Issue 15, 2018

Synergistic effect of Ti3+ doping and facet regulation over Ti3+-doped TiO2 nanosheets with enhanced photoreactivity

Abstract

Ti3+-doped TiO2 nanosheets with different percentages of exposed {001} facets were synthesized by aluminium (Al) reduction. The structure, crystallinity, morphology, and other properties of the as-prepared samples were characterized by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy and X-ray photoelectron spectroscopy. Electron paramagnetic resonance spectra confirm the presence of paramagnetic Ti3+ species in the prepared Ti3+-doped TiO2. Under UV-visible light irradiation, all the Al-reduced TiO2 nanosheet samples exhibit higher photocatalytic hydrogen evolution, degradation of methyl orange (MO) and photoelectrochemical (PEC) performance than the non-reduced ones. The Al-TiO2-HF6 sample with the highest Ti3+ concentration and optimal exposed {001} facets exhibits the most excellent photoreactivity, which is mainly ascribed to the efficient transport and separation of photo-induced charge carriers resulting from the synergistic effects between Ti3+ doping and facet regulation.

Graphical abstract: Synergistic effect of Ti3+ doping and facet regulation over Ti3+-doped TiO2 nanosheets with enhanced photoreactivity

Supplementary files

Article information

Article type
Paper
Submitted
18 May 2018
Accepted
29 Jun 2018
First published
04 Jul 2018

Catal. Sci. Technol., 2018,8, 3876-3882

Synergistic effect of Ti3+ doping and facet regulation over Ti3+-doped TiO2 nanosheets with enhanced photoreactivity

X. Liu and Y. Bi, Catal. Sci. Technol., 2018, 8, 3876 DOI: 10.1039/C8CY01016A

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