Niobate photo catalysts draw significant attention in the fields of both pollutant degradation and H₂ generation. However, their chemically inert nature limits the synthetic routes available to obtain these semiconductors. In this work, we report the synthesis of bismuth niobate (Bi₅Nb₃O₁₅) by a simple solvothermal method and incorporation of this material with nitrogen doped reduced graphene oxide for the first time. The synthesized catalysts were characterized by XRD, Raman, N₂ adsorption-desorption isotherm, DRS-UV, FESEM and TEM analyses. XRD patterns exhibited single crystalline orthorhombic structure for Bi₅Nb₃O₁₅. Electron microscopy showed plate-like structure for Bi₅Nb₃O₁₅/N-rGO. UV–vis diffuse reflectance spectra revealed red shifting of reduced graphene oxide and nitrogen doped reduced graphene oxide composite catalysts indicating its visible activity. This novel Bi₅Nb₃O₁₅/N-doped reduced graphene oxide showed higher photocatalytic decolorization of reactive dyes namely reactive blue 19 and reactive orange 16 under visible light than bare Bi₅Nb₃O₁₅orBi₅Nb₃O₁₅/rGO.

铌酸盐光催化剂在污染物降解和H ₂产生领域都引起了极大的关注。然而，它们的化学惰性性质限制了可用于获得这些半导体的合成途径。在这项工作中，我们报告了通过简单的溶剂热法合成铌酸铋（Bi ₅ Nb ₃ O ₁₅）的方法，并且首次将这种材料与氮掺杂的还原氧化石墨烯结合使用。通过XRD，拉曼，N ₂吸附-脱附等温线，DRS-UV，FESEM和TEM分析对合成的催化剂进行了表征。XRD图谱显示Bi ₅ Nb ₃ O _15的单晶正交晶体结构。电子显微镜显示Bi ₅ Nb ₃ O ₁₅ / N-rGO的板状结构。紫外可见漫反射光谱显示还原的氧化石墨烯和氮掺杂的还原的氧化石墨烯复合催化剂的红移表明其可见活性。这种新颖的Bi ₅ Nb ₃ O ₁₅ / N掺杂还原氧化石墨烯在可见光下比裸Bi ₅ Nb ₃ O _15或Bi ₅ Nb ₃ O ₁₅ / rGO具有更高的光催化脱色活性染料，即活性蓝19和活性橙16 。