Photocatalysis and Bandgap Engineering Using ZnO Nanocomposites

Figure 3

Electron microscopy images of common morphologies of ZnO 1D nanostructures reported in literature. (a) Nanorods with sharp tips [229]. (b) Nanobelt. The inset clearly shows a rectangular belt-shape width [230]. (c) Nanocombs with secondary arms [229]. (d) More complex mixed morphologies [231] and (e) long nanowires [232]. Interestingly some of these morphologies may be considered as 2D structures but conventionally they come under 1D category [233].