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<p>Sr₂CeO₄ photocatalyst powders were synthesized via a solution combustion method, and those ones were doped with Nd³⁺ concentrations from 0.25 to 3&#xa0;mol%. The X-ray diffraction analysis confirmed orthorhombic crystal phases for all the samples. The analysis by microscopy revealed an increase in particle size and amorphous shapes as the Nd³⁺ concentration increases. In particular, the sample synthesized with 0.75% of Nd³⁺ showed the smallest crystallite size of 29.5&#xa0;nm. UV-Vis absorbance spectra indicated enhanced absorption with Nd doping. The band gap of the photocatalytic powders decreased from 2.77 to 2.11&#xa0;eV as the content of Nd<sup>3+</sup> increases from 0 to 3&#xa0;mol%. While Sr₂CeO₄ has been widely studied for organic degradation, its application in hydrogen production remains unexplored. Thus, in this work, it was demonstrated that the optimum concentration of Nd<sup>3+</sup> was to produce a maximum hydrogen generation of 40 µmol/g.</p>

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Nd-doped Sr₂CeO₄ photocatalyst powders and their utilization for hydrogen generation

  • 期刊论文

  • 发表日期：

    2025年12月17日

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  • Jesús Alberto López Valdez,
  • Oscar Iván Gómez Zavala,
  • David Alejandro Chávez Campos,
  • Carlos Eduardo Rodríguez García,
  • Luis Armando Díaz Torres,
  • Efraín Viesca Villanueva,
  • Jorge Oliva

摘要

Sr₂CeO₄ photocatalyst powders were synthesized via a solution combustion method, and those ones were doped with Nd³⁺ concentrations from 0.25 to 3 mol%. The X-ray diffraction analysis confirmed orthorhombic crystal phases for all the samples. The analysis by microscopy revealed an increase in particle size and amorphous shapes as the Nd³⁺ concentration increases. In particular, the sample synthesized with 0.75% of Nd³⁺ showed the smallest crystallite size of 29.5 nm. UV-Vis absorbance spectra indicated enhanced absorption with Nd doping. The band gap of the photocatalytic powders decreased from 2.77 to 2.11 eV as the content of Nd3+ increases from 0 to 3 mol%. While Sr₂CeO₄ has been widely studied for organic degradation, its application in hydrogen production remains unexplored. Thus, in this work, it was demonstrated that the optimum concentration of Nd3+ was to produce a maximum hydrogen generation of 40 µmol/g.