In this study, a simple thermal reduction process is used to synthesize a rGO-Ca₂Fe₂O₅ (rGO-CFO) nanocomposite, with the morphological and optical characteristics of the CFO nanomaterial being modified by the rGO incorporation. The interface between rGO nanosheets and CFO nanoparticles facilitates efficient charge separation and resulting transfer of photogenerated charge carriers across the rGO nanosheets, demonstrated from photoluminescence and Mott-Schottky tests. Compared to CFO (2.1 eV), rGO-CFO has a reduced band gap energy of 1.9 eV. As synthesized nanocomposites were initially optimized and utilized for photodegradation of organic effluent Methylene blue (MB). An addition of 5 wt% rGO to the CFO demonstrated an improved photodegradation efficiency (97%) compared to bare CFO (72%). An active species trapping experiment was used to assess the MB photodegradation mechanism. The results demonstrate that hydroxyl radicals and holes are the major active species involved in photodegradation. The optimized composition (5rGO-CFO) was further tested for degradation of Bisphenol-A and Tetracycline (antibiotic). Altogether, these investigations show that the rGO-CFO is a highly efficient photocatalyst that can be used to remediate emerging contaminants in sunlight.

在本研究中，采用简单的热还原工艺合成了rGO-Ca ₂ Fe ₂ O ₅ (rGO-CFO)纳米复合材料，并通过rGO的掺入改变了CFO纳米材料的形态和光学特性。光致发光和莫特肖特基测试证明，rGO 纳米片和 CFO 纳米颗粒之间的界面有利于有效的电荷分离，并促进光生电荷载流子在 rGO 纳米片上的转移。与 CFO (2.1 eV) 相比，rGO-CFO 的带隙能量降低了 1.9 eV。合成的纳米复合材料最初被优化并用于有机废水亚甲基蓝（MB）的光降解。与裸 CFO (72%) 相比，向 CFO 添加 5 wt% rGO 显示出更高的光降解效率 (97%)。活性物质捕获实验用于评估 MB 光降解机制。结果表明，羟基自由基和空穴是参与光降解的主要活性物质。进一步测试了优化组合物 (5rGO-CFO) 的双酚 A 和四环素（抗生素）降解情况。总而言之，这些研究表明 rGO-CFO 是一种高效光催化剂，可用于修复阳光下新出现的污染物。