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

Figure 1

(a) FESEM top-view image of TNTs before ultrasonication; (b) top and cross-sectional (inset) images of TNTs after ultrasonication; (c, d) cross-sectional and top-view images of NiO/TNTs (0.5 M); (e) EDX of NiO/TNTs (0.5 M).

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