Preparation of high specific surface area MnxZr1-xOy catalyst and its catalytic oxidation effect of formaldehyde at room temperature
Formaldehyde,as one of the indoor air pollutants,produces irreversible harm to the human body.Therefore,the removal efficient of formaldehyde has become one of the research hotspots.In this study,MnxZr1-xOy catalysts with different activities were obtained by the co-precipitation method,and the materials were characterized by XRD,FT-IR,SEM,TEM,BET,XPS and O2-TPD.Effect of different manganese-zirconium molar ratios for the catalytic oxidation of formaldehyde at room temperature were evaluated.The results showed that catalytic oxidation effect of formaldehyde by Mn0.67Zr0.33Oy obtained from manganese and zirconium at a molar ratio of 2:1 was the best,with the removal rate of formaldehyde reaching 100％,and the catalytic activity was above 90％after 50 h of reaction.The characterization results showed that the Mno.67Zr0.33Oy catalyst possessed the largest specific surface area(215.1 m2·g-1),which increases the contact area between the gas and the catalyst,and high surface-activated oxygen and high valence Mn content are the main reasons for the excellent performance of the catalysts.
MnxZr1-xOyformaldehydecatalytic oxidationroom temperature
国家科技期刊平台
NSTL
万方数据
