FIGURE 1. (a) XRD patterns of zinc oxide; (b) XRD patterns of titanium dioxide.
tion, which means that r1P is smaller than rN. The molar Gibbs free energy of adsorption becomes much more negative in the presence of smaller diameter nano-adsorbents. This indicates that the
TABLE 2
nanoadsorption is more feasible and the molar Gibbs free energy decreases when the diameter of the nanoparticle decreases. In addition, due to a decreasing surface tension for larger surface areas, there is a linear relation between the molar Gibbs free energy and the reciprocal of the diameter of the nano-adsorbent. 2.5. The equilibrium constant for adsorption