Figure 1.
FT-IR spectra of (a) Fe3O4, Fe3O4@SiO2–NH2, MNPs@SiO2-SB-THCA, and MNPs@SiO2-SB-THCTA (heterogeneous method) and (b) Fe3O4@SiO2, SB-THCA, SB-THCTA, MNPs@SiO2-SB-THCA, and MNPs@SiO2-SB-THCTA (homogeneous method).
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