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<p>The possibility of obtaining 2D GeH by mechanochemical treatment of bulk germanane in the presence of NaCl with subsequent sonochemical treatment and liquid-phase exfoliation has been demonstrated for the first time. It has been established that the preliminary mechanochemical nanostructuring of germanane promotes the formation of predominantly monolayer particles with a thickness of &lt;1 nm and a lateral size of up to 200 nm, and also leads to a red shift of the <i>E</i><sub>2<i>g</i></sub> mode in the Raman spectrum by 10 cm<sup>–1</sup>. It is shown that the dispersion of mechanochemically obtained germanane has three times higher photocatalytic activity in the hydrogen evolution reaction from an aqueous solution of lactic acid than the sample obtained without mechanochemical treatment.</p>

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Mechanochemical Preparation, Structure, and Spectral and Photocatalytic Properties of Graphene-Like Germanane

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • A. S. Kondratiuk,
  • V. G. Koshechko

摘要

The possibility of obtaining 2D GeH by mechanochemical treatment of bulk germanane in the presence of NaCl with subsequent sonochemical treatment and liquid-phase exfoliation has been demonstrated for the first time. It has been established that the preliminary mechanochemical nanostructuring of germanane promotes the formation of predominantly monolayer particles with a thickness of <1 nm and a lateral size of up to 200 nm, and also leads to a red shift of the E2g mode in the Raman spectrum by 10 cm–1. It is shown that the dispersion of mechanochemically obtained germanane has three times higher photocatalytic activity in the hydrogen evolution reaction from an aqueous solution of lactic acid than the sample obtained without mechanochemical treatment.