Oxygen Vacancy-Mediated Interfacial Charge Transfer of Au/ZnO Schottky Heterojunctions for Enhanced UV Photodegradation

Figure 7

X-ray photoelectron spectroscopy (XPS) characterizations for pristine R-ZnO and Au/R-ZnO 20 s. (a) XPS survey of scan spectrum for Au/R-ZnO 20 s, (b) Zn 2p of pristine R-ZnO, and Au/R-ZnO 20 s, respectively. (c) Au 4f for the sample of Au/R-ZnO 20 s. (d) O 1 s core level fitting of Au/R-ZnO 20 s.

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