锰氧化物室温催化降解甲醛的研究及应用

Research and application on catalytic degradation of formaldehyde by manganese oxide at room-temperature

甲醛气体作为室内的主要污染物之一,严重侵害着人类的身体健康,目前已被世界卫生组织列为致癌和致畸性物质。室温催化降解技术是在室温条件下将甲醛气体完全降解为CO_(2)和H_(2)O且无需提供额外能量,是一种适合应用于家居环境的除醛技术。锰的氧化物由于其价态多变、资源丰富、价格低廉以及优异的催化性能等,常被应用于催化降解甲醛的研究中。在本文中,通过氧化还原沉淀法合成了δ-MnO_(2)催化剂,并探讨了其催化降解甲醛活性和机理,最终将其应用在空调产品中,实现对空间甲醛气体的去除净化功能。

Formaldehyde(HCHO),one of the main indoor pollutants,has been listed as carcinogenic and teratogenic substances by the World Health Organization,which poses a serious threat on human health.The catalytic technologies for HCHO removal at room temperature can fully degrade HCHO into CO_(2)and H_(2)O without additional energy,which is suitable for HCHO removal in home environment.Because of its variable valence state,abundant resources,low price and excellent catalytic performance,manganese oxide is often used in the study of catalytic degradation of HCHO.In this paper,δ-MnO_(2) catalyst was synthesized by REDOX precipitation method,and its catalytic activity and mechanism of HCHO degradation were discussed.Finally,it was applied in air conditioning products to achieve the purification of HCHO in room.