Scheme 2. Schematic Representation of As-Synthesized (a) Cu2O Cubes and (b) Bulk g-C3N4 and (c) Interaction of Cu(II) Ions with the g-C3N4 and (d) g-C3N4/Cu2O Composites (the Backgrounds in (b–d) Are the Corresponding FESEM Images).
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