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<p>The amorphous MnO<sub>x</sub> composite catalysts were successfully synthesized through a simple redox reaction, and then evaluated the degradation of formaldehyde (HCHO). The in-field plot test demonstrated that the F-1 exhibited a comparable or superior performance with a formaldehyde clean delivery rate (FCADR) of 52.4 m<sup>3</sup>&#xa0;h<sup>−1</sup> under the mild conditions of 25 ℃, 0.8–1.2&#xa0;ppm HCHO for 60&#xa0;min in a 30 m<sup>3</sup> stainless steel test chamber, in comparison with the commercial one. The excellent catalytic performance could be attributed to the high surface area beneficial for the exposure of active sites, the abundant oxygen vacancy responsible for rapid oxidation, and the good oxygen mobility and reducibility conducive to rapid electron transfer. Moreover, the excellent catalytic durability with a slight of deactivation even after a prolonged storage or in an extreme high temperature and humidity environment could provide a potential promising pathway for practical application in indoor air purification field.</p> Graphical abstract <p></p>

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Facile synthesis of amorphous MnOx composite for formaldehyde degradation in indoor air-purification

  • 期刊论文

  • 发表日期：

    2025年4月3日

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  • Yong Zhang,
  • Baodan Liu,
  • Qingshan Feng,
  • Yuhua Liu,
  • Sile Ren,
  • Meiting Lv,
  • Jianfeng Chen,
  • Yu Liu,
  • Ji Wang,
  • Liren Wang

摘要

The amorphous MnOx composite catalysts were successfully synthesized through a simple redox reaction, and then evaluated the degradation of formaldehyde (HCHO). The in-field plot test demonstrated that the F-1 exhibited a comparable or superior performance with a formaldehyde clean delivery rate (FCADR) of 52.4 m3 h−1 under the mild conditions of 25 ℃, 0.8–1.2 ppm HCHO for 60 min in a 30 m3 stainless steel test chamber, in comparison with the commercial one. The excellent catalytic performance could be attributed to the high surface area beneficial for the exposure of active sites, the abundant oxygen vacancy responsible for rapid oxidation, and the good oxygen mobility and reducibility conducive to rapid electron transfer. Moreover, the excellent catalytic durability with a slight of deactivation even after a prolonged storage or in an extreme high temperature and humidity environment could provide a potential promising pathway for practical application in indoor air purification field.

Graphical abstract