fig7

Figure 7. (A) The XPS spectra of HNU-G4 and HNU-G4-Pb(II), along with the high-resolution fitting outcomes for (B) Pb4f, (C) O1s, (D) N1s. XPS: X-ray photoelectron spectroscopy.
Figure 7. (A) The XPS spectra of HNU-G4 and HNU-G4-Pb(II), along with the high-resolution fitting outcomes for (B) Pb4f, (C) O1s, (D) N1s. XPS: X-ray photoelectron spectroscopy.
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