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<p>In order to effectively alleviate the environmental pressure, in this paper, FeTi/C nanomaterials were prepared by microwave-catalysed pyrolysis of PVC pretreated with dechlorination using homemade FeTiO<sub>x</sub> catalysts and applied in the field of phenol degradation. The dechlorinated pre-treated PVC contains only 0.41 wt% chlorine. Pre-treated PVC was mixed with FeTiO<sub>x</sub> catalyst and placed in 800&#xa0;W microwave field for pyrolysis, and it was found that the FeTiO<sub>x</sub> catalyst containing low-valent iron oxide after hydrogen reduction promoted the microwave pyrolysis process more easily than the FeTiO<sub>x</sub> catalyst containing only high-valent iron oxide, which could increase the mixture from room temperature to 700&#xa0;°C in a very short period of time. As the reduction temperature of the FeTiO<sub>x</sub> catalyst increased from 450&#xa0;°C to 900&#xa0;°C, its particle size gradually increased and the microwave absorption heating rate accelerated synchronously; meanwhile, the titanium dioxide (TiO₂) phase was gradually formed in the system, the microscopic morphology of the pyrolytic carbon was consequently transformed from highly graphitized carbon nanotubes to low-graphitized onion-like carbon and carbon flakes, and the carbon yield decreased from 36.5 wt% to 26 wt%. The obtained FeTi/C nanomaterials efficiently degraded phenol in the water with high degradation rates of 93.08%-96.42% in 60&#xa0;min, indicating that the synthesised FeTi/C nanomaterials have potential applications in organic wastewater.</p>

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PVC Dechlorination-Microwave-assisted FeTiOx Catalytic Pyrolysis for the Preparation of FeTi/C Nanomaterials and Applications

  • 期刊论文

  • 发表日期：

    2026年2月27日

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  • Guangxiong Ji,
  • Bingguo Liu,
  • Guolin Luo,
  • Chao Yuwen,
  • Fang Peng,
  • Siyu Gong,
  • Wang Chen,
  • Keren Hou,
  • Zhenxing Yang,
  • Yuhao Jin

摘要

In order to effectively alleviate the environmental pressure, in this paper, FeTi/C nanomaterials were prepared by microwave-catalysed pyrolysis of PVC pretreated with dechlorination using homemade FeTiOx catalysts and applied in the field of phenol degradation. The dechlorinated pre-treated PVC contains only 0.41 wt% chlorine. Pre-treated PVC was mixed with FeTiOx catalyst and placed in 800 W microwave field for pyrolysis, and it was found that the FeTiOx catalyst containing low-valent iron oxide after hydrogen reduction promoted the microwave pyrolysis process more easily than the FeTiOx catalyst containing only high-valent iron oxide, which could increase the mixture from room temperature to 700 °C in a very short period of time. As the reduction temperature of the FeTiOx catalyst increased from 450 °C to 900 °C, its particle size gradually increased and the microwave absorption heating rate accelerated synchronously; meanwhile, the titanium dioxide (TiO₂) phase was gradually formed in the system, the microscopic morphology of the pyrolytic carbon was consequently transformed from highly graphitized carbon nanotubes to low-graphitized onion-like carbon and carbon flakes, and the carbon yield decreased from 36.5 wt% to 26 wt%. The obtained FeTi/C nanomaterials efficiently degraded phenol in the water with high degradation rates of 93.08%-96.42% in 60 min, indicating that the synthesised FeTi/C nanomaterials have potential applications in organic wastewater.