A series of novel catalysts with bimetallic Sn-W oxides uniformly dispersed on reduced graphene oxide (denoted as Sn-W/RGO) were successfully prepared via a conventional one-pot hydrothermal method. Interestingly, it was found that the introduction of Sn could significantly improve the catalytic activities compared with single WO₃/graphene catalyst for selective oxidation of alcohols using H₂O₂ without organic solvents and additives. Subsequently, the catalysts were characterized by FT-IR, XRD, Raman, FESEM, EDS, HRTEM, XPS and N₂ adsorption-desorption to investigate the promotional synergistic effect of Sn among catalyst structure, surface properties and catalytic performance. The results revealed that the incorporation of Sn had induced the formation of hexagonal WO₃ with dominant exposed (001) and (200) planes, meanwhile, doping Sn could dramatically increase the specific surface area, change the structural properties and enhance the interactions between Sn-W oxides and graphene, which were beneficial to the improvement of catalytic performance. Additionally, reaction parameters (temperature, time, oxidant dosage and catalyst amount) were also explored. Both aryl and alkyl alcohols exhibited high conversion and selectivity to corresponding target products over the catalyst. And delightedly, the robust catalyst could be reused for five times without significant loss in catalytic efficiency. This work demonstrates the promotional synergistic effect of Sn in a novel Sn-doped WO₃/RGO catalyst and makes it a promising candidate in green oxidation of alcohols under mild reaction conditions.

通过常规的一锅水热法成功地制备了一系列新型的双金属锡-钨氧化物均匀分布在还原的氧化石墨烯上的催化剂（称为锡-钨/ RGO）。有趣的是，发现与不使用有机溶剂和添加剂的使用H ₂ O ₂的醇选择性氧化的单一WO ₃ /石墨烯催化剂相比，Sn的引入可以显着提高催化活性。随后，通过FT-IR，XRD，拉曼，FESEM，EDS，HRTEM，XPS和N ₂对催化剂进行了表征。吸附-解吸研究锡在催化剂结构，表面性质和催化性能之间的协同增效作用。结果表明，Sn的掺入诱导了六方晶WO ₃的形成。同时，以（001）和（200）面为主的掺杂，掺杂Sn可以显着增加比表面积，改变结构性质，增强Sn-W氧化物与石墨烯之间的相互作用，有利于提高催化性能。此外，还研究了反应参数（温度，时间，氧化剂用量和催化剂用量）。在催化剂上，芳基和烷基醇都显示出高转化率和对相应目标产物的选择性。令人高兴的是，该耐用型催化剂可以重复使用五次，而不会显着降低催化效率。这项工作证明了锡在新型掺锡WO _3中的促进增效作用。/ RGO催化剂，使其在温和的反应条件下成为醇绿色氧化的有前途的候选者。