Electrophoretic deposition and characterization of self-doped SrTiO3 thin films

Abstract

Herein, Ti +3 self-doped SrTiO 3 so-called blue SrTiO 3 with a bandgap of 2.6 eV and favorable photocatalytic characteristics was fabricated by a facile and effective method. For electrochemical investigations, the electrophoretic deposition was applied to produce SrTiO 3 thin films on FTO conductive substrates. The electrophoretic voltage of 20 V and the process duration of 10 min were optimized to reach transparent and uniform coatings on FTO. The blue SrTiO 3 reveals lower resistance (the charge transfer resistance of 6.38 Ω cm-2) and higher electron mobility (the current density value of 2 0.25 mA cm-2) compared to pure SrTiO 3 electrode. These findings may provide new insights for developing high-performance visible light photocatalysts.

Ultra-fast synthesis of the high performance photocatalytic Ti3+ self-doped strontium titanate by an electrochemical assist in molten salt: effect of electrochemical potential

“…With the increase in electrolysis potential, the colors of the three samples gradually changed from grayish blue to dark blue, which further indicated Ti 3+ doping and an increase in Ti 3+ content leading to an increase in oxygen vacancies in the samples. 19 The band gap values were calculated from the UV-vis absorption spectra using eqn (4): 29 ( αhν ) 1/ n = A ( hν − E g )where α , hν , A , and E g are the absorption coefficient, the photon energy, the proportionality constant, and the band gap, respectively. The index n is directly related to the type of semiconductor, n = 1/2 for SrTiO 3 .…”

“…With the increase in electrolysis potential, the colors of the three samples gradually changed from grayish blue to dark blue, which further indicated Ti 3+ doping and an increase in Ti 3+ content leading to an increase in oxygen vacancies in the samples. 19 The band gap values were calculated from the UV-vis absorption spectra using eqn (4): 29 (ahn…”

“…18 Aydemir et al prepared Ti 3+ self-doped SrTiO 3 films with a thickness of 2 μm in 24 h by combining hydrothermal and electrodeposition methods. 19 Atkinson et al used at least 72 h to prepare porous nanoporous N-doped SrTiO 3 . 20 Tian et al used the hydrothermal method to prepare Al-doped SrTiO 3 of 20–50 nm, which needed a 24 hours experimental reaction time.…”

Tunable Photocatalytic Activity of CoFe Prussian Blue Analogue Modified SrTiO3 Core–Shell Structures for Solar-Driven Water Oxidation

“…As previously detailed, the synthesis of bSTO powder was accomplished via a solid-state reaction involving NaBH 4 and crystalline STO . To elaborate briefly, 25 mmol of STO powder was combined with 25 mmol of NaBH 4 and ground together in an agate mortar.…”

“…As previously detailed, the synthesis of bSTO powder was accomplished via a solid-state reaction involving NaBH 4 and crystalline STO. 46 To elaborate briefly, 25 mmol of STO powder was combined with 25 mmol of NaBH 4 and ground together in an agate mortar. This mixture was subsequently placed in a porcelain boat and subjected to heating in a tube furnace under an Ar + /H 2 atmosphere.…”