In situ green growth of uniform and naked Ag nanoparticles on graphene oxide at room temperature and its enhanced catalytic performance
| Autor: | Huiying Pan, Minghao liu, Xing-Wei Han |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Nanostructure
Materials science Oxide Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis law.invention Metal chemistry.chemical_compound law General Materials Science Nanocomposite Graphene 4-Nitrophenol General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Atomic and Molecular Physics and Optics 0104 chemical sciences Chemical engineering chemistry Modeling and Simulation visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Journal of Nanoparticle Research. 22 |
| ISSN: | 1572-896X 1388-0764 |
| DOI: | 10.1007/s11051-020-04902-x |
| Popis: | In situ growth of naked Ag nanoparticles on graphene oxide was achieved following a simple, green, and environment-friendly one-step stirring method. In the absence of extra reductant and stabilizer, the naked Ag nanoparticles formed on the surface of GO via a spontaneous redox reaction between Ag+ and GO at room temperature. The morphology and microstructure of the resultant heterogeneous nanostructures were characterized by various spectroscopic and microscopic techniques systematically. The characterization results showed that the naked metallic Ag nanoparticles with an average diameter of 4.31 ± 0.13 nm distribute homogeneously and tend to “stand” in line on GO. The well-known catalytic hydrogenation of 4-nitrophenol by NaBH4 was carried out to investigate the potential catalytic activity of the obtained heterogeneous Ag/GO nanocomposite. The obtained Ag/GO nanocomposite exhibited high catalytic ability with the apparent kinetics constant of 1.856 min−1 and high turnover frequency of 2131.6 h−1 and high structural and performance stability. It is believed that the small size and naked surface of the Ag nanoparticles, which provide abundant exposed catalytically active sites, facilitate greatly in improving the catalytic performance of Ag/GO. It is anticipated that the proposed green method is extendible to prepare other efficient noble-metal/GO nanocatalyst. |
| Databáze: | OpenAIRE |
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