Enhanced photocatalytic activity of mechanically synthesized GdFe1−xCrxO3


Kenges K. Orazov Z. Baláž M. Tugova E.
March 2025Elsevier B.V.

Inorganic Chemistry Communications
2025#173

Herein, we present a novel approach for the preparation of orthoferrite solid solution through direct mechanochemical synthesis and compare them with samples synthesized by the conventional solid-state method. Results obtained show the formation of an orthorhombic perovskite structure of GdFe1−xCrxO3 during ball milling at 500 rpm for 4 h. A study of the formation mechanism reveals that after 15 min of mechanical activation, GdFeO3 is the first to form, and subsequent mechanical treatment for 4 h promotes the introduction of chromium into the crystalline structure of GdFeO3. The samples synthesized by mechanochemical activation demonstrated the strongest photocatalytic activity for the degradation of rhodamine-B (RhB) dye under simulated solar light irradiation of intensity (15 mW/cm2). The photodecomposition rate of RhB was improved about 6 times using samples obtained by mechanochemical synthesis compared to orthoferrite samples synthesized by the solid-state method. This enhanced photocatalytic activity was demonstrated to originate from superoxide O2•- radicals and singlet oxygen 1O2, which demonstrated synergetic effects with activated •OH radicals via a Fenton-like reaction. These findings underscore the potential of mechanochemical synthesis for advanced photocatalytic materials and emphasize the importance of understanding synthesis-route-dependent properties to harness the full potential of rare earth orthoferrites.

Fenton reaction , Gadolinium orthoferrites , Mechanochemical synthesis , Photocatalysis

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Center of Physical-Chemical Methods of Research and Analysis, Al-Farabi Kazakh National University, Almaty, 050012, Kazakhstan
Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, Košice, 04001, Slovakia
Ioffe Institute, 26 Politekhnicheskaya, St Petersburg, 194021, Russian Federation

Center of Physical-Chemical Methods of Research and Analysis
Institute of Geotechnics
Ioffe Institute

10 лет помогаем публиковать статьи Международный издатель

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