fig3
Figure 3. (A) XPS spectra of M-C3N4-x samples; High-resolution (B) C 1s spectra (C) N 1s spectra and (D) O 1s spectra of M-C3N4-2. XPS: X-ray photoelectron spectrometer.
Figure 3. (A) XPS spectra of M-C3N4-x samples; High-resolution (B) C 1s spectra (C) N 1s spectra and (D) O 1s spectra of M-C3N4-2. XPS: X-ray photoelectron spectrometer.
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