硝酸锂改性钛系离子筛的制备及其吸附性能

郭佳明; 刘明言; 吴强; 马永丽

doi:10.11949/0438-1157.20191484

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硝酸锂改性钛系离子筛的制备及其吸附性能

材料化学工程与纳米技术 | 更新时间：2026-07-24

- 硝酸锂改性钛系离子筛的制备及其吸附性能
- Preparation and adsorption performance of titanium based lithium ion sieve improved by LiNO ₃
- 化工学报 2020年71卷第2期页码：879-888
- 作者机构：
  
  1. 天津大学化工学院，天津 300350
  2. 化学工程联合国家重点实验室（天津大学），天津 300350
- 作者简介：
  
  郭佳明（1993—），男，硕士研究生， 1449382193@qq.com
  刘明言（1966—），男，博士，教授， myliu@tju.edu.cn
- 基金信息：
- DOI：10.11949/0438-1157.20191484
  中图分类号： TQ 131.1
- 收稿：2019-12-06，
  
  修回：2020-01-03，
  
  网络首发：2020-08-14，
  
  纸质出版：2020-02-05
- 稿件说明：
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郭佳明, 刘明言, 吴强, 马永丽. 硝酸锂改性钛系离子筛的制备及其吸附性能[J]. 化工学报, 2020, 71(2): 879-888

GUO Jiaming, LIU Mingyan, WU Qiang, MA Yongli. Preparation and adsorption performance of titanium based lithium ion sieve improved by LiNO , ₃[J]. CIESC Journal, 2020, 71(2): 879-888 DOI: 10.11949/0438-1157.20191484.
郭佳明, 刘明言, 吴强, 马永丽. 硝酸锂改性钛系离子筛的制备及其吸附性能[J]. 化工学报, 2020, 71(2): 879-888 DOI： 10.11949/0438-1157.20191484.

GUO Jiaming, LIU Mingyan, WU Qiang, MA Yongli. Preparation and adsorption performance of titanium based lithium ion sieve improved by LiNO , ₃[J]. CIESC Journal, 2020, 71(2): 879-888 DOI: 10.11949/0438-1157.20191484. DOI：

摘要

钛系锂离子筛具有较高的锂吸附容量和稳定性，对其制备工艺及性能进行改进研究具有重要意义。使用硝酸锂和碳酸锂混合物作为锂源，与二氧化钛在500℃下进行固相反应，生成层状钛酸锂；使用0.2 mol·L

-1

盐酸对其酸洗24 h，得到了锂离子筛吸附剂；采用X射线衍射、扫描电镜、粒度分析、N

吸附-脱附方法等，对其性能进行了表征；通过锂离子的吸附实验，确定了吸附和再生性能；探究了该新型吸附剂的锂离子吸附机理。结果表明：吸附过程是单分子层化学吸附；经过改性，离子筛颗粒更加细小，孔体积和比表面积更大，结构完整；在70 mg·L

-1

的Li

溶液中，吸附量为25.01 mg·g

-1

，准二级吸附速率常数为0.2762 g·(mg·h)

-1

，吸附速率较之未改性提高了54.56%；该离子筛对浓度为11.6 mg·L

-1

的Li

溶液，其锂去除率可以达到99.77%。

Abstract

Titanium based lithium ion

sieves have excellent lithium adsorption capacity and stability

and the improvement studies on its preparation and character are of great importance. A mixture of LiNO

and Li

was used as the lithium source to synthesize laminar Li

TiO

through the solid state reaction at 500℃

and lithium ion sieves were prepared after being put it in 0.2 mol·L

-1

hydrochloric acid pickling solution for 24 h. Physicochemical properties of the ion sieves were characterized by X-ray diffraction (XRD)

scanning electronmicroscopy (SEM)

particle size distribution analysis and nitrogen adsorption-desorption measurements. Adsorption

regeneration properties of the ion sieves and adsorption mechanism were investigated. It is revealed that adsorption process conforms to the monomolecular and chemical adsorption. Furthermore

micro-scale particles with higher pore volume and higher specific area were obtained after modification. Adsorption capacity and pseudo-second-order kinetic constant of 25.01 mg·g

-1

and 0.2762 g·(mg·h)

-1

respectively

were obtained by pouring the lithium ion sieves in the solution of 70 mg·L

-1

for 24 h. Hence

the increase in adsorption rate of 54.56% was observed. The removal rate of Li

(99.77%) can be reached using this ion sieves in the solution of concentration of 11.6 mg·L

-1

关键词

Keywords

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