Solid Sr2Ti1-xMnxO4 (x = 0; 0,01; 0,025; 0,05; 0,1) solutions with K2NiF4 structure

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Solid of Sr 2 Ti 1- x MnxO 4 (x = 0; 0.01; 0.025; 0.05; 0.1) solutions with Raddlesden-Popper structure ( An+1 BnO 3 n +1, n = 1, structural type K2NiF4 ) were obtained by a precursor technology. Formate complexes of the corresponding metals synthesized by an original method were used as precursors. The products of thermolysis of the obtained complexes with an organic ligand are isostructural single-phase samples, which crystallize as agglomerates with an average size of 1 μm. Using energy dispersive X-ray analysis, we established a uniform distribution in the agglomerates of Sr 2+, Ti 4+ and Mn 4+. According to electron spin resonance and optical spectroscopy, manganese in titanium-oxygen polyhedra of Sr 2 Ti 1- x MnxO 4 is predominantly in oxidation degree 4+. Increasing the concentration of manganese in the solid solution composition effectively narrows the forbidden band width of strontium titanate from 3.5 eV to 2.5 eV for Sr 2 Ti 0,9 Mn0,1O 4. The catalytic properties Sr 2 Ti 1- x MnxO 4 were analyzed in the oxidation reaction of hydroquinone under irradiation of its aqueous solutions in the ultraviolet and visible spectral ranges. Under the described conditions, all photocatalysts showed a high rate of photooxidation. It was found that the photocatalytic activity of Sr 2 Ti 1- x MnxO 4 in 3 consecutive cycles of photooxidation under infrared stimulation exceeds the commercial catalyst Degussa P25 by 4 times.

About the authors

Tatiana I. Chupakhina

Institute of Solid State Chemistry of the Ural Branch of RAS

Ph. D., Senior Researcher, Laboratory of Inorganic Synthesis, Institute of Solid State Chemistry

Anastasia M. Uporova

Institute of Solid State Chemistry of the Ural Branch of RAS

Email: nastyauporova99@gmail.com
Ph. D. student, Junior Researcher, Laboratory of Inorganic Synthesis, Institute of Solid State Chemistry

Olga I. Gyrdasova

Institute of Solid State Chemistry of the Ural Branch of RAS

Ph. D., Leading Researcher, Laboratory of Inorganic Synthesis, Institute of Solid State Chemistry

Larisa Yu. Buldakova

Institute of Solid State Chemistry of the Ural Branch of RAS

Ph. D., Senior Researcher Laboratory of Physicochemical Analysis, Institute of Solid State Chemistry

Yulia A. Deeva

Institute of Solid State Chemistry of the Ural Branch of RAS

Ph. D., Research Associate, Laboratory of Inorganic Synthesis, Institute of Solid State Chemistry

Inna V. Baklanova

Institute of Solid State Chemistry of the Ural Branch of RAS

Ph. D., Senior Researcher, Laboratory of quantum chemistry and spectroscopy, Institute of Solid State Chemistry

Mikhail Yu. Yanchenko

Institute of Solid State Chemistry of the Ural Branch of RAS

Ph. D., Senior Researcher, Laboratory of Physicochemical Analysis, Institute of Solid State Chemistry

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