期刊
CHEMICAL ENGINEERING JOURNAL
卷 368, 期 -, 页码 400-408出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.02.160
关键词
Titanium carbide; Microspheres; Adsorption; Heavy metal
资金
- LG Yonam Foundation (of Korea)
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education
- Ministry of Science and ICT [NRF-2018R1A6A1A03024962, NRF-2018M2A7A1074563, NRF-2016R1A2B4010431]
Two-dimensional (2-D) titanium carbide MXene core (Ti3C2Tx) shell aerogel spheres (MX-SA) for mercuric ion removal were designed and fabricated with varying concentrations of Ti3C2Tx MXene and sodium alginate (SA) using a facile method. Owing to their unique inside structures, high porosities, large specific surface areas, oxygenated functional groups of MXene nanosheets, and available active binding sites, the synthesized microspheres constitute a unique adsorbent for heavy metals removal in water. The MX-SA(4:20) spheres exhibit an exceptional adsorption capacity of 932.84 mg/g for Hg2+, which is among the highest value reported for adsorbents. The adsorbent exhibits high single-and multi-component removal efficiencies, with 100% efficiency for Hg2+ and > 90% efficiency for five heavy metal ions. The synthesized materials are highly efficient for Hg2+ removal under extreme pH conditions (0.5-1.0 M HNO3) and have additional excellent reproducible properties. The micro-size and spherical shape of MX-SA(4:20) also allow it to be used in column-packed devices.
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