Fig. 1. SEM images of pure ZnO and 1∶150Ag/ZnO
(a), (c) low-magnification ZnO and 1∶150Ag/ZnO; (b), (d) high-magnification ZnOand 1∶150Ag/ZnO

Fig. 2. XRD patterns of Pure ZnO and 1∶150Ag/ZnO

Fig. 3. Raman spectra of Pure ZnO and 1∶150Ag/ZnO at ambient pressure

Fig. 4. High-pressure Raman spectrum of Pure ZnO

Fig. 5. High-pressure Raman spectrum of the 1∶150Ag/ZnO