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Beilstein J. Nanotechnol. 2019, 10, 2516–2526, doi:10.3762/bjnano.10.242
Figure 1: Schematic images of the electric circuit equivalent to the system and the corresponding ZnFe2O4/rGO...
Figure 2: XRD patterns of the synthesized hollow spheres of pure ZnFe2O4 and the different ZnFe2O4/rGO compos...
Figure 3: FESEM images of the hollow spheres made of (a, b) pure ZnFe2O4 and composite ZnFe2O4/rGO with an rG...
Figure 4: EDX results of the ZnFe2O4/rGO samples containing 0.5 and 1 wt % rGO.
Figure 5: TEM images of (a) GO (b) hollow spheres of ZnFe2O4 and (c–f) hollow spheres of the ZnFe2O4/rGO comp...
Figure 6: TEM images of (a) the 0.5 wt % ZnFe2O4/rGO spheres and (b) the 1 wt % ZnFe2O4/rGO spheres. (c) HRTE...
Figure 7: Response of the hollow spheres made of pure ZnFe2O4 and the four different ZnFe2O4/rGO composites u...
Figure 8: Dynamic response/recovery curves of the pure ZnFe2O4 and the four ZnFe2O4/rGO gas sensors to (a) 0....
Figure 9: Linear response of (a) the hollow spheres of pure ZnFe2O4 and (b) of ZnFe2O4/rGO with 0.5 wt % rGO ...
Figure 10: Response of the 0.5 wt % ZnFe2O4/rGO sensor to 10 ppm of acetone, ethanol, methanol and formaldehyd...
Figure 11: Schematic of the proposed acetone sensing mechanism of ZnFe2O4/rGO. Band diagram of rGO and ZnFe2O4...