掺铈钛系离子筛的合成及性能研究  

Preparation and properties of Ce-doped titanium based ion sieve

作　　者：袁艺珈 赖先熔 孙豪 阳超 钟辉[1] YUAN Yi-jia;LAI Xian-rong;SUN Hao;YANG Chao;ZHONG Hui(College of Materials and Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China;Fanyulineng New Material Technology Co.Ltd.,Chengdu 610000,China)

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]四川泛宇锂能新材料科技有限公司,四川成都610000

出　　处：《高校化学工程学报》2022年第2期226-234,共9页Journal of Chemical Engineering of Chinese Universities

基　　金：西藏科技厅重点研发计划(XZ202001ZY0010G)。

摘　　要：以二氧化钛,碳酸锂,六水合硝酸铈为原料,通过高温固相法合成掺铈钛系离子筛前驱体,酸洗后得到掺铈钛系离子筛(HTO-Ce),采用X射线衍射仪(XRD),扫描电镜(SEM),X射线光电子能谱仪(XPS)等表征,并进行吸附性能评价,结果表明:掺杂Ce后晶胞结构得到改善,对Li^(+)交换效率明显提高,HTO-Ce对Li^(+)的饱和容量吸附容量为32.53 mg×g^(-1),较未改性提高9.4%,在常温和pH=8时即可达到良好的吸附效果,经过20次循环,离子筛对Li^(+)的吸附率保持在80%以上,其晶体结构和新鲜吸附剂保持一致,具有极高的稳定性,在盐湖提锂领域有广阔的应用前景。The precursor of Ce-doped titanium ion sieve was synthesized via a high temperature solid phase method using titanium dioxide,lithium carbonate and cerium nitrate hexahydrate as raw materials.Ce-doped titanium ion sieve(HTO-Ce)was obtained after acid washing.Adsorption performance was evaluated by XRD,SEM and XPS.The results show that the ion sieve cell structure is improved after Ce doping,and the Li^(+)exchange efficiency is obviously promoted.The saturation capacity of HTO-Ce for Li^(+)was 32.53 mg×g^(-1),which was increased by 9.4%compared with the unmodified.Satisfying adsorption effects can be achieved at room temperature and pH=8 after 20 cycles.Adsorption rates of Li^(+)stayed over 80%and its crystal structure remained the same because of high stability.The prepared material has application prospects in lithium extraction from salt lakes.

关 键 词：吸附剂 动力学模型 颗粒 钛系离子筛 盐湖卤水 掺杂 

分 类 号：TQ131.1[化学工程—无机化工]