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<p>Fe(III)-Schiff base/layered double hydroxide (Fe(III)-SB/LDH); LDH is prepared via co-precipitation method, the Schiff base (SB) was prepared from 2-aminopyridine and salicylaldehyde by refluxing equimolar amount of both compounds followed by simple method of modification with Fe(III)-SB on LDH by stirring and employed as catalyst for the removal of anionic dye methyl orange (MO). Characterization of Fe(III)-SB/LDH (MLDH) revealed that LDH is surface coated with Fe(III)-SB, where layers of LDH remain intact with a two-fold increase in surface area. MLDH catalyzed the degradation of methyl orange (MO) dye without peroxide or photon, suggesting that the degradation process is through the production of singlet oxygen or enzyme-like catalytic behavior. Under optimized conditions i.e., amount of synthesized material 10.0&#xa0;mg at pH 6 using dye concentration of 12.5&#xa0;mg/L (10 mL solution) and contact time of 30&#xa0;min in continuous stirring mode, MLDH can degrade 96% of MO dye. MLDH for MO makes it a promising adsorbent for the removal of organic anionic dyes.</p>

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Nanostructured Ni-Al–(Fe(III) Schiff’s Base) Layered Double Hydroxide for Efficient Removal of Methyl Orange Dye

  • 期刊论文

  • 发表日期：

    2026年4月21日

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  • Sidra Khan,
  • Najma Memon,
  • Saima Q. Memon,
  • Yilmaz Yurekli

摘要

Fe(III)-Schiff base/layered double hydroxide (Fe(III)-SB/LDH); LDH is prepared via co-precipitation method, the Schiff base (SB) was prepared from 2-aminopyridine and salicylaldehyde by refluxing equimolar amount of both compounds followed by simple method of modification with Fe(III)-SB on LDH by stirring and employed as catalyst for the removal of anionic dye methyl orange (MO). Characterization of Fe(III)-SB/LDH (MLDH) revealed that LDH is surface coated with Fe(III)-SB, where layers of LDH remain intact with a two-fold increase in surface area. MLDH catalyzed the degradation of methyl orange (MO) dye without peroxide or photon, suggesting that the degradation process is through the production of singlet oxygen or enzyme-like catalytic behavior. Under optimized conditions i.e., amount of synthesized material 10.0 mg at pH 6 using dye concentration of 12.5 mg/L (10 mL solution) and contact time of 30 min in continuous stirring mode, MLDH can degrade 96% of MO dye. MLDH for MO makes it a promising adsorbent for the removal of organic anionic dyes.