Research Article
Preparation of Improved p-n Junction NiO/TiO2 Nanotubes for Solar-Energy-Driven Light Photocatalysis
Figure 4
(a) Raman spectra of photocatalysts (a: TNTs; b: 0.5 M NiO/TNTs; c: 2.5 M NiO/TNTs) and (b) enlarged region of Raman shift range 100–200 cm−1.