fig1

Figure 1. Morphological and structural characterization of the prepared samples. (A) Powder XRD patterns of pristine NFM and MgF₂-loaded at different loading amounts, (B) XRD patterns of MgF₂ before and after calcination, (C) XRD patterns of NFM@10%MgF₂ sample. (D-G) SEM images of pristine NFM, NFM@0.5%MgF₂, NFM@1%MgF₂, and NFM@2%MgF₂. (H and I) TEM images of pristine NFM and NFM@1%MgF₂, (J) HAADF-STEM image of NFM@1%MgF₂ and the corresponding elemental mapping results.