The global concern over water pollution caused by contaminants of emerging concern has been the subject of several studies due to the complexity of treatment. Here, the synthesis of a graphene oxide-based magnetic material (GO@Fe₃O₄) produced according to a modified Hummers’ method followed by a hydrothermal reaction was proposed; then, its application as a photocatalyst in clonazepam photo-Fenton degradation was investigated. Several characterization analyses were performed to analyze the structure, functionalization and magnetic properties of the composite. A 2³ factorial design was used for the optimization procedure to investigate the effect of [H₂O₂], GO@Fe₃O₄ dose and pH on clonazepam degradation. Adsorption experiments demonstrated that GO@Fe₃O₄ could not adsorb clonazepam. Photo-Fenton kinetics showed that total degradation of clonazepam was achieved within 5 min, and the experimental data were better fitted to the PFO model. A comparative study of clonazepam degradation by different processes highlighted that the heterogeneous photo-Fenton process was more efficient than homogeneous processes. The radical scavenging test showed that \({O}_{2}^{\cdot -}\) was the main active free radical in the degradation reaction, followed by hydroxyl radicals (^•OH) and holes (h⁺) in the valence layer; accordingly, a mechanism of degradation was proposed to describe the process.

由于处理的复杂性，全球对新出现的污染物引起的水污染的关注已成为多项研究的主题。这里，提出了根据改进的Hummers法然后进行水热反应合成氧化石墨烯基磁性材料（GO@Fe ₃ O ₄ ）；然后，研究了其作为光催化剂在氯硝西泮光芬顿降解中的应用。进行了多项表征分析来分析复合材料的结构、功能化和磁性能。采用 2 ³因子设计进行优化程序，研究 [H ₂ O ₂ ]、GO@Fe ₃ O ₄剂量和 pH 对氯硝西泮降解的影响。吸附实验表明GO@Fe ₃ O ₄不能吸附氯硝西泮。 Photo-Fenton动力学表明氯硝西泮在5 min内实现完全降解，实验数据更好地拟合PFO模型。不同工艺降解氯硝西泮的比较研究强调，非均相光芬顿工艺比均相工艺更有效。自由基清除测试表明， \({O}_{2}^{\cdot -}\)是降解反应中主要的活性自由基，其次是羟基自由基( ^· OH)和空穴自由基(h ⁺ )。价层；因此，提出了一种降解机制来描述该过程。