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A novel biomass pulp fibre (PF)-based colorimetric sensor was prepared by grafting l-lysine (l-lys) onto the surface of PFs via a Schiff base reaction. The grafted l-lys contained two specific synergistic recognition groups (–COOH and –NH2), which only recognize Ag+. The as-prepared sensor (DAPF-l-lys) showed excellent selective recognition of Ag+ and an obvious visual colour change from light-yellow...
A novel PEI-grafted magnetic cellulose (Fe3O4/MCC-PEI) with high amino density was prepared by grafting PEI onto the surface of magnetic cellulose in NaOH/urea aqueous solvent. The embedding of Fe3O4 into cellulose provided excellent magnetic responsiveness for recycling the adsorbent in the magnetic field. The adsorbent for Cr(VI) removal from aqueous solution overcame the disadvantages of adsorbent...
Viscose fiber was oxidized with sodium periodate to prepare a reactive dialdehyde viscose fiber (DAVF) containing abundant aldehyde groups. A solid amine adsorbent (DAVF-PEI) with high amino density for CO2 capture was then prepared by modifying DAVF with polyethylenimine (PEI). Response surface methodology (RSM) based on a three-level, three-factorial design was used to optimize the synthesis conditions...
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