Fig. 5.
XPS spectra of Bi4Ti3O12, Ag3PO4, and 10% Bi4Ti3O12/Ag3PO4. a XPS survey scan spectra. b O 1s XPS spectra. c Ag 3d XPS spectra. d P 2p XPS spectra. e Bi 4f XPS spectra. f Ti 2p XPS spectra
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