Suitability, structure stability, and mechanism of Li1.33MgxTi1.67-xO4 (x = 0.05–0.5) and Li2MgxTi1-xO3 (x = 0.01–0.1) oxides for enhanced lithium ions adsorption
Ivanets A. Bicheva E. Kouznetsova T. Silerio-Vázquez F.D.J. Hosseini-Bandegharaei A. Baigenzhenov O. Su X.
22 April 2026Elsevier B.V.
Separation and Purification Technology
2026#388
This study presents the synthesis of Mg-doped oxide adsorbents, specifically Li1.33MgxTi1.67-xO4 (x = 0.05–0.5) and Li2MgxTi1-xO3 (x = 0.01–0.1), via a solid-state method, exhibiting enhanced adsorption performance through multiple lithium ion (Li+) adsorption-desorption cycles. The phase stability of these Mg2+-substituted oxides was rigorously characterized using X-ray diffraction analysis, confirming their structural integrity across the doping range. Comprehensive physicochemical investigations on the parent oxides Li2TiO3 and Li4Ti5O12 were conducted employing infrared spectroscopy, scanning electron microscopy, and low-temperature nitrogen adsorption-desorption techniques, elucidating doping mechanism of magnesium ions within host lattices. The study also detailed the transformation behavior into protonated (H-form) state and demonstrated the comparative cycling performance and structural evolution of the crystalline frameworks over five adsorption-desorption cycles. Notably, the Mg doping increased the adsorption capacity to 37.7 mg/g for Li1.33Mg0.25Ti1.42O4 and 65.2 mg/g for Li2Mg0.02Ti0.98O3, maintaining substantial efficiency over five adsorption-desorption cycles. Such results demonstrate that Mg-doped Li2TiO3 and Li4Ti5O12 are promising adsorbent candidates for lithium recovery, showing enhanced capacity and sustained structural integrity over multiple adsorption-regeneration cycles.
Crystalline structure , Li+ adsorption , Mg2+-doped lithium titanate oxides, Li2TiO3 and Li4Ti5O12 , Multicycle adsorption
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Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus, Minsk, 220072, Belarus
CIIDIR-Unidad Durango, Instituto Politécnico Nacional, Calle Sigma 119, Fraccionamiento 20 de Noviembre II, C. P, Durango, 34220, Mexico
Faculty of Chemistry, Semnan University, Semnan, Iran
Scientific Research Center, Al-Ayen Iraqi University (AUIQ), Thi-Qar, Nasiriyah, 64001, India
Centre of Research Impact and Outcome, Chitkara University, Punjab, Rajpura, 140417, India
Department of Metallurgical Engineering, Satbayev University, Almaty, Kazakhstan
School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangdong, Guangzhou, China
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
CIIDIR-Unidad Durango
Faculty of Chemistry
Scientific Research Center
Centre of Research Impact and Outcome
Department of Metallurgical Engineering
School of Environment and Energy
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