access icon free Fungal biomolecules assisted biosynthesis of Au–Ag alloy nanoparticles and evaluation of their catalytic property

The catalytic reduction of methylene blue was studied using biosynthesised gold–silver (Au–Ag) alloy nanoparticles (NPs). The fungal biomass of Trichoderma harzianum was used as a reducing and stabilising agent in the synthesis of Au–Ag alloy NPs. The synthesised NPs were well characterised by UV–vis spectroscopy, dynamic light scattering, X-ray diffraction, transmission electron microscopy, energy dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy. The plausible synthesis mechanism involved in the formation of Au–Ag alloy NPs was also discussed with diagrammatic representation. A series of experiments was performed to investigate the catalytic activity of the as-prepared Au–Ag alloy NPs and found that the alloy NPs show excellent catalytic activity.

Inspec keywords: ultraviolet spectra; nanofabrication; light scattering; transmission electron microscopy; nanoparticles; gold alloys; visible spectra; molecular biophysics; dyes; silver alloys; nanobiotechnology; Fourier transform infrared spectra; reduction (chemical); X-ray chemical analysis; catalysis; microorganisms; X-ray diffraction

Other keywords: X-ray diffraction; fungal biomolecules assisted biosynthesis; AuAg; energy dispersive X-ray spectroscopy; catalytic property; Fourier transform infrared spectroscopy; UV-visible spectroscopy; Trichoderma harzianum; reducing agent; diagrammatic representation; stabilising agent; catalytic reduction; methylene blue; transmission electron microscopy; dynamic light scattering; gold-silver alloy nanoparticles

Subjects: Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Specific chemical reactions; reaction mechanisms; Biomolecular interactions, charge transfer complexes; Visible and ultraviolet spectra of metals, semimetals, and alloys; Electromagnetic radiation spectrometry (chemical analysis); Infrared and Raman spectra in metals; Optical properties of metals and metallic alloys (thin films, low-dimensional and nanoscale structures); Heterogeneous catalysis at surfaces and other surface reactions; Other methods of nanofabrication

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http://iet.metastore.ingenta.com/content/journals/10.1049/iet-nbt.2014.0043
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