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膨润土改性制备多孔结构钛锂离子筛前驱体

黄成华 李燕 张菁菁 税亿 吴娜 张理元

黄成华, 李燕, 张菁菁, 税亿, 吴娜, 张理元. 膨润土改性制备多孔结构钛锂离子筛前驱体[J]. 钢铁钒钛, 2022, 43(3): 1-8. doi: 10.7513/j.issn.1004-7638.2022.03.001
引用本文: 黄成华, 李燕, 张菁菁, 税亿, 吴娜, 张理元. 膨润土改性制备多孔结构钛锂离子筛前驱体[J]. 钢铁钒钛, 2022, 43(3): 1-8. doi: 10.7513/j.issn.1004-7638.2022.03.001
Huang Chenghua, Li Yan, Zhang Jingjing, Shui Yi, Wu Na, Zhang Liyuan. Synthesis of porous bentonite modified titanium-lithium ion sieve precursor[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 1-8. doi: 10.7513/j.issn.1004-7638.2022.03.001
Citation: Huang Chenghua, Li Yan, Zhang Jingjing, Shui Yi, Wu Na, Zhang Liyuan. Synthesis of porous bentonite modified titanium-lithium ion sieve precursor[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 1-8. doi: 10.7513/j.issn.1004-7638.2022.03.001

膨润土改性制备多孔结构钛锂离子筛前驱体

doi: 10.7513/j.issn.1004-7638.2022.03.001
基金项目: 四川省科技计划项目 (项目号2019YJ0383)。
详细信息
    作者简介:

    黄成华 (1963—),女,四川资中人,本科,副教授,主要从事离子交换吸附材料研究,E-mail:758361920@qq.com

    通讯作者:

    张理元,博士,副教授,E-mail:zhangliyuansir@126.com

  • 中图分类号: TF823,TQ424

Synthesis of porous bentonite modified titanium-lithium ion sieve precursor

  • 摘要: 以Ti(SO4)2为钛源,CH3COOLi·2H2O为锂源,NH3·H2O为沉淀剂,H2O2为络合剂,采用沉淀胶溶法制备了钛酸锂前驱体溶胶,添加膨润土,经搅拌、陈化、干燥、煅烧后得到膨润土改性Li2TiO3粉体。研究了络合剂H2O2与Ti的摩尔比(R)、煅烧温度、膨润土与溶胶的固液比对Li2TiO3的表面形貌及晶体结构的影响。采用扫描电镜、X射线衍射、热重-差示扫描量热、红外光谱对样品进行表征。结果表明,当R=6时,未改性的Li2TiO3在750 ℃煅烧下,晶体结构最完整。按1.67 g/L的固液比添加膨润土对样品进行改性后,煅烧温度为750 ℃时各晶面结晶最完整,得到表面呈均匀多孔结构的Li2TiO3
  • 图  1  H2O2与Ti的摩尔比(R)不同时的Li2TiO3的SEM形貌

    Figure  1.  SEM images of Li2TiO3 with different molar ratios of H2O2 to Ti

    (a) R=3;(b) R=4;(c) R=5;(d) R=6;(e) R=7;(f) R=9

    图  2  H2O2与Ti的摩尔比不同时的Li2TiO3的XRD谱

    Figure  2.  XRD patterns of Li2TiO3 with different molar ratios of H2O2 to Ti

    (a) R=3;(b) R=4;(c) R=5;(d) R=6;(e) R=7;(f) R=9

    图  3  膨润土-Li2TiO3在不同煅烧温度下的XRD谱(固液比为1.667 g/L,R=6)

    Figure  3.  XRD patterns of bentonite-Li2TiO3 calcined at different temperatures with a solid-to-liquid ratio of 1.667 g/L and R value of 6

    (a) 600 ℃;(b) 650 ℃;(c) 700 ℃; (d) 750 ℃;(e) 800 ℃;(f) 900 ℃

    图  4  膨润土-Li2TiO3热重-差示扫描量热曲线

    Figure  4.  TG-DSC curve of bentonite-Li2TiO3

    图  5  按不同固液比添加膨润土改性处理的Li2TiO3的XRD谱(R=6)

    Figure  5.  XRD patterns of Li2TiO3 modified by adding bentonite at different solid-to-liquid ratios with R value of 6 value of 6

    (a) 0.333 g/L;(b) 1 g/L;(c) 1.667 g/L;(d) 2.5 g/L;(e) 3.333 g/L

    图  6  按不同固液比添加膨润土改性处理的Li2TiO3的SEM形貌(R=6)

    (a) 煅烧后膨润土;(b) 0.333 g/L;(c) 1 g/L;(d) 1.667 g/L;(e) 2.5 g/L;(f) 3.333 g/L

    Figure  6.  SEM images of Li2TiO3 modified by adding bentonite at different solid-liquid ratios with R value of 6

    图  7  Li2TiO3和膨润土-Li2TiO3(1.667 g/ L)的FTIR谱

    (a) Li2TiO3 ; (b) 膨润土-Li2TiO3

    Figure  7.  FTIR spectra of Li2TiO3 and bentonite-Li2TiO3

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  • 收稿日期:  2022-05-05
  • 刊出日期:  2022-06-30

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