Abstract:
Indoor formaldehyde is harmful to the environment and the human health , thus it becomes important to reduce formaldehyde. The Ce
xZr
1−xO
y catalyst was prepared for formaldehyde removal by co-precipitation method and characterized by XRD, SEM, N
2 adsorption-desorption and XPS to investigate the activity of catalytic formaldehyde with different cerium-zirconium molar ratio. The results showed that the formaldehyde with a concentration of 1.5mg/m
3 could be catalytic oxidized by the Ce
0.8Zr
0.2O
y catalyst at room temperature, the removal rate maintained at 100% within 200 min and remained above 85% after 12 h of continuous reaction, and retained at 97% after five regeneration tests. Combined with the physicochemical characterization analysis, the Ce species can change the morphological structure of the catalyst, bring more chemical adsorbent oxygen, and then improve the performance of the catalyst. The reason for catalyst deactivation is that water and carbonate species occupy the active sites, block the pore and consume the active components.