Novel Nano-Fe₂O₃-Co₃O₄ Modified Dolomite and Its Use as Highly Efficient Catalyst in the Ozonation of Ammonium Solution

Figure 4

SEM images of raw dolomite (a); activated dolomite (b); Fe₂O₃/dolomite (c); Fe₂O₃-Co₃O₄/dolomite (d).

(a)

(b)

(c)

(d)