Influence of Cu and W Incorporation on the Surface Morphology of MgFe-Layered Double Hydroxides | ||
| Damanhour Journal of Pure and Applied Sciences | ||
| Articles in Press, Corrected Proof, Available Online from 07 November 2025 PDF (1.05 M) | ||
| Document Type: Research Article | ||
| DOI: 10.21608/djpas.2025.431693.1001 | ||
| Authors | ||
| Gehan Ahmed El-Naggar1; Aya Mohamed Kosba* 1; Hussein A. Khalaf1; Elmaghraby Mohamed Elmaghraby2 | ||
| 1Chemistry department, faculty of science, Damanhour university, Al Buhayrah, Egypt | ||
| 2Physics department, faculty of science, Damanhour university, Al Buhayrah, Egypt | ||
| Abstract | ||
| Mg/Fe LDH with molar ratio 2/1 and their transition metal-based modification (Cu and W) with molar ratio (1/1/1) for both are prepared. The materials obtained were characterized by TGA, XRD, SEM and BET techniques to reveal structural information regarding both the parent and modified LDH materials. The obtained results revealed multistage mass losses corresponding to dehydration, dehydroxylation, and carbonate decomposition, with the W/Mg/Fe-LDH exhibiting the highest thermal stability and largest residual mass, while Cu/Mg/Fe-LDH showed accelerated decomposition. XRD patterns confirmed the formation of well-crystallized hydrotalcite-like structures with rhombohedral symmetry (R-3m). Metal substitution markedly increased crystallite size from 9.9 nm (Mg/Fe-LDH) to 62.7 nm (Cu/Mg/Fe-LDH) and 70.6 nm (W/Mg/Fe-LDH), indicating enhanced structural ordering. SEM images showed that pristine Mg/Fe-LDH consisted of irregular, loosely packed platelets, whereas Cu and W incorporation produced more compact and uniform morphologies—Cu leading to flake-like aggregates and W yielding dense, spherical nanostructures. N₂ adsorption–desorption analyses indicated type IV isotherms with mesoporous characteristics. The pristine Mg/Fe-LDH exhibited the highest surface area (87 m²/g) and pore volume (0.086 cm³/g), while Cu substitution drastically reduced these values (14 m²/g and 0.015 cm³/g), suggesting pore blocking and densification. The W/Mg/Fe-LDH maintained moderate porosity (38 m²/g, 0.050 cm³/g) with improved pore uniformity. Overall, metal substitution significantly influenced the structural, morphological, and textural features of Mg/Fe-LDHs—Cu decreased porosity and thermal stability, whereas W enhanced crystallinity, stability, and mesoporous structure—highlighting their potential for catalysis and adsorption applications. | ||
| Keywords | ||
| LDH; Textural properties; Porosity; Morphology | ||
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