摘要
采用溶液燃烧法,以硝酸铝为氧化剂,甘露醇为还原剂,添加硼酸为改性剂,制备了硼掺杂的活性氧化铝,开发了硼改性的氧化铝新工艺。通过XRD、XPS、SEM、BET等手段系统研究了该样品的性能及结构。结果显示,制备B/γ-Al_2O_3的最佳工艺条件为:硼酸、甘露醇与硝酸铝的摩尔比为0.02:1:1,pH=4,焙烧温度为950℃、焙烧时间为4h,改性γ-Al_2O_3的相变温度在950~1 000℃之间。采用溶液燃烧合成法所制得的B-Al_2O_3粉体,具有热稳定性高、粒径较小且粒径分布较为均匀等优点。
The boron doped activated alumina was prepared by solution combustion method,with aluminum nitrate as oxidant,mannitol as reducing agent and boric acid as modifier.A new process of boron modified alumina was developed.The properties and structure of the sample were studied systematically by means of XRD,XPS,SEM and BET.The results showed that the optimum conditions for the preparation of B/γ-Al2O3 molar ratio of boric acid,mannitol and aluminum nitrate is 0.02：1：1,pH=4,calcination temperature of 950℃,the roasting time is 4 h,the modified γ-Al2O3 phase transition temperature at 950-1 000 ℃.The B/γ-Al2O3 powder prepared by the solution combustion synthesis method has the advantages of high thermal stability,small particle size and uniform particle size distribution.
作者
闫伟鹏
符荣
周宇
王亚楠
凌凤香
储刚
Yan Weipeng;Fu Rong;Zhou Yu;Wang Yanan;Ling Fengxiang;Chu Gang(College of Chemistry, Chemical Engineering and Environmental Engineering Liaoning Shihua University, Fushun 113001, Liaoning , China;Liaoning Petrocchemical Vocational And Technology, Jinzhou 121000,Liaoning, China;Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun 113001, Liaoning, China)
出处
《精细石油化工》
CAS
CSCD
北大核心
2018年第2期29-32,共4页
Speciality Petrochemicals
基金
辽宁省自然科学基金资助项目(201202122)
辽宁石油化工大学2017年大学生创新创业训练计划(国家级201710148000014)
关键词
溶液燃烧法
硼改性
Γ-氧化铝
solution combustion method
boron modification
γ-aluminium oxide
