Nano-sized Fe₂Zr_2-xW_xO₇ system was prepared using the Pacini method where x = 0, 0.05, 0.1 and 0.15. All the samples were characterized using chemical analysis, X-ray diffraction (XRD), Fourier-transform infrared (FT-IR), transmission electron microscopy (TEM), UV–vis diffuse reflectance measurements (DRS) and surface area measurements. The undoped Fe₂Zr₂O₇ was crystallised in the cubic fluorite phase as a major phase in addition to rhombohedral phase of Fe₂O₃ and monoclinic phase of ZrO₂ as the minor phases. Meanwhile, single cubic fluorite phase was defined for Fe₂Zr_0.85W_0.15O₇ sample. The last has the lowest band gap (1.69 eV) and the highest surface area (106 m²/g). From TEM, the average particle size of the prepared samples was in the range of (3–7 nm). The photocatalytic efficiency of the prepared Fe₂Zr_2-xW_xO₇ system was manifested by the degradation of methylene blue and real textile wastewater of blue colour. Ascending degradation efficiency was exhibited with increasing tungsten concentration which is in accordance with their band gap as well as their surface area values. The degradation rate using Fe₂Zr_0.85W_0.15O₇ sample obeys the pseudo-first order kinetic at the optimum degradation conditions (1.5 g/L catalyst and pH11). Fe₂Zr_0.85W_0.15O₇ showed promising photocatalytic activity for real textile wastewater where the 69% COD removal was obtained under the same conditions used for methylene blue degradation.

纳米尺寸的Fe ₂ Zr _2-x W _x O ₇系统是使用帕西尼方法制备的，其中x = 0、0.05、0.1和0.15。使用化学分析，X射线衍射（XRD），傅立叶变换红外（FT-IR），透射电子显微镜（TEM），紫外可见漫反射测量（DRS）和表面积测量对所有样品进行表征。除了Fe ₂ O _3的菱面体相和ZrO _2的单斜晶相作为次要相之外，未掺杂的Fe ₂ Zr ₂ O ₇以立方萤石相作为主相结晶。同时，Fe ₂定义为单立方萤石相Zr _0.85 W _0.15 O ₇样品。最后一个具有最低的带隙（1.69 eV）和最高的表面积（106 m ² / g）。根据TEM，所制备样品的平均粒径在（3–7 nm）范围内。制备的Fe ₂ Zr _2-x W _x O ₇体系的光催化效率表现为亚甲基蓝和真实的蓝色纺织废水的降解。随着钨浓度的增加，降解效率提高，这取决于其带隙及其表面积值。使用Fe ₂ Zr _0.85 W _0.15的降解率O ₇样品在最佳降解条件（1.5 g / L催化剂和pH11）下服从拟一级动力学。Fe ₂ Zr _0.85 W _0.15 O ₇对真实的纺织品废水显示出有希望的光催化活性，其中在与亚甲基蓝降解相同的条件下获得了69％的COD去除率。