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. 2015 Mar 11;5:8939. doi: 10.1038/srep08939

Figure 4.

Figure 4

(a) XRD, (b) Raman, and (c) S2p XPS spectra of the GO sheets and SnO2-rGO composites. For easy characterization, the corresponding porous films were prepared on the glass substrate under the same conditions as those on the ceramic tube and then they were scraped off to form into powders and measured.