Figure 2: Structure of the MSS.

(a and b) SEM images of the MSS at different magnifications. (c) TEM image of the MSS. The scale bar in a,b and c is 20 μm, 100 nm and 100 nm, respectively. (d) and (e) Pore size distribution and isothermal curves of the MSS sample before and after carbon deposition. (f) XRD pattern of the MSS material.