首页|Ti-modification enhanced the activity of flexible mesh-type Mn/?-Al2O3/Al catalyst for indoor HCHO removal under humid conditions

Ti-modification enhanced the activity of flexible mesh-type Mn/?-Al2O3/Al catalyst for indoor HCHO removal under humid conditions

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  • NSTL
  • Elsevier
Nowadays, MnO2-based catalysts have been widely applied in environmental fields, especially the removal of HCHO at room temperature. However, the moisture resistance of the catalyst is still a challenge. In this study, a series of MnTix/gamma-Al2O3/Al catalysts were prepared by the methods of redox precipitation and impregnation, which showed excellent HCHO removal efficiency under humid conditions. When the catalyst accumulatively treated ca. 25 ppm of HCHO, there was still a HCHO conversion of 87.5% and the activity can be restored by washing and drying. DFT calculations, XPS, and TG results showed that Ti-modification could inhibit the adsorption of physisorbed water on the catalyst surface, thereby weakening the competitive adsorption between H2O and HCHO. This study provides a feasible strategy for the removal of HCHO under humid conditions.

Titanium modificationMnO2Formaldehyde decompositionRelative humidityROOM-TEMPERATURE OXIDATIONBIRNESSITE-TYPE MNO2ONE-STEP SYNTHESISFORMALDEHYDE OXIDATIONMANGANESE OXIDEINCORPORATED MANGANESEAIRBORNE FORMALDEHYDECO OXIDATIONDECOMPOSITIONCU

Xie, Zukun、Xia, Qingyuan、Ji, Lei、Shu, Qingli、Zhang, Qi、Du, Ping

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East China Univ Sci & Technol

Minist Ecol & Environm

2022

10.1016/j.apcata.2022.118638

Applied Catalysis

Applied Catalysis

ISSN：0926-860X
年,卷(期)：2022.639
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