Structural and magnetic properties of titanate nano-heterostructures decorated with iron based nanoparticles

The Use of Ultra-Small Fe3O4 Magnetic Nanoparticles for Hydrothermal Synthesis of Fe3+-Doped Titanate Nanotubes

“…The magnetic properties of ion-doped titanate nanotubes strongly depend on the method of their preparation and the type of ions used. For example, Fe 3+ -doping method presented in [ 34 ] yields hysteresis loops suggesting both paramagnetic and ferromagnetic contributions, the Co-doped titanate nanotubes in [ 41 ] show room temperature ferromagnetism, Gd 3+ -doped titanate nanotubes in [ 43 ] show low-temperature paramagnetism, Mn 2+ -doped titanate nanotubes in [ 42 ] show room temperature ferromagnetism.…”

“…The methods of doping titanate nanotubes with ions depend on the specific application. The examples of ions that are often used are Fe 3+ [ 34 , 35 , 36 , 37 , 38 ], Co 2+ [ 39 , 40 , 41 ], Ni 2+ [ 39 ], Mn 2+ [ 42 ], Gd 3+ [ 43 ], Yb 3+ [ 44 ], Nd 3+ [ 44 ], Au 3+ [ 45 ], Pt 2+ [ 45 ]. They show how diverse the methods of doping TiO 2 nanotubes are.…”

“…In this case, the nanoparticles did not degrade and they influenced the diameter of the nanotubes. Our method is also complementary to the methods of delivering iron ions directly from aqueous iron (III) chloride solution as in paper [ 34 ] where a microwave-assisted hydrothermal method was used. It is also worth mentioning the method which is a combination of the sol-gel method which produces Fe-doped TiO 2 powder and the hydrothermal method for the synthesis of nanotubes as in the publication [ 35 ].…”