Fabrication of SnO₂/α-Fe₂O₃, SnO₂/α-Fe₂O₃–PB Heterostructure Thin Films: Enhanced Photodegradation and Peroxide Sensing

We report the synthesis of SnO2/α-Fe2O3 heterostructure thin films by employing two-step processes: galvanic and chemical deposition. Fe2O3 is a narrow band gap semiconductor and has short hole diffusion length. Therefore, the photogenerated electrons and holes are not easy to separate in Fe2O3. Combining Fe2O3 to SnO2, a wide-energy-gap semiconductor having suitable valence band and conduction band position is a promising candidate for the...