Fig. 4From: Preparation and application of FNAOSiPPEA/Cu(II) as a novel magnetite almondshell based Lewis acid-Bronsted base nano-catalyst for the synthesis of pyrimidobenzothiazolesXRD diffraction patterns of (a) Fe3O4 (b) FNAOSiPPEA and (c) FNAOSiPPEA/Cu(II)Back to article page