Semiconductor nanoheterostructures with different weight ratios were successfully fabricated by hydrothermal method. X-ray diffraction analysis indicates that the samples were composed of alpha-Fe2O3 and SnO2. HRTEM images confirmed the immobilization of SnO2 nanoparticles on the surface of alpha-Fe2O3 hexagonal discs. Optical studies reveal that the band gaps of the samples enlarge from 1.862(2) eV to 1.9931(7) eV with increase in SnO2 weight ratio. Hysteresis behavior clearly displayed a shift of loops toward field axis for nanoheterostructures. From the ZFC curve an increase of Morin transition from 230K to 240K was noticed when the SnO2 weight ratio increases. (C) 2014 Elsevier B.V. All rights reserved.