Hydrothermal synthesis of single-crystal Cr-doped SrTiO3 for efficient visible-light responsive photocatalytic hydrogen evolution | Zendy

Daixun Jiang | Zendy; Xun Sun | Zendy; Xilu Wu | Zendy; Liang Shi | Zendy; Fanglin Du | Zendy

Open Access

Hydrothermal synthesis of single-crystal Cr-doped SrTiO₃ for efficient visible-light responsive photocatalytic hydrogen evolution

Author(s) -

Daixun Jiang,

Xun Sun,

Xilu Wu,

Liang Shi,

Fanglin Du

Publication year - 2019

Publication title -

materials research express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.383

H-Index - 35

ISSN - 2053-1591

DOI - 10.1088/2053-1591/ab660d

Subject(s) - x ray photoelectron spectroscopy , materials science , photocatalysis , visible spectrum , raman spectroscopy , photocurrent , hydrothermal circulation , scanning electron microscope , dielectric spectroscopy , analytical chemistry (journal) , spectroscopy , absorption spectroscopy , hydrothermal synthesis , doping , chemical engineering , electrochemistry , optoelectronics , optics , chemistry , electrode , biochemistry , physics , chromatography , quantum mechanics , engineering , composite material , catalysis

Visible-light-driven Cr-doped SrTiO 3 nanocubes were successfully synthesized by hydrothermal method in alkaline KOH conditions. X-ray diffraction spectroscopy (XRD), Raman spectra, x-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to characterize the samples, and the Cr-doped SrTiO 3 possess cubic morphology with about 30–50 nm in size, and single-crystal feature. In addition, the Cr-doped SrTiO 3 extended light-harvesting properties to visible-light region which was testified by UV–vis absorption spectra, and excellent charge transfer and separation efficiency were approved by photo fluorescence spectra (PL), electrochemical impedance spectroscopy (EIS) and photocurrent response measurements. Among the synthesized photocatalysts, SrTiO 3 nanocubes doped with 2% Cr by molar ratio exhibits the highest photocatalytic activity, achieving 11.66 μ mol of H 2 evolution during 5 h visible-light irradiation. This study provides a facile and effective way to enhance the performance of SrTiO 3 -based photocatalysts.

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