Nanoparticles of Lanthanum ferrite (LaFeO₃) and calcium doped lanthanum ferrite (La_1-xCa_xFeO₃, x= 0.1–0.3) with perovskite structure are synthesized by solution combustion method using polyethylene glycol as fuel. The prepared samples are characterized by X-ray diffraction, Fourier transform infrared spectroscopy, UV–Vis diffuse reflectance spectroscopy, and UV- Vis absorption spectroscopy. The photocatalytic activity was examined with Methylene blue (MB) dye degradation. The results revealed that as the dopant concentration increases, the band gap decreases tremendously but the photocatalytic degradation efficiency decreases. This may be due to the fact that the dopant acts as a site for electron-hole pair recombination which decreases the degradation efficiency.

铁氧体镧 (LaFeO ₃ ) 和掺钙铁氧体镧 (La _1-x Ca _x FeO ₃ ) 的纳米颗粒, x= 0.1–0.3) 具有钙钛矿结构，以聚乙二醇为燃料，通过溶液燃烧法合成。制备的样品通过 X 射线衍射、傅里叶变换红外光谱、UV-Vis 漫反射光谱和 UV-Vis 吸收光谱进行表征。用亚甲蓝 (MB) 染料降解检测光催化活性。结果表明，随着掺杂浓度的增加，带隙显着减小，但光催化降解效率降低。这可能是由于掺杂剂充当电子-空穴对复合的位点，这降低了降解效率。