Hierarchically structured, well-dispersed Ti4+ cross-linked chitosan as an efficient and recyclable sponge-like adsorbent for anionic azo-dye removal

One novel of sponge-like Ti⁴⁺ cross-linked chitosan (SL-TiCs) was prepared. The SL-TiCs had multiply nano-layer twisted sheets and high content of Ti⁴⁺, which can provide plenty channels for mass transfer and active sites for dyes adsorption.