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

Figure 4

TEM (a) and SEM (b) images of [Fe₃O₄@SiO₂-NH₂-Cu₂₀P₈W₄₈].

(a)

(b)