Here, we have demonstrated for the first time the synthesis of a novel LaNiSbWO₄-G modified by polyaniline (PANI) via a sonochemical process. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images show well-crystallized small nanoparticles in the photocatalysts. FTIR, DRS, Raman, and XPS were also used for analyses. LaNiSbWO₄-G-PANI showed efficient photocatalytic activity in degrading the widely used organic dye Safranin-O (SO) & gallic acid under visible light (λ > 420 nm). Along with high performance, the presence of free electrons further demonstrated the photocatalytic performance of LaNiSbWO₄-G-PANI. The best photocatalytic performance was obtained using the LaNiSbWO₄-G-PANI (LNSWGP) composite, as its performance was approximately three times higher than that of pure LaNiSbWO₄ (LNSW). Under the same conditions, the LNSWGP photocatalyst showed 92 % gallic acid and 84 % SO photodegraded after only 180 min. The enhanced photocatalytic activity could be attributed to the synergetic effect of PANI and LaNiSbWO₄-G, which promoted the migration efficiency of the photogenerated electron-hole. The results suggest possible photocatalytic mechanisms of LaNiSbWO₄-G-PANI that can be exploited for the appropriate modulation of its photocatalytic performance.

在这里，我们首次证明了通过声化学方法合成的新型聚苯胺（PANI）修饰的LaNiSbWO ₄ -G。扫描电子显微镜（SEM）和透射电子显微镜（TEM）图像显示了光催化剂中结晶良好的小纳米颗粒。FTIR，DRS，拉曼和XPS也用于分析。LaNiSbWO ₄ -G-PANI在可见光（λ > 420 nm）下降解广泛使用的有机染料Safranin-O（SO）和没食子酸具有高效的光催化活性。除高性能外，自由电子的存在进一步证明了LaNiSbWO ₄ -G-PANI的光催化性能。使用LaNiSbWO ₄获得了最佳的光催化性能-G-PANI（LNSWGP）复合材料，因为它的性能大约是纯LaNiSbWO ₄（LNSW）的三倍。在相同条件下，仅180分钟后，LNSWGP光催化剂显示出92％的没食子酸和84％的SO降解。增强的光催化活性可以归因于PANI和LaNiSbWO ₄ -G的协同作用，从而提高了光生电子空穴的迁移效率。结果表明，LaNiSbWO ₄ -G-PANI的可能的光催化机理可用于适当调节其光催化性能。