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<p>The synthesis by precipitation method of a ZnS hybrid photocatalyst functionalized with monoethanolamine in a MEA-water solution for its application in photocatalytic hydrogen production was investigated in this research work. The functionalization of ZnS with MEA as an organic component in the hybrid photocatalyst greatly modified the structural, textural, and optical properties of ZnS. With different MEA ratios in the reaction medium, these properties were enhanced. The specific surface area is augmented up to 150 m<sup>2</sup>/g, and the hybrid photocatalyst exhibited an optical response in the visible spectrum. Moreover, the crystallite size was affected by the incorporation of the MEA molecule. However, the photocatalytic efficiency is significantly improved due to the role of the MEA molecule in facilitating electron transfer, which favors electron–hole separation and consequently reduces the recombination rate. The most active photocatalyst showed a hydrogen evolution rate of almost 7900&#xa0;μmol g<sub>cat</sub><sup>−1</sup>&#xa0;h<sup>−1</sup>. The high photocatalytic performance was attributed to its large surface area, crystallite size, and the incorporation of MEA molecules as the organic component in the hybrid photocatalyst.</p>

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Optimization of ZnS synthesis through the incorporation of monoethanolamine (MEA) for the efficient photocatalytic production of H2

  • 期刊论文

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  • 发表日期：

    2025年4月7日

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  • Cinthia-García Mendoza,
  • J. I. Rodríguez Arias,
  • Getsemani Morales-Mendoza,
  • Socorro Oros-Ruiz,
  • David Garcia-Zaleta,
  • Dora María Frías Márquez,
  • Ruth Lezama García,
  • Rosendo López-González

摘要

The synthesis by precipitation method of a ZnS hybrid photocatalyst functionalized with monoethanolamine in a MEA-water solution for its application in photocatalytic hydrogen production was investigated in this research work. The functionalization of ZnS with MEA as an organic component in the hybrid photocatalyst greatly modified the structural, textural, and optical properties of ZnS. With different MEA ratios in the reaction medium, these properties were enhanced. The specific surface area is augmented up to 150 m2/g, and the hybrid photocatalyst exhibited an optical response in the visible spectrum. Moreover, the crystallite size was affected by the incorporation of the MEA molecule. However, the photocatalytic efficiency is significantly improved due to the role of the MEA molecule in facilitating electron transfer, which favors electron–hole separation and consequently reduces the recombination rate. The most active photocatalyst showed a hydrogen evolution rate of almost 7900 μmol gcat−1 h−1. The high photocatalytic performance was attributed to its large surface area, crystallite size, and the incorporation of MEA molecules as the organic component in the hybrid photocatalyst.