Preparation of N-Doped Composite Shell Encapsulated Iron Nanoparticles and Their Magnetic, Adsorptive, and Photocatalytic Properties

Figure 1

TEM images of products (a) A, (b) B, (c) D, and (d) E. The inserts are the images at higher magnification and show the core-shell structure of the nanoparticles.

(a)

(b)

(c)

(d)