Figure 3

(a) XRD patterns of LGO, SGO, SnO2 nanoparticles, SnO2@C@half-rGO, SnO2@C/rGO, and SnO2/C. The standard peak position and intensity of PDF#41-1445 SnO2 are shown as verticle lines. (b) Raman spectra of LGO, SGO, SnO2@C@half-rGO, and SnO2@C/rGO. (c) Nitrogen adsorption/desorption isotherms and (d) pore size distribution of SnO2@C@half-rGO, SnO2@C/rGO and SnO2/C.