Preparation and Characterization of Gold Nanodecahedral Particles/Graphite Oxide Composites
Gold nanomaterials are characterized by controllable size and shape, stable chemical properties, and good cata-lytic performance. However, gold nanoparticles are prone to irreversible aggregation in solution. The combination of gold nanoparticles and carriers can effectively improve this phenomenon. In the experiment, the solution synthesis method was used to in-situ generate gold nanodecahedral particles/graphite oxide composites in the suspension of graphite oxide with tetrachloroauric acid as the precursor. The morphology, structure, and surface chemical properties of the composite materi-al were characterized and analyzed using transmission electron microscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy. The results show that the gold nanoparticles with an average particle size of 30～50 nm and a decahedral cubic structure uniformly grow on the surface of graphite oxide. In the process of composite formation, the oxygen-containing functional groups on the graphene surface participated in the reaction, and a stable covalent bond was formed between gold nanoparticles and graphite oxide.
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