Facile in-situ synthesis of PEI-Pt modified bacterial cellulose bio-adsorbent and its distinctly selective adsorption of anionic dyes

Polyethylenimine (PEI) caged platinum nanomaterials modified bacterial cellulose (PEI-Pt@BC) bio-adsorbent was synthesized via a facile in-situ reduction method and this versatile membrane has a preferential absorbability of anionic dye than cationic analogue mainly attributed to the interaction between positive-charged PEI and dye molecules.