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- W2965010275 abstract "Abstract Lithium ion sieves (LIS) have gained great interest in lithium recovery. However, the synthesis of high stability, selectivity, and adsorption capacity of LIS is still a great challenge. Here, a general strategy combining electrospinning and calcination techniques is developed to fabricate a series of porous titanium-based LIS nanofibers. The porous structure created by calcination increases the exposure of the adsorption sites, which significantly accelerates the deintercalation and intercalation of Li+ from and into the vacancies in the framework. All of samples have good Li+ adsorption capacity and high selectivity for Li+. As a proof of concept, porous H4Ti5O12 nanofibers (P-HTO-NF) transformed from the electrospun porous Li4Ti5O12 nanofibers (P-LTO-NF) are systematically investigated in lithium recovery. P-HTO-NF possesses a superior adsorption capacity (59.1 mg/g), which is nearly close to the theoretical value (63.77 mg/g). The Freundlich isotherm model can well describe the adsorption isotherm data. The adsorption equilibrium can reach within 30 min (C0 = 300 mg/L, pH = 11, S/L = 60 mg/60 mL). The equilibrium distribution coefficient (Kd, mL/g) for Li + (232) is extremely higher than that for competing ions (1.41 for Na+, 1.17 for K+, 0.88 for Mg2+, 0.58 for Ca2+) (C0 = 40 mg/L for Li+, pH = 8), indicative of a highly selective recovery of lithium from brine water. The LIS show excellent stability with a low Ti dissolution and the adsorption capacity for Li+ remains 86.5% after 6 cycles. Our work provides a universal strategy for the synthesis of porous LIS." @default.
- W2965010275 created "2019-08-13" @default.
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- W2965010275 date "2020-01-01" @default.
- W2965010275 modified "2023-10-17" @default.
- W2965010275 title "Porous lithium ion sieves nanofibers: General synthesis strategy and highly selective recovery of lithium from brine water" @default.
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- W2965010275 doi "https://doi.org/10.1016/j.cej.2019.122407" @default.
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