Department of Chemistry, The City College of the City University of New York, 160 Convent Avenue, 10031, New York, NY, USA.
Dalton Trans. 2014 Feb 14;43(6):2670-5. doi: 10.1039/c3dt52573b. Epub 2013 Dec 11.
We report a seeded-growth process that results in the adhesion of size-controlled gold (Au) nanoparticles (NPs) to the surface of reduced graphene oxide (rGO), leading to the formation of rGO-Au nanocomposites. The synthesis approach involves the utilization of Au molecular precursors (i.e., the seeds) bonded to oxygen functionalities which intrinsically exist on GO. Upon reduction of the Au precursors, surface deposition of Au NPs is ensured. It is found that the size of Au NPs is controlled via the variation of precursor concentration in the growth solution. The redox chemistry between GO and Au precursors causes the reduction of GO to rGO and the generation of Au NPs on the surface of rGO. Microscopic and spectroscopic measurements have been performed to provide evidence for the suggested redox chemistry.
我们报告了一种种子生长过程，该过程导致尺寸可控的金（Au）纳米颗粒（NPs）附着在还原氧化石墨烯（rGO）的表面上，从而形成 rGO-Au 纳米复合材料。该合成方法涉及利用与 GO 上固有存在的氧官能团键合的 Au 分子前体（即种子）。在前体还原后，确保表面沉积 Au NPs。结果发现，通过改变生长溶液中的前体浓度可以控制 Au NPs 的尺寸。GO 和 Au 前体之间的氧化还原化学导致 GO 还原为 rGO 以及 rGO 表面上生成 Au NPs。已经进行了微观和光谱测量，以提供对所建议的氧化还原化学的证据。
