Publication

pH-Sensitive Gold Nanoparticle Catalysts for the Aerobic Oxidation of Alcohols

Paul Joseph Dyson, Ning Yan, Yuan Yuan
2011
Journal Articles

Abstract

Gold nanoparticles (NPs) stabilized by carboxylate modified polyvinylpyrrolidone have been prepared and fully characterized. The gold NPs efficiently catalyze the aerobic oxidation of benzyl alcohol in water at ambient temperature and are easily separated from the reaction mixture by lowering the pH of the solution, causing the NPs to precipitate. The mechanism of the precipitation process has been studied. Due to the efficiency of this process, the NPs may be reused as catalysts by readjusting their pH.

Official source

https://infoscience.epfl.ch/entities/publication/70e1e3c9-4afc-43b7-ab23-d3554d12d490

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Paul Joseph Dyson, Ning Yan, Yuan Yuan
2011
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/70e1e3c9-4afc-43b7-ab23-d3554d12d490

About this result

Related concepts (11)

Colloidal gold

Colloidal gold is a sol or colloidal suspension of nanoparticles of gold in a fluid, usually water. The colloid is coloured usually either wine red (for spherical particles less than 100 nm) or blue-purple (for larger spherical particles or nanorods). Due to their optical, electronic, and molecular-recognition properties, gold nanoparticles are the subject of substantial research, with many potential or promised applications in a wide variety of areas, including electron microscopy, electronics, nanotechnology, materials science, and biomedicine.

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A nanoparticle or ultrafine particle is usually defined as a particle of matter that is between 1 and 100 nanometres (nm) in diameter. The term is sometimes used for larger particles, up to 500 nm, or fibers and tubes that are less than 100 nm in only two directions. At the lowest range, metal particles smaller than 1 nm are usually called atom clusters instead.

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