Fig. 2From: Eggshell Membrane-Templated MnO2 Nanoparticles: Facile Synthesis and Tetracycline Hydrochloride DecontaminationThe SEM images of MnO2 NPs/ESM with different scale bars (2 μm (a) and 200 nm (b)). The TEM (c) and HRTEM (d) images of MnO2 NPs, the scale bars were 10 nm and 5 nm, respectivelyBack to article page