A. B. Aritonang, Y. K. Krisnandi, and J. Gunlazuardi, “Modification of TiO2Nanotube Arrays with N Doping and Ag Decorating for Enhanced Visible Light Photoelectrocatalytic Degradation of Methylene Blue”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 8, no. 1, pp. 234–241, Feb. 2018.