Fabrication of MoO₃ nanowire-based membrane devices for the selective adsorption of cationic dyes from aqueous solutions with high performance and reusability

A series of ultralong (up to tens of micrometers) MoO₃ nanowire-based membranes were synthesized for the treatment of aqueous solutions containing the cationic dyes methylene blue (MB) and rhodamine B (RhB). This treatment method possesses extremely rapid and superhigh adsorbability (up to 521 and 321 mg/g for MB and RhB, respectively), as well excellent selective adsorption ability of cationic dyes with respect to the anionic dye methyl orange (MO). Moreover, the cationic dyes on the membrane can be desorbed easily, and reusability is good.