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Microwave-assisted acid functionalized carbon nanofibers decorated with Mn doped TNTs nanocomposites: Efficient contenders for lithium adsorption and recovery from aqueous media
Journal of Industrial and Engineering Chemistry ( IF 5.9 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.jiec.2020.09.014
Urooj Kamran , Soo-Jin Park

Abstract The industrial need for lithium metal is foreseen to be stepping up in the near future. Herein, we have successfully fabricated microwave-assisted, acid-functionalized carbon nanofibers (ACNFs) decorated with manganese-doped titanium nanotubes (TNT-Mnx), a novel nanocomposite for Li+ adsorption. Nanocomposites (ACNF-TNT-Mn0.5, ACNF-TNT-Mn1, and ACNF-TNT-Mn1.5) were prepared by different strategies: oxidizing acidic treatment, alkaline hydrothermal technique, and a modified conventional Murray approach. The distinctive Li+ adsorption parameters were demonstrated: pH (14), nanocomposite dose (0.075 g), and contact time (180 min) by batch adsorption tests. The nanocomposite (ACNF-TNT-Mn1) at optimized adsorption condition was capable of showing Li+ adsorption of 52 mg g−1, which is ≈ 10.4 and 4 folds higher than pristine ACNF and TNT-Mnx, respectively. The improved Li+ adsorption can be attributed to the combined effect of Mn2+ species in TNT-Mnx and large surface area of ACNF within a nanocomposite. The adsorbed Li+ ions from nanocomposites were easily recovered (99%). Besides, the nanocomposites show selective Li+ adsorption and stability over several adsorption tests. Furthermore, the doping of Mn2+ on TNT within nanocomposite leads to the improvement in Li+ uptakes. By considering these efficient properties, the fabricated nanocomposites can be applicable on a large scale as a potential adsorbent for Li+ recovery.

中文翻译:

用Mn掺杂的TNTs纳米复合材料装饰的微波辅助酸功能化碳纳米纤维:从水介质中吸附和回收锂的有效竞争者

摘要 预计在不久的将来,工业对锂金属的需求将会增加。在此,我们成功地制造了用掺杂锰的钛纳米管 (TNT-Mnx) 装饰的微波辅助酸功能化碳纳米纤维 (ACNF),这是一种用于 Li+ 吸附的新型纳米复合材料。通过不同的策略制备纳米复合材料(ACNF-TNT-Mn0.5、ACNF-TNT-Mn1 和 ACNF-TNT-Mn1.5):氧化酸性处理、碱性水热技术和改进的常规 Murray 方法。通过批量吸附测试证明了独特的 Li+ 吸附参数:pH (14)、纳米复合材料剂量 (0.075 g) 和接触时间 (180 分钟)。优化吸附条件下的纳米复合材料(ACNF-TNT-Mn1)能够显示出 52 mg g-1 的 Li+ 吸附量,比原始 ACNF 和 TNT-Mnx 高 ≈ 10.4 和 4 倍,分别。改进的 Li+ 吸附可归因于 TNT-Mnx 中的 Mn2+ 物质和纳米复合材料中 ACNF 的大表面积的综合作用。从纳米复合材料中吸附的锂离子很容易回收(99%)。此外,纳米复合材料在多次吸附试验中表现出选择性的 Li+ 吸附和稳定性。此外,纳米复合材料中 TNT 上的 Mn2+ 掺杂导致 Li+ 吸收的改善。通过考虑这些有效特性,制备的纳米复合材料可以作为潜在的 Li+ 回收吸附剂大规模应用。纳米复合材料在多次吸附试验中表现出选择性的 Li+ 吸附和稳定性。此外,纳米复合材料中 TNT 上的 Mn2+ 掺杂导致 Li+ 吸收的改善。通过考虑这些有效的特性,制造的纳米复合材料可以作为潜在的 Li+ 回收吸附剂大规模应用。纳米复合材料在多次吸附试验中表现出选择性的 Li+ 吸附和稳定性。此外,纳米复合材料中 TNT 上的 Mn2+ 掺杂导致 Li+ 吸收的改善。通过考虑这些有效特性,制备的纳米复合材料可以作为潜在的 Li+ 回收吸附剂大规模应用。
更新日期:2020-12-01
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