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.
