Size control of the photo-electrochemical water splitting activity of SrTiO^sub 3^ nano-cubes

Size control of the photo-electrochemical activity of a n-semiconductor oxide in water oxidation was demonstrated on size and shape controlled SrTiO3 nano-cubes featuring homogeneous {100} oriented surface. The carbonate free SrTiO3 perovskite nano-cubes were synthesized from titanium(IV) bis(ammoni...

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Published inElectrochimica acta Vol. 297; p. 215
Main Authors Klusáčková, Monika, Nebel, Roman, Macounová, Kateřina Minhová, Klementová, Mariana, Krtil, Petr
Format Journal Article
LanguageEnglish
Published Oxford Elsevier BV 20.02.2019
Subjects
Blue shift
Cubes
Gelatin
Oxidation
Perovskites
Strontium titanates
Water splitting
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Summary:Size control of the photo-electrochemical activity of a n-semiconductor oxide in water oxidation was demonstrated on size and shape controlled SrTiO3 nano-cubes featuring homogeneous {100} oriented surface. The carbonate free SrTiO3 perovskite nano-cubes were synthesized from titanium(IV) bis(ammonium lactato)dihydroxide solution and strontium nitrate in presence of the structure ordering gelatin. The gelatin content determines the size of the perovskite nano-cubes in the range 10–30 nm SrTiO3 nano-cubes show band gap in the range 3.2–3.3 eV with slight blue shift of the absorption edge for nano-cubes smaller than 20 nm. All materials are active in photo-electrochemical water splitting, their specific activity, however, decreases with decreasing particle size and drop exponentially for nano-cubes smaller than 20 nm.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2018.11.185