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<p>In this study, M-FeCO<sub>3</sub> (M = Ni, Co, Zn) layered double hydroxide (LDH) was synthesized <i>via</i> a co-precipitation method and systematically characterised to evaluate their multifunctional performance in environmental remediation and solar energy applications. Structural analysis (XRD, FTIR, TEM, SEM with EDS, BET, UV-Vis, and XPS) confirmed well-ordered layered structures with high crystallinity, minimal defects, spherical like morphology, average particle size (5–15&#xa0;nm), large specific surface areas (31.01-101.41 m<sup>2</sup>/g), tunable band gaps (1.98–2.50&#xa0;eV), which enable superior charge separation. XPS analysis revealed the presence of Ni<sup>2+</sup>, Co<sup>2+</sup>/Co<sup>3+</sup>, Zn<sup>2+,</sup> and Fe<sup>3+</sup> species with strong M-O bonding in the synthesized LDH materials. Among the catalysts, ZnFe-LDH achieved complete sonophotocatalytic degradation of azo (BBY), triarylmethane (MG), and xanthene (EY) dyes, while exhibiting excellent reusability by retaining the high MG dye degradation efficiency over the three successive cycles. Radical scavenging and fluorescence studies confirmed <sup>•</sup>OH and O<sub>2</sub><sup>•−</sup> as the dominant reactive oxygen species (ROS). Simultaneously, the synthesized LDH was incorporated as a photoanode in dye sensitized solar cell (DSSC), where ZnFe-LDH achieved a maximum photovoltaic efficiency of 3.06% attributed to its tunable band gap, higher surface area, and reduced recombination resistance. The integrated high performance in both sonophotocatalysis pollutant degradation and DSSC application underscores the multifunctional character of the LDHs materials. This dual use capability emphasizes their potential as sustainable, low-cost materials for integrated environmental remediation and solar energy conversion, aligning with green chemistry and circular-economy targets.</p>

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M-FeCO3 (M = Ni, Co, Zn) Layered Double Hydroxides: A Multifunctional Materials for Enhanced Dye Sensitized Solar Cell and Advanced Oxidation Performance

  • 期刊论文

  • 发表日期：

    2026年6月19日

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  • Anjali Kumari,
  • Savita Soni,
  • Anupam Sharma,
  • Ajay Sharma,
  • Vivek Sheel,
  • Shashi Kant Bhatia,
  • Ranbir Singh,
  • Anil Kumar Sharma

摘要

In this study, M-FeCO3 (M = Ni, Co, Zn) layered double hydroxide (LDH) was synthesized via a co-precipitation method and systematically characterised to evaluate their multifunctional performance in environmental remediation and solar energy applications. Structural analysis (XRD, FTIR, TEM, SEM with EDS, BET, UV-Vis, and XPS) confirmed well-ordered layered structures with high crystallinity, minimal defects, spherical like morphology, average particle size (5–15 nm), large specific surface areas (31.01-101.41 m2/g), tunable band gaps (1.98–2.50 eV), which enable superior charge separation. XPS analysis revealed the presence of Ni2+, Co2+/Co3+, Zn2+, and Fe3+ species with strong M-O bonding in the synthesized LDH materials. Among the catalysts, ZnFe-LDH achieved complete sonophotocatalytic degradation of azo (BBY), triarylmethane (MG), and xanthene (EY) dyes, while exhibiting excellent reusability by retaining the high MG dye degradation efficiency over the three successive cycles. Radical scavenging and fluorescence studies confirmed •OH and O2•− as the dominant reactive oxygen species (ROS). Simultaneously, the synthesized LDH was incorporated as a photoanode in dye sensitized solar cell (DSSC), where ZnFe-LDH achieved a maximum photovoltaic efficiency of 3.06% attributed to its tunable band gap, higher surface area, and reduced recombination resistance. The integrated high performance in both sonophotocatalysis pollutant degradation and DSSC application underscores the multifunctional character of the LDHs materials. This dual use capability emphasizes their potential as sustainable, low-cost materials for integrated environmental remediation and solar energy conversion, aligning with green chemistry and circular-economy targets.