Journal
JOURNAL OF MATERIALS SCIENCE
Volume 55, Issue 8, Pages 3259-3278Publisher
SPRINGER
DOI: 10.1007/s10853-019-04191-3
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Funding
- National Key R&D Program of China [2016YFC0403003]
- Key R&D Program of Hunan Province [2018SK2026, 2018SK2043]
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A superb adsorbent for Cr(VI) removal with a high adsorption capacity and acidic resistance was facilely synthesized via in situ hydrothermal cross-linking and reduction reaction of poly-Schiff base using m-phenylenediamine and glutaraldehyde as feedstock. The hydrothermal process effectively facilitated the condensation between aldehyde and amine group to strengthen the chemical structure by cross-linking the polymeric chains. Morphological evolution of the polymer via disaggregation and reassembly to finally form regular core-shell configuration was observed. The produced nanoparticles possess the excellent adsorption performance (833.3 mg g(-1)), far beyond most of the reported adsorbents, and exhibit fine reusability. The possible adsorption mechanism can be attributed to Cr(VI) electrostatic adsorption followed by redox reaction and chelation.
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