The perovskite LaFeO₃ synthesized by sol-gel method was characterized physically and electrochemically and applied for the oxygen production under visible light. The thermal analysis (TG-ATD/DSC), X-ray diffraction (XRD), BET surface area, attenuated total reflection, scanning electron microscopy (SEM) analysis, laser granulometry, and electrical conductivity were used for its characterization. The XRD pattern indicates that LaFeO₃ is formed at 850 °C and the BET results gave a specific surface area of ~7 m²g⁻¹. The analysis by laser granulometry confirmed the agglomerated nature observed in the SEM micrographs and attributed to the fine powder obtained by sol-gel. The oxide exhibits a brown yellowish color with a forbidden band of 2.15 eV, determined from the diffuse reflectance data. The electrical properties indicate n-type semiconductor with activation energy of 0.20 eV. LaFeO₃ has a chemical stability in the pH range (5–14) with an exchange current of 35 μA cm⁻² at pH 12.8. The Mott–Schottky measurement (C⁻²–E) corroborates the n-type behavior with a flat band potential of 0.62 V_SCE and a density of 5.1 × 10¹⁸ cm⁻³. The perovskite LaFeO₃ was used for the oxygen production upon visible light irradiation and the good performance occurred with an evolution rate of 0.094 cm³ h⁻¹ (mg catalyst)^–1 in NaOH solution (0.1 M).

The perovskite LaFeO₃, synthesized by citrates sol-gel method and characterized by different physicals analysis, was used for the oxygen production upon visible light irradiation and the good performance occurred with an evolution rate of 0.094 cm³ h⁻¹ (mg catalyst)⁻¹ in NaOH solution (0.1 M).

对溶胶-凝胶法合成的钙钛矿型LaFeO ₃进行了物理和电化学表征，并在可见光下用于制氧。使用热分析（TG-ATD / DSC），X射线衍射（XRD），BET表面积，衰减全反射，扫描电子显微镜（SEM）分析，激光粒度分析和电导率进行表征。X射线衍射图谱表明LaFeO ₃在850°C下形成，BET结果给出的比表面积为〜7 m ² g ^-1。通过激光粒度分析法的分析证实了在SEM显微照片中观察到的附聚性质，并且归因于通过溶胶-凝胶获得的细粉。根据漫反射数据确定，该氧化物呈棕黄色，禁带为2.15 eV。电学性质表明活化能为0.20eV的n型半导体。LaFeO ₃在pH范围（5-14）下具有化学稳定性，在pH 12.8时的交换电流为35μAcm ^-2。Mott–Schottky测量（C ⁻² – E）证实了n型行为，其平带电势为0.62 V _SCE，密度为5.1×10 ¹⁸ 厘米^-3。钙钛矿的LaFeO ₃被用于氧气生产在可见光照射和良好的性能，为0.094 cm的释放速率发生³  ħ ^{- 1}（毫克催化剂）^-1在NaOH溶液（0.1 M）。

钙钛矿的LaFeO ₃，由柠檬酸盐的溶胶-凝胶法合成，其特征在于由不同的体检分析中，当可见光照射用于氧气生产和良好的性能，为0.094 cm的释放速率发生³  ħ ^{- 1}（毫克催化剂）^{- 1}的NaOH溶液（0.1 M）。