Abstract An aqueous based, room temperature, and surfactant-free synthetic route is reported to yield high density of mono-dispersed Ag nanoparticles (AgNPs) supported on graphene oxide (GO) nanosheets. The retaining of oxygen functionalities on GO structure during the redox reaction offers GO the dual role of effective capping and supporting agents to realize the excellent dispersity and stability of the Ag/GO nanocomposites in aqueous solutions. Besides, the size and density of AgNPs anchored on GO are also modulated by controlling the GO, hydrazine, and Ag+ ions at the proper amounts in the growth solution. The combination of high density, pristine surface and the synergistic effect endow the Ag/GO nanocomposites highly catalytic activity towards the reduction of methylene blue (MB) and methyl orange (MO). This rapid, clean, and straightforward procedure offers an attractive avenue for the facile synthesis of noble metallic nanocomposites based on graphene oxides as both stabilizing and supporting materials.

中文翻译：

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在氧化石墨烯上一步和无表面活性剂合成高度分散的银纳米粒子作为去除有机染料的高效催化剂

摘要 据报道，一种水基、室温和不含表面活性剂的合成路线可产生高密度的单分散银纳米颗粒 (AgNPs)，该纳米颗粒负载在氧化石墨烯 (GO) 纳米片上。在氧化还原反应过程中，GO 结构上氧官能团的保留为 GO 提供了有效的封端剂和支持剂的双重作用，以实现 Ag/GO 纳米复合材料在水溶液中的优异分散性和稳定性。此外，还可以通过控制生长溶液中适量的 GO、肼和 Ag+ 离子来调节锚定在 GO 上的 AgNPs 的大小和密度。高密度、原始表面和协同效应的结合赋予了 Ag/GO 纳米复合材料对亚甲蓝 (MB) 和甲基橙 (MO) 还原的高度催化活性。这种快速、干净、