ArticleRSC advances2021
Completely green synthesis of rose-shaped Au nanostructures and their catalytic applications.
Article in RSC advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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5 authors.
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Abstract
The importance of and demand for eco-friendly syntheses of metal nanocrystals are increasing. In this study, a novel protocol for the one-pot, template/seed-free, and completely green synthesis of rose-shaped Au nanostructures with unique three-dimensional hierarchical structures was developed. The synthesis of the nanostructures was carried out at room temperature using water as a reaction medium and an eco-friendly biopolymer (sodium salt of alginic acid (Na-alginate)) as a reducing agent. The morphologies of the Au nanostructures were controlled by adjusting the amount of capping ligand (polyvinylpyrrolidone (PVP)) in the reaction mixture, and a limited ligand protection (LLP) strategy was used to induce the formation of rose-shaped Au nanostructures. A formation mechanism for the rose-shaped Au nanostructures was proposed on the basis of structural characterizations and the shape evolution of the nanostructures. The unique structural features of the rose-shaped nanostructures, which include a high surface roughness, a large surface area-to-volume ratio, and abundant edges and sharp tips, motivated us to use them as a high-performance catalyst. They were used as an environmentally benign catalyst in an organic reaction to remove a hazardous chemical from an aqueous medium: specifically, the hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by sodium borohydride. Without an additional supporting material, the rose-shaped Au nanostructures showed outstanding catalytic activity that was maintained when the catalyst was recycled and used a total of five times.
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