Preparation of Improved p-n Junction NiO/TiO₂ Nanotubes for Solar-Energy-Driven Light Photocatalysis

Figure 3

(a) X-ray diffraction pattern of photocatalysts (a: TNTs; b: 0.5 M NiO/TNTs; c: 2.5 M NiO/TNTs) and (b) enlarged XRD peaks of crystal plane (1 0 1).

(a)

(b)