Figure 3 | Scientific Reports

Figure 3

From: High-Density Three-Dimension Graphene Macroscopic Objects for High-Capacity Removal of Heavy Metal Ions

Figure 3

Comparison between commercial Ni foam-grown graphene and our porous cross-linked Ni-grown graphene.

Ni foams are not removed (a) and removed (b). The porous Ni catalysts are not etched (c) and etched (d). The insets are the magnified images of (c) and (d), respectively. SEM images show that the pore size of commercial Ni foam-grown graphene is 1–2 orders of magnitude larger than that of our porous cross-linked Ni-grown graphene.

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