The α-Fe₂O₃/Cu₂O heterostructure (HS) was prepared via the hydrothermal precipitation method and used in the kinetic study of the methylene blue (MB) photodegradation. The samples were subjected to the photoluminescence spectroscopy (PL) to evaluate the e/h recombination rate and the results showed a significant decrease in PL intensity of the heterostructure with respect to the individual semiconductors. The band gap energy of 2.28 eV for the single Fe₂O₃ semiconductor was red-shifted to 1.95 eV by introducing Cu₂O species. EDX analysis of the heterostructure showed 74.36% (65.66% atomic%) Cu and 22.21% (22.32 atomic%) Fe in weight%. The heterostructure showed an increased photocatalytic activity towards MB molecules with respect to the individual systems. The degradation process obeyed the first order Hinshelwood kinetic model and an apparent first-order rate constant of 0.025 min⁻¹ with a t_1/2 value of 27 min was obtained. The degradation extent of MB was confirmed by the chemical oxygen demand (COD) method that of results confirmed about 90% of MB molecules can be removed during the photodegradation process in the applied conditions.

所述的α-Fe ₂ ö ₃ / Cu的₂ O异质结（HS）通过水热沉淀方法制备，并在亚甲基蓝（MB）光降解的动力学研究中使用。样品经过光致发光光谱（PL）评估e / h重组率，结果表明，相对于单个半导体，异质结构的PL强度显着降低。通过引入Cu ₂将单个Fe ₂ O ₃半导体的2.28 eV的带隙能量红移至1.95 eVO种。异质结构的EDX分析显示，以重量％计，Cu为74.36％（原子百分比为65.6％），Fe为22.21％（原子百分比为22.32％）。相对于单个系统，异质结构显示出对MB分子的增加的光催化活性。降解过程服从一级Hinshelwood动力学模型，并且获得了表观一级速率常数为0.025 min ^-1和_1/2值为27 min。通过化学需氧量（COD）方法确认了MB的降解程度，结果证实在所应用的条件下，光降解过程中可以去除约90％的MB分子。