra were applied to characterize the structure, morphologies, and chemical compositions of as-fabricated Ti³⁺ self-doped TiO₂. The concentration of triethanolamine in the mixed solvent plays a significant role on the crystallinity, morphologies, and photocatalytic activities. The electron-hole separation efficiency was found to increase with the increase in the aspect ratio of as-fabricated Ti³⁺ self-doped TiO₂, which was proved by transient photocurrent response and electrochemical impedance spectroscopy.

SUBMITTER: Hu Z 

PROVIDER: S-EPMC9268407 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature