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TEM images of sample A (a) as-synthesized (NC: not calcined), (b) calcined at 450°C and (c) calcined at 600°C. HRTEM images of sample A (d) as-synthesized, (e) calcined at 450°C, (f) STEM of sample A of (f-1) as-synthesized and (f-2) calcined at 450°C, with element profiles.
