Herein, a novel PANI@Fe₂O₃@TiO2 (PANI@TF) composite containing different amounts of polyaniline was synthesized by in situ polymerization of aniline monomer in the presence of TF. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), BET surface area, Diffuse reflectance spectroscopy (DRS), X-ray photoelectron (XPS), and scanning electron microscopy (SEM-EDS) were used to study the phase structure, morphology, and optical properties of the synthesized PANI@TF composites. Moreover, for the first time, the photocatalytic property of the as-synthesized PANI@TF composites has been evaluated via the decolorization of MB under sun-like illumination. The findings confirmed that all the PANI@TF ternary composites with different PANI content showed enhanced visible-light photocatalytic activity for methylene blue (MB) dye degradation compared to pure Fe₂O₃@TiO2. The highest degradation efficiency for MB via 1% PANI@TF ternary catalyst reached 96% after 2 h under sun-like illumination, which was 4.3 higher than TF. Finally, a plausible photocatalytic mechanism for the improved photocatalytic activity was proposed to guide further improvement of its photocatalytic performance.

在此，通过苯胺单体在TF存在下的原位聚合，合成了一种含有不同含量聚苯胺的新型PANI@Fe ₂ O ₃ @TiO2 (PANI@TF)复合材料。X射线衍射（XRD），傅里叶变换红外光谱 (FTIR)、BET 比表面积、漫反射光谱 (DRS)、X 射线光电子 (XPS) 和扫描电子显微镜 (SEM-EDS) 用于研究相结构、形貌和光学性质合成的 PANI@TF 复合材料。此外，首次通过在类太阳光照下对 MB 进行脱色评估了合成后的 PANI@TF 复合材料的光催化性能。研究结果证实，_{与纯 Fe 2}O₃相比，具有不同PANI含量的所有 PANI@TF 三元复合材料均显示出增强的亚甲基蓝 (MB) 染料降解的可见光光催化活性。@二氧化钛。1% PANI@TF 三元催化剂在类太阳光照下 2 h 后 MB 的最高降解效率达到 96%，比 TF 高 4.3。最后，提出了一种提高光催化活性的合理光催化机理，以指导进一步提高其光催化性能。