Designing high-performance catalyst for the oxidation of cyclohexane (CyH) into value-added products like cyclohexanol and cyclohexanone (the mixture called KA oil) is of paramount significance in chemical industry. Herein, the catalytic activity of graphene oxide coupled with Ag and Fe₃O₄ nanopaticles composites (GO-Ag&Fe₃O₄ NPs) was investigated to understand the synergistic effect between Ag and Fe₃O₄ NPs in photothermal oxidation of CyH. The comparative experiments between thermal and photothermal catalysis indicated that: (a) Conversion efficiency was facilitated by temperature rise, but less than 50 % of selectivity to KA oil was obtained at high temperature (140 °C); (b) Higher selectivity and milder condition were achieved by photothermal catalysis comparing to that of the thermal catalysis; (c) Ag NPs played more important role in photocatalysis, while thermocatalysis was intensified by Fe₃O₄ NPs. Using 1.5 MPa of dry air as oxidant, 6.6 % of CyH conversion with over 98 % of selectivity was gained by GO-Ag&Fe₃O₄ NPs. Additionally, no obvious decline in catalytic efficiency was observed after 5 cycles. The concept of photothermal cooperation for CyH oxidation over GO-Ag&Fe₃O₄ NPs may provide a new approach for the partial oxidation of saturated CH and the design of high-performance catalysts.

设计用于将环己烷（CyH）氧化为增值产品（如环己醇和环己酮（称为KA油的混合物））的高性能催化剂在化学工业中至关重要。在本文中，研究了氧化石墨烯与Ag和Fe ₃ O ₄纳米颗粒复合材料（GO-Ag＆Fe ₃ O ₄ NPs）的催化活性，以了解Ag和Fe ₃ O ₄的协同作用。NP在CyH的光热氧化中。热和光热催化的对比实验表明：（a）温度升高促进了转化效率，但在高温（140°C）下对KA油的选择性不到50％；（b）与热催化相比，光热催化具有更高的选择性和更温和的条件；（c）Ag NPs在光催化中起着更重要的作用，而Fe ₃ O ₄ NPs增强了热催化作用。使用1.5 MPa的干燥空气作为氧化剂，GO-Ag＆Fe ₃ O ₄获得6.6％的CyH转化率和超过98％的选择性。NP。另外，在5个循环后未观察到催化效率的明显下降。在GO-Ag＆Fe ₃ O ₄ NPs上进行CyH氧化的光热合作概念可能为饱和C H的部分氧化和高性能催化剂的设计提供一种新方法。