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<p>Layered double hydroxides (LDHs) are considered promising photocatalytic materials for the efficient removal of heavy metals like Cr(VI), a toxic metal commonly present in industrial wastewater. In this context, a practical way to do that is by applying a photocatalytic process to reduce Cr(VI) previously adsorbed in LDH materials to non-toxic Cr(III). This work aimed to obtain a hybrid ZnFeAl material with a better charge transfer efficiency by the in-situ incorporation of Fe(II, III) during the synthesis by the co-precipitation method, to decrease the electron–hole recombination rate and improve the photoreduction reaction of Cr(VI) to Cr(III). The synthesized ZnAl and ZnFeAl LDH materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), physisorption of nitrogen, UV–vis DRS analysis, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and photoelectrochemical techniques.</p>

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Exploring the formation of ZnFeAl hybrid materials by in situ incorporation of Fe(II,III) to ZnAl LDHs and its remarkable efficiency to Cr(VI) photoreduction in water

  • 期刊论文

  • 发表日期：

    2025年11月19日

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  • Guadalupe Romero-Ortiz,
  • Francisco Tzompantzi,
  • Luis Lartundo-Rojas,
  • Héctor A. Calderón,
  • Michelle Navarrete-Magaña,
  • David Ramírez-Ortega,
  • José Enrique Samaniego-Benítez,
  • Angeles Mantilla

摘要

Layered double hydroxides (LDHs) are considered promising photocatalytic materials for the efficient removal of heavy metals like Cr(VI), a toxic metal commonly present in industrial wastewater. In this context, a practical way to do that is by applying a photocatalytic process to reduce Cr(VI) previously adsorbed in LDH materials to non-toxic Cr(III). This work aimed to obtain a hybrid ZnFeAl material with a better charge transfer efficiency by the in-situ incorporation of Fe(II, III) during the synthesis by the co-precipitation method, to decrease the electron–hole recombination rate and improve the photoreduction reaction of Cr(VI) to Cr(III). The synthesized ZnAl and ZnFeAl LDH materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), physisorption of nitrogen, UV–vis DRS analysis, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and photoelectrochemical techniques.