An understanding of collective influence of Fe-loading and calcination on changes in the crystal structure, morphology, phase composition, and photocatalytic activity of titanate-nanostructures is investigated here. Bare sodium-titanate nanotubes (TNT) having a BET-surface-area (S-BET) of 176m(2)g(-1) were transformed to sodium-titanate nanorods (TNT(S)) of S-BET=21m(2)g(-1) when calcined at 800 degrees C. Whereas, calcination of Fe-loaded-TNT at 800 degrees C led to a variety of fragmented particles having different crystal structures, S-BET (21-39m(2)g(-1)), shape, and sizes (50-70nm) attributed to the strain induced thermal-decomposition of TNT after Fe-loading. The comparative photocatalytic activity of as-prepared catalysts under UV-light irradiation was evaluated by photooxidation of naphthalene to CO2, with the identification of its photoproduced intermediates by GC-MS analysis. These results are well explained in correlation with the surface area, size, and shape of as-prepared catalysts.