“…3 In recent years, there have been quite a few techniques developed for preparing such materials, for example, porous alumina, 4 stearylamine, 5 ionic liquids, 6 mesostructured silica, 7 sodium hexametaphosphate, 8 apoferritin, 9 polyvinylpyrrolidone, 10 sol-gel, 11,12,13 anodic aluminum oxide 14 and microemulsion. 15,16 Although considerable efforts have been put on the syntheses of PBAs materials, relatively few attempts 17 have been on the produce of the tubular Prussian blue analogues, let alone the cobalt-iron PBAs nanotubes.…”