a b s t r a c tThe formation of self-organised titanium dioxide (TiO 2 ) nanotubes array was achieved by anodisation of pure titanium foil in a standard two-electrode bath consisting of 1 M Na 2 SO 4 . Excess NH 4 F (5 wt%) was used in this work and the pH was kept constant at 3. Control over the dimension of the nanotubes was successfully established in this work by altering the anodisation voltage. Three important observations were made: (i) there is a threshold voltage above which nanotubes will form, (ii) within the range of voltages where nanotubes form, samples made at low voltage consist of nanotubes with small pore size (<40 nm) and nanotubes diameter increases with voltage until a maximum voltage of 25 V where the nanotubular array started to diminish and (iii) the length of the nanotubes also increases with anodisation voltage. Photocatalytic degradation of methylene blue (MB) was successfully performed on the titania nanotubes with diameter of 100 nm.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.