Volume 92
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Li, Y., Lin, H., Yu, Q., Ma, N., & Dai, W. (2024). UiO-66-NH2 nanoparticles supported on layered double hydroxides as an excellent adsorbent for levofloxacin capture. Particuology, 92, 155-165. https://doi.org/10.1016/j.partic.2024.05.004
UiO-66-NH2 nanoparticles supported on layered double hydroxides as an excellent adsorbent for levofloxacin capture
Yan Li a, Heng Lin b, Qiaolan Yu b, Na Ma a, Wei Dai a b *
a College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China
b Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, China
10.1016/j.partic.2024.05.004
Volume 92, September 2024, Pages 155-165
Received 12 March 2024, Revised 30 April 2024, Accepted 9 May 2024, Available online 17 May 2024, Version of Record 25 May 2024.
E-mail: daiwei@zjnu.edu.cn

Highlights

• A new-style 3D flower-like MgAl-LDH@UiO-66-NH2 adsorbent was first constructed.

• MgAl-LDH@UiO-66-NH2 composite exhibits adsorption performance toward levofloxacin.

• MgAl-LDH and UiO-66-NH2 structure is beneficial to expose more active sites and facilitate levofloxacin capture.


Abstract

The adsorption performances of individual adsorbent such as UiO-66-NH2 and MgAl-layered double hydroxides (MgAl-LDH) toward levofloxacin (LVX) is less satisfactory due to the disappointing uptake capacity and adsorption efficiency. Herein, a 3D flower-like composite adsorbent prepared via iterative hydrothermal synthesis method anchoring UiO-66-NH2 nanoparticles onto the MgAl-LDH surface. Attributed to the synergistic effects of UiO-66-NH2, and MgAl-LDH, the MgAl-LDH@UiO-66-NH2 exhibits an outstanding adsorption performance toward LVX. Typically, the maximum LVX uptake capacity over MgAl-LDH@UiO-66-NH2 reached 268 mg/g, which was higher than that of the individual adsorption materials UiO-66-NH2 (41 mg/g), MgAl-LDH (140 mg/g), and some adsorbents reported in previous literature. The rapid adsorption process can reach equilibrium within 20 min, which conformed well to the pseudo-second-order kinetics and the Langmuir isotherm model. Adsorption thermodynamic result also indicated that the adsorption was spontaneous and exothermic, simultaneous coexisting physical and chemical adsorption interactions. Importantly, the MgAl-LDH@UiO-66-NH2 still maintained excellent adsorption capacity with a slightly decrease after fifth cycle, exhibiting a remarkable reuse and stable performances. This work provides a highly novel strategy to prepare recyclable composite adsorbent for the LVX capture from aqueous solution.

Graphical abstract
Keywords
Layered double hydroxides; UiO-66-NH2; LVX; Adsorption