Fig. 3. Micrographs of: SBA-15 with magnifications of 100 00× (a) and 300 00× (b); 1% Ni/SBA-15 with magnifications of 100 00× (c) and 300 00× (d); and 5% Ni/SBA-15 with magnifications of 100 00× (e) and 300 00× (f).
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