“…After degradation, these materials are easily recycled by use of a permanent magnet. 45,158,166,177,199,200,202,[234][235][236][237][238][239][240][241][242][243][244][245][246][247] For example, Liang et al 248 237 The final product reached a maximum specific surface area of 35.27 m 2 g À1 , rhodamine B degradation efficiency of 98% after 2 hours of visible light irradiation and an M s value of 0.9 emu g À1 , demonstrating its potential for use as practical separable photocatalysts. As these MNPs render the fibres ferromagnetic, or superparamagnetic, they can be attracted to external magnetic fields.…”