Effects of Surfactants on High Regularity of 3D Porous Nickel for Zn²⁺ Adsorption Application

Figure 3

SEM morphology of PN film under different concentrations of 1,4-butynediol (0.01 (a, d), 0.03 (b, e), and 0.05 (c, f) g/100 mL).

(a)

(b)

(c)

(d)

(e)

(f)