Nano-Polyoxotungstate [Cu₂₀P₈W₄₈] Immobilized on Magnetic Nanoparticles as an Excellent Heterogeneous Catalyst Nanoreactors for Green Reduction of Nitrophenol Compounds

Figure 13

Comparison of UV-Vis spectra of the first and eighth cycles in the reduction of 4-NP by [Fe₃O₄@SiO₂-NH₂-Cu₂₀P₈W₄₈].