Preparation and Photocatalytic Properties of SnO₂ Coated on Nitrogen-Doped Carbon Nanotubes

Figure 3

(a) TEM image of pure CNx. (b) Low-resolution TEM image of CNx bundles fully coated with SnO₂. (c) Low-resolution TEM image of an individual CNx fully coated with SnO₂. (d) High-resolution TEM image in selected location.