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<p>Tribocatalysis has emerged as a cutting-edge technology for treating wastewater with high concentration organic dyes, while potential secondary pollution from catalysts due to wear and tear has caused much concern. Presently, cost-effective and eco-friendly Fe<sub>2</sub>O<sub>3</sub> nanoparticles have been explored for tribocatalytic degradation of organic dyes, in which home-made Teflon magnetic rotary disks have been adopted in magnetic stirring, Ti and Al<sub>2</sub>O<sub>3</sub> disks have been coated separately on the bottoms of glass beakers. Suspended with Fe<sub>2</sub>O<sub>3</sub> nanoparticles in glass beakers with glass bottom, Ti and Al<sub>2</sub>O<sub>3</sub> coatings, 40&#xa0;mg/L Rhodamine B (RhB) was degraded by 40.9%, 98.6% and 99.7% after 4&#xa0;h of magnetic stirring, respectively; 20&#xa0;mg/L methyl orange (MO) was degraded by 66.4%, 95%, and 92.5% after 11&#xa0;h of magnetic stirring, respectively. According to EPR analyses, superoxide radicals generated by Fe<sub>2</sub>O<sub>3</sub> under magnetic stirring were substantially increased in the presence of Ti and Al<sub>2</sub>O<sub>3</sub> coatings. Given the eco-friendly and scalable nature of Ti and Al<sub>2</sub>O<sub>3</sub> coatings, these results demonstrate a promising strategy for eco-friendly natural mineral materials to utilize mechanical energy for large-scale environmental remediation.</p>

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Greatly enhanced tribocatalytic degradation of organic dyes by Fe2O3 nanoparticles through Ti and Al2O3 coatings

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • Xi Xu,
  • Chenyue Mao,
  • Senhua Ke,
  • Jiannan Song,
  • Yanhong Gu,
  • Najun Li,
  • Wanping Chen

摘要

Tribocatalysis has emerged as a cutting-edge technology for treating wastewater with high concentration organic dyes, while potential secondary pollution from catalysts due to wear and tear has caused much concern. Presently, cost-effective and eco-friendly Fe2O3 nanoparticles have been explored for tribocatalytic degradation of organic dyes, in which home-made Teflon magnetic rotary disks have been adopted in magnetic stirring, Ti and Al2O3 disks have been coated separately on the bottoms of glass beakers. Suspended with Fe2O3 nanoparticles in glass beakers with glass bottom, Ti and Al2O3 coatings, 40 mg/L Rhodamine B (RhB) was degraded by 40.9%, 98.6% and 99.7% after 4 h of magnetic stirring, respectively; 20 mg/L methyl orange (MO) was degraded by 66.4%, 95%, and 92.5% after 11 h of magnetic stirring, respectively. According to EPR analyses, superoxide radicals generated by Fe2O3 under magnetic stirring were substantially increased in the presence of Ti and Al2O3 coatings. Given the eco-friendly and scalable nature of Ti and Al2O3 coatings, these results demonstrate a promising strategy for eco-friendly natural mineral materials to utilize mechanical energy for large-scale environmental remediation.