fig4
From: Fabrication of MOF-derived porous Au@Co-ZnO nanostructures with excellent C2H5OH sensing performance
Figure 4. The nitrogen absorption and desorption isothermal curves of Au@Co-ZnO nanostructure and its contrast samples. A: pure ZnO; B: Co-ZnO; C: Au@ZnO; D Au@Co-ZnO. The illustrations are the pore size distribution curves of the corresponding samples.
