Figure 3. The MoO 3 -based membrane (5 µ m) was tested to measure its ability to selectively separate Figure 3. The MoO 3 -based membrane (5 µm) was tested to measure its ability to selectively separate various dyes at 10 ppm: ( a ) MB + MO; ( b ) RhB + MO; ( c ) MB + RhB; ( d ) Adsorption capacity for various dyes at 10 ppm: ( a ) MB + MO; ( b ) RhB + MO; ( c ) MB + RhB; ( d ) Adsorption capacity for various various dyes. dyes.