Abstract A novel thin film photocatalytic system, Fe2O3/Graphene supported by copper foil as a flexible substrate was produced in this study. Graphene was synthesized by using the chemical vapor deposition technique in a quartz tubular furnace. Fe2O3 catalyst layer was deposited by using magnetron sputtering technique. The catalyst was characterized by SEM, EDS, XRD, Confocal Raman spectroscopy, UV–vis diffuse reflectance spectroscopy and atomic force microscopy (AFM) methods. As inferred from the Raman spectrum, graphene was obtained as completely defect free and monolayer form. Fe2O3 layer was successfully coated on the graphene without amorphous region. Total surface roughness value was 852 nm which was determined by AFM in a 50 μm2 area. Photocatalytic activity of the system was followed by hydrogen peroxide decomposition under 14 W LED light bulb and the resulting product of the degradation namely oxygen gas was measured to numerically define the photocatalytic activity. As a result, graphene increased the activity by a factor 4. Hydrogen peroxide degradation produced 41 μ mole cm−2min−1 oxygen gas. This study demonstrated that graphene could be used an efficient charge carrier material to eliminate commonly known drawbacks of Fe2O3 to utilize it as a low cost visible active photocatalyst.

中文翻译：

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由 Fe2O3/2D 石墨烯/Cu 制成的薄膜光催化剂在太阳光谱的可见光区工作

摘要 本研究制备了一种新型薄膜光催化体系——Fe2O3/石墨烯，以铜箔为柔性基底。石墨烯是通过在石英管式炉中使用化学气相沉积技术合成的。Fe2O3催化剂层采用磁控溅射技术沉积。通过SEM、EDS、XRD、共焦拉曼光谱、紫外-可见漫反射光谱和原子力显微镜（AFM）方法对催化剂进行表征。从拉曼光谱推断，石墨烯以完全无缺陷的单层形式获得。Fe2O3 层成功地涂覆在没有非晶区的石墨烯上。总表面粗糙度值为 852 nm，这是通过 AFM 在 50 μm2 区域中确定的。该系统的光催化活性之后是在 14 W LED 灯泡下过氧化氢分解，并测量降解的所得产物，即氧气，以数值定义光催化活性。结果，石墨烯将活性提高了 4 倍。过氧化氢降解产生了 41 μmol cm-2min-1 的氧气。该研究表明，石墨烯可用作有效的电荷载体材料，以消除 Fe2O3 众所周知的缺点，将其用作低成本的可见光活性光催化剂。