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[1]吴如云,居沈贵.La3+掺杂LiMn2O4离子筛前驱体的制备及特性研究[J].南京工业大学学报(自然科学版),2018,40(05):35-39.[doi:10.3969/j.issn.1671-7627.2018.05.006]
 WU Ruyun,JU Shengui.Preparation and performance of La3+-doped LiMn2O4 adsorbent precursor[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2018,40(05):35-39.[doi:10.3969/j.issn.1671-7627.2018.05.006]
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La3+掺杂LiMn2O4离子筛前驱体的制备及特性研究()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
40
期数:
2018年05期
页码:
35-39
栏目:
出版日期:
2018-09-20

文章信息/Info

Title:
Preparation and performance of La3+-doped LiMn2O4 adsorbent precursor
文章编号:
1671-7627(2018)05-0035-05
作者:
吴如云居沈贵
南京工业大学 化工学院,江苏 南京 210009
Author(s):
WU RuyunJU Shengui
College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
LiMn2O4 La3+改性 溶损 再生
Keywords:
LiMn2O4 La3+ modification dissolution reuse
分类号:
TQ131.1
DOI:
10.3969/j.issn.1671-7627.2018.05.006
文献标志码:
A
摘要:
以传统溶胶-凝胶法制备Li+筛前驱体LiMn2O4(LMO),并对水浴反应条件进行优化。溶液pH为6、反应时间为6 h时合成的样品结构最为稳定,掺La3+后得到LiLa0.01Mn1.99O4(LLMO)。利用X线衍射仪(XRD)和扫描电子显微镜(SEM)研究了材料的结构和表观形貌,通过等离子体发射光谱仪(ICP)确定元素的化学状态,并对溶损率、吸附容量和重复利用率进行考察和对比。结果表明:掺La3+后的LLMO对Mn3+溶损率与LMO相比下降了近34%,经5次循环实验后,LLMO吸附量仍达到初始吸附量的84.32%(21.3 mg/g),高于LMO的77.37%。由此可见,掺杂La3+能有效地改善溶损问题,利于离子筛的循环与再生利用,且其对盐湖卤水有较好的离子选择分离性,为稀土掺杂LMO提供了依据和方向。
Abstract:
LiMn2O4(LMO)was prepared by the traditional sol-gel method and the reaction conditions were optimized.The most stable structure was obtained when the pH of the solution was 6 and the reaction time was 6 h and then doped with La3+ to prepare LiLa0.01Mn1.99O4(LLMO).The structure and morphology of the materials were studied by X-ray diffractometer(XRD)and scanning electron microscopy(SEM).The chemical formula of the materials were determined by inductively coupled plasma emission spectrometer(ICP),and the dissolution loss,adsorption capacity and recycling performance were studied and compared.The dissolution loss of LLMO was decreased by nearly 34% as compared with that of LMO,and after 5 cycles,the adsorption capacity of LLMO reached 84.32%(21.3 mg/g),which was higher than that of LMO(77.37%).It was confirmed that La3+-doping could decrease the dissolution loss effectively,which was beneficial to the reuse and recycle of the ion sieve. LLMO had a good selectivity of metal ion in brine,and provided the basis and direction for doping of rare earth in LMO.

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备注/Memo

备注/Memo:
收稿日期:2017-05-09
基金项目:国家自然科学基金(U1407122); 江苏省创新项目(KYLX15_0796)
作者简介:吴如云(1992—),女,浙江温州人,硕士,主要研究方向为锂离子筛吸附剂的制备与应用; 居沈贵(联系人),教授,E-mail:jushengui@njtech.edu.cn.
引用本文:吴如云,居沈贵.La3+掺杂LiMn2O4离子筛前驱体的制备及特性研究[J].南京工业大学学报(自然科学版),2018,40(5):35-39..
更新日期/Last Update: 2018-09-30