120 research outputs found
Hydrogen Production by Ethanol Steam Reforming on Ni-Based Catalysts: Effect of the Support and of CaO and Au Doping
Nickel-based catalysts were investigated for hydrogen production
by ethanol steam reforming. A suitable support was
assessed among the metal oxides TiO2, ZrO2 and CeO2. Alongside
catalytic testing with ethanol-water mixture, a series of
characterization measurements were carried out: N2-physisorption,
XRD, TPR, TPO, CO2-TPD, SEM, AAS and IC. Zirconium and
cerium oxides proved to be suitable supports, even if both still
suffer from coking phenomena. The effects of doping both by
calcium oxide and gold nanoparticles were checked. Doping by
calcium oxide prevented deactivation and highly increased the
hydrogen yield. Moreover, the addition of gold nanoparticles
greatly improved the hydrogen yield. The combination of the
two dopants resulted in the best performing catalyst: the basic
doping by CaO and the promotion of the water gas shift
reaction by gold nanoparticles contributed to the highest
hydrogen production
Noble Metal Nanoparticles for Biosensing Applications
In the last decade the use of nanomaterials has been having a great impact in biosensing. In particular, the unique properties of noble metal nanoparticles have allowed for the development of new biosensing platforms with enhanced capabilities in the specific detection of bioanalytes. Noble metal nanoparticles show unique physicochemical properties (such as ease of functionalization via simple chemistry and high surface-to-volume ratios) that allied with their unique spectral and optical properties have prompted the development of a plethora of biosensing platforms. Additionally, they also provide an additional or enhanced layer of application for commonly used techniques, such as fluorescence, infrared and Raman spectroscopy. Herein we review the use of noble metal nanoparticles for biosensing strategiesâfrom synthesis and functionalization to integration in molecular diagnostics platforms, with special focus on those that have made their way into the diagnostics laboratory
Customization of the surface of nanoparticles for creating controlled nanostructures with unique optical properties
Customization of the surface of nanoparticles for creating controlled nanostructures with unique optical properties
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