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Journal Article

Hydrothermal synthesis of chemically stable cross-linked poly-Schiff base for efficient Cr(VI) removal

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Zhang, Liyuan
Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Citation

Ren, L., Yang, Z., Jin, L., Yang, W., Shi, Y., Wang, S., et al. (2020). Hydrothermal synthesis of chemically stable cross-linked poly-Schiff base for efficient Cr(VI) removal. Journal of Materials Science, 55(8), 3259-3278. doi:10.1007/s10853-019-04191-3.

Abstract

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.