Fig. 2: Structural characterizations.
From: Converting waste PET plastics into automobile fuels and antifreeze components
a X-ray diffraction (XRD) patterns of Cu/SiO2 (dried) and CuNa/SiO2 (dried). b N2 adsorption–desorption of Cu/SiO2 (dried) and CuNa/SiO2 (dried). X-ray photoelectron spectroscopy (XPS) Cu 2p spectra of d Cu/SiO2 (reduced) and f CuNa/SiO2 (reduced). Cu LMM X-ray induced Auger electron spectroscopy (XAES) spectra of c Cu/SiO2 (reduced) and e CuNa/SiO2 (reduced). g Transmission electron microscopy (TEM) images of Cu/SiO2 (dried), h Cu/SiO2 (reduced) at a higher magnification, i CuNa/SiO2 (dried), and j CuNa/SiO2 (reduced) at higher magnification. k Transmission electron spectroscopy–energy dispersive X-ray spectroscopy (TEM-EDS) mappings of the elements in CuNa/SiO2: (l) Na, (m) Si, (n) O, and (o) Cu.
