富钛料制备H<sub>2</sub>TiO<sub>3</sub>型锂离子吸附剂及其吸附性能研究

唐大海; 周加贝; 周大利; 姚歉歉; 张理元

doi:10.7513/j.issn.1004-7638.2017.02.009

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富钛料制备H₂TiO₃型锂离子吸附剂及其吸附性能研究

doi: 10.7513/j.issn.1004-7638.2017.02.009

1. 四川大学材料科学与工程学院, 四川成都 610064;
2. 四川大学化学工程学院, 四川成都 610064

详细信息

中图分类号: TF823,TQ028,TQ424
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出版历程
- 收稿日期: 2016-07-31

Preparation of H₂TiO₃ Lithium-ion Adsorbent Using Ti-rich Material and Its Adsorption Performance Study

1. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, Sichuan, China;
2. College of Chemical Engineering, Sichuan University, Chengdu 610064, Sichuan, China

摘要

摘要: 以熔分钛渣提纯得到的富钛料为钛源, 通过固相法合成了吸附剂前躯体β-Li₂TiO₃。前躯体Li₂TiO₃经酸洗脱出Li⁺后制备得到H₂TiO₃型锂离子吸附剂。考察了前躯体Li₂TiO₃的合成温度, 采用吸附动力学模型和Langmuir吸附等温方程研究了吸附剂的吸附性能。结果表明:当反应温度为750℃时, 得到了具有良好结晶性的前驱体β-Li₂TiO₃。在Li⁺浓度为2 g/L的LiOH溶液中, 该吸附剂的Li⁺吸附容量为28.51 mg/g。随吸附液的碱性增强, Li⁺浓度升高, 吸附剂的吸附容量增大。通过Langmuir吸附等温方程计算, 得出该吸附剂的理论最大吸附容量为45.6 mg/g。
- 富钛料 /
- 前躯体Li₂TiO₃ /
- 锂离子吸附剂 /
- 吸附性能
Abstract: β-Li₂ TiO₃ was synthesized as precursor of the lithium-ion adsorbent via solid-phase reaction using Ti-rich material as titanium source,which was prepared by purification of melt-separated titanium slag.H₂ TiO₃ lithium-ion adsorbent was finally obtained after extracting Li⁺ from the precursor Li₂ TiO₃ via acid treatment.The synthesis temperature of precursor Li₂ TiO₃ was investigated and the adsorption properties of the adsorbent were studied using adsorption kinetics model and Langmuir adsorption isotherm equation.Precursor β-Li₂ TiO₃ with good crystallization was obtained at 750 °C.In LiOH solution with 2 g/L of Li⁺ concentration, Li⁺ adsorption capacity of the adsorbent reached 28.51 mg/g.Li⁺ adsorption capacity increased with increase in alkalinity and Li⁺ concentration of the solution.The theoretical maximum adsorption capacity calculated by Langmuir equation was 45.6 mg/g for the obtained adsorbent.
- Ti-rich material /
- precursor Li₂TiO₃ /
- lithium-ion adsorbent /
- adsorption properties