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<p>It is a great challenge to achieve high degradation activity and excellent stability of efficient immobilizing muti-component catalyst systems. Herein, a homogeneous pre-solution involving hydrolyzed tetrabutyl titanate and cellulose alkaline/urea solution were proposed to achieve highly dispersed TiO<sub>2</sub> in cellulose microspheres via in-situ mineralization. The partially exposed TiO<sub>2</sub> nanoparticles could act as the anchor points for further mineralizing goethite (FeOOH) with the assistance of tannic acid. As a result, the well-designed TiO<sub>2</sub>/FeOOH binary catalyst system immobilized on the porous cellulose aerogels exhibited broadened light response range and enhanced charge transfer efficiency. The removal ratio of tetracycline (TC) for TiO<sub>2</sub>/FeOOH immobilized microspheres (TFMS) was over 87.8% in 40&#xa0;min via photo-Fenton degradation. More importantly, TFMS maintained the degradation efficiency over 83.0% after 5 rounds degradation, while the removal ratio of TC on microsphere immobilized only with FeOOH was reduced to 24.3%. This design of anchor structure on an immobilized catalyst system provides a new strategy to balance the stability and active site exposure of multi-component catalyst systems for efficient and safe water treatment.</p>

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Structuring binary catalysts anchored on cellulose aerogel for photo-Fenton degradation

  • 期刊论文

  • 发表日期：

    2025年12月3日

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  • Jin-Long Zhu,
  • Jia-Cheng Lv,
  • Shi-Peng Chen,
  • Jia-Zhuang Xu,
  • Gan-ji Zhong,
  • Ling Xu,
  • Hua-Dong Huang,
  • Zhong-Ming Li

摘要

It is a great challenge to achieve high degradation activity and excellent stability of efficient immobilizing muti-component catalyst systems. Herein, a homogeneous pre-solution involving hydrolyzed tetrabutyl titanate and cellulose alkaline/urea solution were proposed to achieve highly dispersed TiO2 in cellulose microspheres via in-situ mineralization. The partially exposed TiO2 nanoparticles could act as the anchor points for further mineralizing goethite (FeOOH) with the assistance of tannic acid. As a result, the well-designed TiO2/FeOOH binary catalyst system immobilized on the porous cellulose aerogels exhibited broadened light response range and enhanced charge transfer efficiency. The removal ratio of tetracycline (TC) for TiO2/FeOOH immobilized microspheres (TFMS) was over 87.8% in 40 min via photo-Fenton degradation. More importantly, TFMS maintained the degradation efficiency over 83.0% after 5 rounds degradation, while the removal ratio of TC on microsphere immobilized only with FeOOH was reduced to 24.3%. This design of anchor structure on an immobilized catalyst system provides a new strategy to balance the stability and active site exposure of multi-component catalyst systems for efficient and safe water treatment.