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. 2018 Jul 18;8(7):544. doi: 10.3390/nano8070544

Figure 7.

Figure 7

XPS spectra of samples β-Cu2V2O7/TiO2 after Electrochemical work (ab); and of r-GO/ β-Cu2V2O7/TiO2 (ce) after photoelectrochemical (PEC) work.