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Title: Hydrothermal synthesis and characterization of titanium dioxide nanotubes as novel lithium adsorbents

The ion exchange process is a promising method for lithium extraction from brine and seawater having low concentrations of this element. To achieve this goal, it is vital to use an effective adsorbent with maximum lithium adsorption potential together with a stable structure during extraction and insertion of the ions. In this study, titanium dioxide and then lithium titanate spinel with nanotube morphology was synthesized via a simple two-step hydrothermal process. The produced Li{sub 4}Ti{sub 5}O{sub 12} spinel ternary oxide nanotube with about 70 nm diameter was then treated with dilute acidic solution in order to prepare an adsorbent suitable for lithium adsorption from local brine. Morphological and phase analysis of the obtained nanostructured samples were done by using transmission and scanning electron microscopes along with X-ray diffraction. Lithium ion exchange capacity of this adsorbent was finally evaluated by means of adsorption isotherm. The results showed titanium dioxide adsorbent could recover 39.43 mg/g of the lithium present in 120 mg/L of lithium solution.
Authors:
; ;  [1] ;  [2]
  1. Department of Materials Science and Engineering, Sharif University of Technology, Tehran (Iran, Islamic Republic of)
  2. Metallurgy Group, Engineering Department, Zanjan Branch, Islamic Azad University, Zanjan (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22420741
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 61; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADSORBENTS; ADSORPTION; ADSORPTION ISOTHERMS; CONCENTRATION RATIO; HYDROTHERMAL SYNTHESIS; ION EXCHANGE; LITHIUM IONS; LITHIUM TITANATES; MORPHOLOGY; NANOTUBES; PHASE STUDIES; SCANNING ELECTRON MICROSCOPY; SPINELS; X-RAY DIFFRACTION