摘要
以金属阳离子为前驱体,以粒径3~5 mm的Al2O3小球为载体,制备出了一种Mn-Ce-Pr/Al2O3三元体系催化剂,并研究了不同制备条件下催化剂对1%苯酚溶液的臭氧催化氧化性能。通过场发射扫描电镜(SEM)、热重分析仪(TGA)、X射线衍射仪(XRD)、比表面积测定仪(BET)和表面电荷滴定等方法对催化剂的理化性质进行了表征。结果表明,反应温度550℃时,会生成一层稳定的多孔金属氧化层(Mn2O3、CeO2以及Pr2O3),该氧化层的滞后环属于典型的H2型,但是过高的焙烧温度会使催化剂表面的晶体出现板结和塌陷现象,降低催化剂的比表面积,催化效率下降。
In this paper,a Mn-Ce-Pr/Al2O3ternary system catalyst was prepared with metal cation as precursor and Al2O3 pellets with particle size of 3~5 mm as the carrier.The physical and chemical properties of the catalyst were characterized by means of field emission scanning electron microscope(SEM),thermogravimetric analyzer(TGA),X-ray diffractometer(XRD),specific surface area meter(BET)and surface charge titration.The results show that a stable porous metal oxide layer(Mn2O3,CeO2 and Pr2O3)was formed when the reaction temperature was 550℃.The hysteresis ring of the oxide layer belonged to the typical H2 type.However,excessive roasting temperature would lead to the phenomenon of crystal hardening and collapse on the catalyst surface,which reduced the specific surface area of the catalyst and decreased the catalytic efficiency.
作者
张平
项军
李重阳
程鹏高
张建平
唐娜
ZHANG Ping;XIANG Jun;LI Chongyang;CHENG Penggao;ZHANG Jianping;TANG Na(College of Chemical Engineering and Materials Science,Tianjin University of Science&Technology,Tianjin 300457,China;TianjinKey Laboratory of Brine Chemical Industry and Ecological Utilization of Resources,Tianjin 300457,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2020年第9期9091-9097,共7页
Journal of Functional Materials
基金
教育部科研创新团队培育计划资助项目(IRT-17R81)
天津市高等学校创新团队培养计划资助项目(TD13-5008)。
