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

Figure 5

UV-vis diffuse reflectance spectra of pristine E-ZnO, pristine R-ZnO, Au/E-ZnO, and Au/R-ZnO heterojunction nanocomposites for different Au NP deposition times (20 s, 40 s, and 80 s), respectively. The inset is an enlarged view of absorption edges for pristine ZnO and Au/ZnO with different Au NP deposition times (20 s, 40 s, and 80 s), respectively.