“…with other cations, including alkaline ions (Li + , Na + , K + , Rb + , Cs + ) [20], transition (Co 2+ , Ni 2+ , Fe 3+ , Cu 2+ , Zn 2+ , Cd 2+ ) [20,26,27] and noble metals (Au, Pt, Pd, Ru, Ag) [28,29]. Along with the iron titanate nanotubes, the literature is moderately limited [9,21,26,27,[30][31][32][33][34][35][36][37][38]. Attention has been focused on the electrochemistry [32,38], photocatalysis [31,33,36,37], molecular segregation [27], optical and magnetic properties [21,26,27,31,33] of Fe-titanates.…”