One-pot synthesis of layered double hydroxide hollow nanospheres with ultrafast removal efficiency for heavy metal ions and organic contaminants.

Title One-pot synthesis of layered double hydroxide hollow nanospheres with ultrafast removal efficiency for heavy metal ions and organic contaminants.
Authors M. Mubarak; H. Jeon; M.Shahinul Islam; C. Yoon; J.S. Bae; S.J. Hwang; W. San Choi; H.J. Lee
Journal Chemosphere
DOI 10.1016/j.chemosphere.2018.03.046
Abstract

Herein, Mg/Fe layered double hydroxide (MF-LDH) hollow nanospheres were successfully prepared by a one-step thermal method. After the thermal treatment of MF-LDH nanospheres at 400?°C, the MF-LDH was converted into the corresponding oxide, Mg/Fe layered double oxide (MF-LDO), which maintained the hollow nanosphere structure. The MF-LDO hollow nanospheres exhibited excellent adsorption efficiency for both As(V) and Cr(VI), showing 99% removal within 5?min and providing maximum removal capacities of 178.6?mg?g [As(VI)] and 148.7?mg?g [Cr(VI)]. Moreover, it met the maximum contaminant level requirements recommended by World Health Organization (WHO); 10?ppm for As(V) and 50?ppm for Cr(VI) in 10 and 20?min, respectively. Furthermore, Au nanoparticles were successfully introduced in the MF-LDO hollow nanospheres, and the products showed a conversion rate of 100% for the reduction of 4-nitrophenol into 4-aminophenol within 5?min. It is believed that these excellent and versatile abilities integrated with a facile synthetic strategy will facilitate the practical application of this material in cost-effective wastewater purification.

Citation M. Mubarak; H. Jeon; M.Shahinul Islam; C. Yoon; J.S. Bae; S.J. Hwang; W. San Choi; H.J. Lee.One-pot synthesis of layered double hydroxide hollow nanospheres with ultrafast removal efficiency for heavy metal ions and organic contaminants.. Chemosphere. 2018;201:676686. doi:10.1016/j.chemosphere.2018.03.046

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