利用浸渍法在羧基化聚丙烯（PP）非织造布表面负载氧化锰（MnO_χ），制备一种降解低浓度臭氧的整体式催化剂，并对常温下臭氧的降解性能进行研究。扫描电镜、红外光谱和比表面积等分析表明，MnO_χ不仅具有介孔孔道，而且能够均匀分布在PP非织造布表面。同时考察了MnO_χ负载量、相对湿度等对催化臭氧的活性影响，结果表明，在MnO_χ负载量为24.46%、相对湿度为20%、臭氧初始质量浓度为2 mg/m³时，该催化剂在连续反应12 h后仍能维持100%的臭氧转化率。该整体式催化剂具有较低的压降，在去除空气中低浓度臭氧方面具有良好的应用潜力。

An integrated catalyst for decomposition of ozone is synthesized by supporting manganese oxides (MnO_χ) catalyst on carboxylic-functionalized polypropylene nonwoven through impregnation method.The activity of the catalyst is studied in the catalytic decomposition of ozone under room temperature.The structure morphologies,surface chemical compositions and mesoporous of the catalyst are characterized by SEM,ATR-FTIR and BET.It is found that MnO_χ has mesoporous channels distributing evenly on the surface of polypropylene nonwovens.The effects of MnO_χ loading amount and relative humidity on the activity of the catalyst is investigated.The results indicate the catalyst can keep ozone conversion at 100% after 12 h continuous reaction at room temperature under conditions that MnO_χ loading amount is 24.46 wt%,inlet ozone concentration is 2 mg·m^-3 and relative humidity is 20%.This integrated catalyst exhibits a low pressure drop and shows good promising for the removal of low level ozone in the air.

董宇(1990-),男,硕士研究生,主要从事空气净化材料的研究,1471915322@qq.com