Light-Triggered Catalytic Performance Enhancement Using Magnetic Nanomotor Ensembles
Degradation of 4-NP using MNEs. (a) Absorption spectra of processed 4-NP solution obtained at different times under shaking on a shaker at 300 rpm as the control group, (b) the application of a magnetic field (B) only, (c) a magnetic field and light (L) with the power density of 0.5 W/cm2, (d) a magnetic field and light with the power density of 2 W/cm2, and (e) light with the power density of 0.5 W/cm2 and shaking. (f) Absorption peaks and (g) as a function of time for the processing under light. (h) Absorption peaks and (i) as a function of time for the processing under the integrated application of magnetic field and light. The slopes of the linear fitting lines indicate the reaction rates, and a larger slope implies a faster reaction. The magnetic field strength and frequency were 4 mT and 10 Hz, respectively. The c and c0 represent the concentrations of 4-NP at time t and 0 s.