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<p>In this study, we report for the first time that methyl orange (MO) dye can be efficiently adsorbed using functionalized multi-walled carbon nanotubes (MWCNTs) decorated with mesoporous titanium dioxide (MTiO<sub>2</sub>) and nickel ferrite (NiFe<sub>2</sub>O<sub>4</sub>). The addition of MWCNTs to the TiO<sub>2</sub>/NiFe<sub>2</sub>O<sub>4</sub> composite significantly enhanced the dye adsorption capacity. Notably, the adsorption efficiency varied with the MWCNT content, with the (MTiO<sub>2</sub>/NiFe<sub>2</sub>O<sub>4</sub>)/70 wt.%MWCNT nanocomposite exhibiting the highest activity. After 120 min, this nanocomposite achieved 98% methyl orange removal, which is approximately 1.8 times more effective than the (MTiO<sub>2</sub>/NiFe<sub>2</sub>O<sub>4</sub>)/40 wt.% MWCNT composite, and nearly two orders of magnitude higher than the binary MTiO<sub>2</sub>/NiFe<sub>2</sub>O<sub>4</sub> composite without MWCNTs. Furthermore, the nanocomposite can be regenerated and reused through photodegradation under ultraviolet (UV) irradiation. Overall, the excellent performance of the MTiO<sub>2</sub>/NiFe<sub>2</sub>O<sub>4</sub>/MWCNT composite in removing methyl orange demonstrates its potential as a reusable system for dye removal, paving the way for further application of MWCNT-based materials in water purification.</p> Graphical Abstract <p></p>

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Facile synthesis of Mesoporous TiO2/NiFe2O4 nanocomposite integrated on MWCNTs for contaminated water treatment

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • Alireza Ziaei-Abiz,
  • S. A. Hassanzadeh-Tabrizi,
  • Ali Saffar,
  • Reza Ebrahimi-Kahrizsangi,
  • Mahdi Omidi

摘要

In this study, we report for the first time that methyl orange (MO) dye can be efficiently adsorbed using functionalized multi-walled carbon nanotubes (MWCNTs) decorated with mesoporous titanium dioxide (MTiO2) and nickel ferrite (NiFe2O4). The addition of MWCNTs to the TiO2/NiFe2O4 composite significantly enhanced the dye adsorption capacity. Notably, the adsorption efficiency varied with the MWCNT content, with the (MTiO2/NiFe2O4)/70 wt.%MWCNT nanocomposite exhibiting the highest activity. After 120 min, this nanocomposite achieved 98% methyl orange removal, which is approximately 1.8 times more effective than the (MTiO2/NiFe2O4)/40 wt.% MWCNT composite, and nearly two orders of magnitude higher than the binary MTiO2/NiFe2O4 composite without MWCNTs. Furthermore, the nanocomposite can be regenerated and reused through photodegradation under ultraviolet (UV) irradiation. Overall, the excellent performance of the MTiO2/NiFe2O4/MWCNT composite in removing methyl orange demonstrates its potential as a reusable system for dye removal, paving the way for further application of MWCNT-based materials in water purification.

Graphical Abstract