Photocatalysis is an effective treatment technique for the removal of toxic pollutants present in water and wastewater. In this study, graphene@Fe-Ti binary oxide composites was prepared using a hydrothermal method and characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and Brunauer-Emmett-Teller surface area analysis. The prepared composite exhibited even distribution of the Fe-Ti binary oxide on the surface of graphene, with an average diameter of 16.4 nm and a surface area of 133.7 m²/g. The optical property was evaluated and the band gap was calculated to be 2.867 eV using solid-state UV–vis spectroscopy and the [F(R)hν]^1/2 plot. Lab-scale experiments were performed to evaluate the performance of graphene@Fe-Ti binary oxides to remove methyl blue (i.e. a dye) from wastewater. It was observed that the graphene loading had a significant effect on the photocatalytic activity of the composite and a composite with 20 % graphene showed the highest photocatalytic activity, with 100 % removal of the dye, after 20 min of irradiation time and a degradation rate constant of 0.213 min⁻¹. Besides, the possible photocatalytic dye degradation mechanism using graphene@Fe-Ti binary oxide composite has also been proposed.

光催化是去除水和废水中有毒污染物的有效处理技术。在这项研究中，使用水热法制备了石墨烯@ Fe-Ti二元氧化物复合材料，并通过扫描电子显微镜，透射电子显微镜，X射线衍射，傅立叶变换红外光谱和Brunauer-Emmett-Teller表面积分析对其进行了表征。制备的复合材料在石墨烯表面上显示出Fe-Ti二元氧化物的均匀分布，平均直径为16.4 nm，表面积为133.7 m ² / g。使用固态紫外-可见光谱法和[F（R）hν ] ^1/2，对光学性质进行了评估，并且带隙计算为2.867 eV情节。进行了实验室规模的实验，以评估石墨烯@ Fe-Ti二元氧化物从废水中去除甲基蓝（即染料）的性能。观察到石墨烯负载量对复合材料的光催化活性有显着影响，并且在20分钟的辐照时间后，具有20％石墨烯的复合材料显示出最高的光催化活性，其中100％去除了染料，降解速率常数为0.213min ^-1。此外，还提出了使用石墨烯@ Fe-Ti二元氧化物复合物的可能的光催化染料降解机理。