Mesoporous Silica Supported Au Nanoparticles with Controlled Size as Efficient Heterogeneous Catalyst for Aerobic Oxidation of Alcohols

Figure 2

TEM images and size distributions for (a) Au-1, (b) Au-2, (c) Au-3, and (d) Au-4 catalysts.

(a)

(b)

(c)

(d)