“…The diffraction of anatase TiO 2 A(004) and anatase TiO 2 (220) planes, related to the formation of TiO 2 NT, is observed on the peaks at 2θ = 38.4 , 40.2 , and 70.6 . [43,44] Regarding the specific surface area (SSA) from XRD, some recent work [44] used the value of crystalline size Obtained from XRD in the range (0-80 ) as an evidence NTs. [35] (c) Typical top view of SEM images and magnification, (d) corresponding particle size distribution histograms of NiO NPs/TiO 2 NTs-N 2 electrode to prove the formation of NTs.…”