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<p>The present study discusses the synthesis of a ternary SnO<sub>2</sub>/Fe<sub>3</sub>O<sub>4</sub>/CoAl-LDH (SFL) nanohybrid via co-precipitation. The synthesized nanohybrid achieved ~ 100% and ~ 99.9% degradation efficacy for RB and VB, respectively, in 60&#xa0;min under sunlight irradiation. The pseudo-first-order rate constants for RB and VB dyes were 0.13938&#xa0;min<sup>−1</sup> and 0.12397&#xa0;min<sup>−1</sup>. The combination of CoAl-LDH (LDH) and Fe<sub>3</sub>O<sub>4</sub> (FO) with SnO<sub>2</sub> leads to an enhancement of harvesting ability. The wide band gap of SnO<sub>2</sub> (~ 3.6&#xa0;eV) limits its visible light activity; incorporation of CoAl-LDH and Fe<sub>2</sub>O<sub>3</sub>/Fe<sub>3</sub>O<sub>4</sub> narrows the effective optical band gap of the resulting SFL composite to 2.88&#xa0;eV, substantially extending its photoresponse into the visible region. The reusability cycle showed that, even after five successive cycles, the nanomaterial exhibited effective degradation rates of 83.9% (RB) and 77.65% (VB). Hence, this investigation is cost-effective and has the potential for long-term usage of the nanohybrid. The effects of pH, reaction kinetics, catalyst dosage, dye concentration, contact time, water matrices, inorganic ions, organic ions, and scavengers on dye degradation were also examined. In addition, several characterization tools were used, including XPS, XRD, SEM, TEM, EDX, FTIR, PL, UVDRS, LC–MS, VSM, BET, and SAED, to characterise the morphology and properties of the synthesized nanoparticles.</p>

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High efficiency of novel magnetic SnO2/Fe3O4/CoAl-LDH nanohybrid for degradation of dyes

  • 期刊论文

  • 发表日期：

    2026年8月5日

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  • Khushboo Kumari,
  • N. Shaemningwar Moyon,
  • Mohammed Ahmaruzzaman

摘要

The present study discusses the synthesis of a ternary SnO2/Fe3O4/CoAl-LDH (SFL) nanohybrid via co-precipitation. The synthesized nanohybrid achieved ~ 100% and ~ 99.9% degradation efficacy for RB and VB, respectively, in 60 min under sunlight irradiation. The pseudo-first-order rate constants for RB and VB dyes were 0.13938 min−1 and 0.12397 min−1. The combination of CoAl-LDH (LDH) and Fe3O4 (FO) with SnO2 leads to an enhancement of harvesting ability. The wide band gap of SnO2 (~ 3.6 eV) limits its visible light activity; incorporation of CoAl-LDH and Fe2O3/Fe3O4 narrows the effective optical band gap of the resulting SFL composite to 2.88 eV, substantially extending its photoresponse into the visible region. The reusability cycle showed that, even after five successive cycles, the nanomaterial exhibited effective degradation rates of 83.9% (RB) and 77.65% (VB). Hence, this investigation is cost-effective and has the potential for long-term usage of the nanohybrid. The effects of pH, reaction kinetics, catalyst dosage, dye concentration, contact time, water matrices, inorganic ions, organic ions, and scavengers on dye degradation were also examined. In addition, several characterization tools were used, including XPS, XRD, SEM, TEM, EDX, FTIR, PL, UVDRS, LC–MS, VSM, BET, and SAED, to characterise the morphology and properties of the synthesized nanoparticles.