Fig. 4. Results for the reduction of 4-nip (4.5 × 10−5 mol L−1) with NaBH4 (0.2 mol L−1): (a) UV-vis spectra in the presence of 10 μL of a Ag@Au NPs/CNF 0.26 wt(%) suspension of the catalyst; (b) apparent rate constants for the suspensions of the obtained catalysts (empty symbols) and CNF-borate cross-linked films of bimetallic catalysts (Ag@Au NPs/CNF-B(1%) and Ag@Pt NPs/CNF-B(1%), filled symbols) fitted to a pseudo-first-order kinetic model; (c) profile of the catalytic performance of Ag@Au NPs/CNF-B films as a function of the cross-linker content; (d) pseudo-first-order kinetic model fitting of Ag@Au NPs/CNF-B films as a function of the cross-linker content; (e) consecutive catalytic cycles for the Ag@Au NPs/CNF catalyst suspension, and (f) consecutive catalytic cycles for the Ag@Au NPs/CNF-B(5%) film.
