Fig. 9
From: A copper-doped ZIF-8: a high-performance catalyst for eco-friendly Ullmann and Biginelli reactions

SEM images of ZIF-8 (A–C) and Cu@ZIF-8 (D–F).
From: A copper-doped ZIF-8: a high-performance catalyst for eco-friendly Ullmann and Biginelli reactions

SEM images of ZIF-8 (A–C) and Cu@ZIF-8 (D–F).