Thermal stabilization of ordered mesoporous alumina with modification of rare earth

摘要：

The synthesis of organized mesoporous alumina has exploring new territory for application of this type of materials, particularly as catalysts or catalyst supports. High specific surface area and thermal stability are the major requirements for alumina as catalyst supports. In this paper, we report a facile synthesis of ordered and high thermal stability mesoporous alumina doping with La or Ce ions under hydrochloric acid conditions. Thermal stability improvements by rare earth (La and Ce) doping are discussed. In our work, we find that both rare earth doping can effectively stabilize the amorphous walls of alumina mesostructures. This material presents the ability to maintain the surface area and pore structure upon prolonged heating below 700 ℃. Further more, as the results shows the modification of La for improving the thermal stability is more effective than Ce. Besides, Cl- does not strongly influence the self-assembly process in the closed system.

关键词： Mesoporous materials Surfaces area rare earth

作者: Lili Gao Chao Yang Yinping Xu Xike Tian Suxin Zhang Yanxin Wang

作者单位: Faculty of Material Science and Chemistry Engineering, China University of Geosciences,Wuhan 430074, Faculty of Material Science and Chemistry Engineering, China University of Geosciences,Wuhan 430074, State key laboratory of geological processes and mineral resources, China University of Geosciences, School of Environmental Studies, China University of Geosciences, Wuhan 430074, P R China

会议类型: 国内会议

会议名称: 中国颗粒学会超微颗粒专委会2011年年会暨第七届海峡两岸超微颗粒学术研讨会

会议地点: 辽宁丹东

会议语种:英文

页码: 120-126

在线出版日期: 2011-08-08（万方平台首次上网日期，不代表论文的发表时间）