Single-Atom Ni Heterogeneous Catalysts Supported UiO-66 Structure: Synthesis and Catalytic Activities

Figure 8

UV-vis spectra of 4-NP solution before and after adding NaBH₄ (a); the time-dependent successive reduction of 4-NP with NaBH₄ without catalyst (b); reduction of 4-NP in the presence of UiO-66/Ni1.0 (c); 4-NP conversion (%) of different catalysts (d).

(a)

(b)

(c)

(d)