Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 92, Issue -, Pages 263-277Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2020.09.014
Keywords
Manganese-doped titanate nanotubes; Carbon nanofiber; Nanocomposite; Lithium adsorption; Recovery
Funding
- Korea Evaluation Institute of Industrial Technology (KEIT) through the Carbon Cluster Construction project - Ministry of Trade, Industry & Energy (MOTIE, Korea) [10083586]
- Korea Sanhak Foundation (KSF) in 2020, entitled Development of high-performance carbon-based adsorption material technology to remove indoor harmful factors
- National Research Foundation of Korea [5199990414547] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 approximate to 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. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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