Fig. 2
Structure, morphology, and composition characterization of PEG/Cu-BDC. a TEM images of Cu2O. b TEM images of PEG/Cu-BDC. c XRD patterns of Cu2O and PEG/Cu-BDC. d XPS spectrum of the PEG/Cu-BDC. e XPS spectrum of Cu 2p in PEG/Cu-BDC. f FTIR spectrum of PEG/Cu-BDC. g TGA curves of PEG/Cu-BDC in air and N2. h N2 absorption–desorption isotherms of PEG/Cu-BDC activated at 120, 200, and 250 ℃ for 12 h prior to the tests, respectively