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<p>A seven-cation layered double hydroxide with the composition MgNiCoAlFeYGd was obtained by soft mechanochemical synthesis followed by hydrothermal treatment. The crystal phase purity of the sample was confirmed by X-ray diffraction, and the unit cell parameters were calculated. Sorption and UV-photocatalytic properties were studied using the model dye methyl orange (MO). Oxidative properties were evaluated using the 3,3′,5,5′-tetramethylbenzidine (TMB) test. The valence state of cobalt was investigated by X-ray absorption near edge spectroscopy (XANES). The synthesized sample demonstrated oxidative activity toward TMB, as well as photocatalytic and sorption activity toward MO. According to the obtained results, cobalt contained in the sample is partially oxidized to the +3 oxidation state, which remains stable after the TMB test.</p>

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Properties of seven-cation MgNiCoAlFeYGd layered double hydroxide obtained by soft mechanochemical synthesis

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • E. S. Seliverstov,
  • E. V. Khramov,
  • O. E. Lebedeva

摘要

A seven-cation layered double hydroxide with the composition MgNiCoAlFeYGd was obtained by soft mechanochemical synthesis followed by hydrothermal treatment. The crystal phase purity of the sample was confirmed by X-ray diffraction, and the unit cell parameters were calculated. Sorption and UV-photocatalytic properties were studied using the model dye methyl orange (MO). Oxidative properties were evaluated using the 3,3′,5,5′-tetramethylbenzidine (TMB) test. The valence state of cobalt was investigated by X-ray absorption near edge spectroscopy (XANES). The synthesized sample demonstrated oxidative activity toward TMB, as well as photocatalytic and sorption activity toward MO. According to the obtained results, cobalt contained in the sample is partially oxidized to the +3 oxidation state, which remains stable after the TMB test.