In this work we have synthesized a series of binary TiO₂/Bi₂O₃ and ternary TiO₂/Bi₂O₃/CuO composites having different amount of Bi₂O₃ and CuO using the facile solution combustion approach. The characteristics of samples were identified using the X-ray diffraction (XRD), X- ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), photoluminescence (PL) spectroscopy and UV–vis diffuse reflectance spectroscopy (UVDRS) techniques. The Rhodamine B was taken as the organic pollutant to determine the photocatalytic efficiency of the materials under ultra-low power consumption visible LEDs as the source of light. The results demonstrate that the synthesized compounds possess good crystallinity and improved optical characteristics after introduction of Bi₂O₃ and CuO. The ternary sample having 10% of Bi₂O₃ and 10% of CuO showed the highest photoremoval of RhB which might be due of the formation of heterojunctions and improved optical characteristics towards the visible region. The beauty of the synthesized samples is their fast rate of removal of pollutant under visible LEDs which is beneficial for development of cost-effective water purification technique.

在这项工作中，我们合成了一系列具有不同Bi ₂ O ₃含量的二元TiO ₂ / Bi ₂ O ₃和三元TiO ₂ / Bi ₂ O ₃ / CuO复合材料。和CuO使用易溶溶液燃烧方法。使用X射线衍射（XRD），X射线光电子能谱（XPS），场发射扫描电子显微镜（FESEM），光致发光（PL）光谱和UV-vis漫反射光谱（UVDRS）技术来鉴定样品的特征。罗丹明B被用作有机污染物，以确定材料在超低功耗可见光LED作为光源下的光催化效率。结果表明，引入Bi ₂ O ₃和CuO后，合成的化合物具有良好的结晶度和改善的光学特性。具有10％Bi ₂ O ₃的三元样品10％的CuO表现出RhB的最高光去除率，这可能是由于异质结的形成和对可见区的光学特性提高所致。合成样品的优点在于它们在可见光下能快速去除污染物，这有利于开发具有成本效益的净水技术。