4.4 Article

Ethylenediamine-Modified Hollow Porous Nanospheres for Effective Removal of Chromium (VI)

期刊

CHEMISTRYSELECT
卷 6, 期 23, 页码 5711-5718

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202100909

关键词

Cr(VI) adsorption; Hyper-crosslinking mediated self-assembly strategy; Ethylenediamine-modified; Hollow porous nanospheres; Electrostatic attraction

资金

  1. National Natural Science Foundation of China [21574042, 51273066]
  2. Fundamental Research Funds for the Central Universities [40500-20104-222047]

向作者/读者索取更多资源

The newly synthesized nanospheres HPNs-NH2 showed high adsorption capacity and stability for hexavalent chromium in wastewater treatment, indicating their potential importance in environmental protection.
The synthesis of recyclable adsorbents with satisfactory adsorption properties is more beneficial to their value in environment-related applications. Organic porous polymer has become a potential adsorption material because of its convenient and effective modifiability and relatively high specific surface area. Here, we report for the first time a novel synthesis of ethylenediamine-modified hollow porous nanospheres (HPNs-NH2) via hyper-crosslinking mediated self-assembly strategy using polylactide-b-polystyrene-b-polyglycidyl methacrylate (PLA-b-PS-b-PGM) triblock copolymers as precursors, followed by further ring-opening of epoxy groups with ethylenediamine (EDA). Owing to the special multistage pore structure, high surface area and a large number of amino active sites, the obtained solid adsorbent HPNs-NH2 showed high adsorption capacity (493 mg/g) for Cr(VI), and its adsorption performance can still be maintained at a high level after eight cycles. These obvious advantages indicated that HPNs-NH2 is expected to play an important role in the treatment of hexavalent chromium in sewage.

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