Amino groups modified MnOx-PUF applied in indoor air purification:removing formaldehyde at room temperature

摘要

Indoor formaldehyde(HCHO)pollution has more and more serious adverse effects on human health,it is urgent to develop a material that can be embedded in the air purifier to achieve HCHO’s degradation efficiently.In this work,based on the carrier material of polyurethane foam(PUF)modified by amino groups diethanolamine(DEA),we propose a strategy to prepare a manganese oxide compound catalyst(DEA-MnOx-PUF).During the static testing(CHCHO:11.591 ppm,T:25℃),the catalyst shows higher HCHO removal efficiency(93.9%)than that of unmodified MnOx-PUF catalyst(88.6 %),and it achieves high HCHO-to-CO2 conversion(68.5 %).Additionally,during the continuous single-pass catalysis testing(C_(HCHO):11.591 ppm,T:25℃,240000 mL/(g_(cat)h)),HCHO removal efficiency can be maintained around at 95% within 50 hours.The excellent performance is attributed to the continuous decomposition of intermediates during the catalytic process by amino groups cross-linked on the surface of the catalyst.Based on the block whole MnOx-based catalyst DEA-MnOx-PUF,this work will provide a new route to develop a powerful purifier material with long-term efficient removal of HCHO.