Fig. 3.
TEM images of SBA-15 and 30 % NiO/ZnO/SBA-15. a SBA-15. b lower-magnification TEM image of 30 % NiO/ZnO/SBA-15. c Higher-magnification TEM image of 30 % NiO/ZnO/SBA-15. d HRTEM of 30 % NiO/ZnO/SBA-15
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