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Freshly prepared SRHMGs (a-1, b-1, c-1, d-1, and e-1), SEM images (a-2, b-2, c-2, d-2, and e-2) and size distribution (a-3, b-3, c-3, d-3, and e-3) of H40 (a-1, a-2, and a-3), H40AP16 (b-1, b-2, and b-3), H40PAA8 (c-1, c-2, and c-3), H40Fe16 (d-1, d-2, and d-3), and H40AP8PAA4 (e-1, e-2, and e-3).
