A5003487405- Catalytic Processes in Materials Science
- X-ray Spectroscopy and Fluorescence Analysis
- Thermal Expansion and Ionic Conductivity
- Multiferroics and related materials
- Advanced Battery Materials and Technologies
- Magnetic and transport properties of perovskites and related materials
- Electrocatalysts for Energy Conversion
- Advanced Condensed Matter Physics
- Electron and X-Ray Spectroscopy Techniques
- ZnO doping and properties
- Nanoparticles: synthesis and applications
- Clay minerals and soil interactions
- Geochemistry and Elemental Analysis
- Ferroelectric and Piezoelectric Materials
- Catalysts for Methane Reforming
- Advancements in Battery Materials
- Radioactive element chemistry and processing
- Magnetic Properties and Synthesis of Ferrites
- Copper-based nanomaterials and applications
- Particle Detector Development and Performance
- Iron oxide chemistry and applications
- X-ray Diffraction in Crystallography
- Heavy metals in environment
- Nanoparticle-Based Drug Delivery
- Electrochemical Analysis and Applications
Elettra-Sincrotrone Trieste S.C.p.A.
2016-2025
Marche Polytechnic University
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2016-2023
University of Trieste
2007-2023
AREA Science Park
1990-2015
Centre National de la Recherche Scientifique
2006-2009
Sorbonne Université
2006-2009
Université Paris Cité
2009
Stanford Synchrotron Radiation Lightsource
2009
Institut de minéralogie, de physique des matériaux et de cosmochimie
2009
The optical layout of the XAFS beamline at ELETTRA is presented along with its powerful capabilities for collecting spectra in a wide energy range 2.4 – 27 keV. Recent developments around ensemble available instruments made different collection modes using various sample environments. In particular combined x-ray absorption and diffraction patterns can be collected even high temperature special version l'Aquila-Camerino furnace MAR image-plate detector. An automated control software allows...
Although the current production of oxide nanoparticles may be modest, wide range proposed applications and forecasted growth in has raised questions about potential impact these on environment human health. Iron have been for an increasing number biomedical although vitro toxicity depending particles coating evidenced. The aim this study was to examine cyto- genotoxicity dermal fibroblasts DMSA-coated maghemite (NmDMSA) as a function well-defined physicochemical states. Well-stabilized...
Although several laboratory studies showed that Mn-oxides are capable of oxidizing Cr(III) to Cr(VI), very few have reported evidence for such a reaction in natural systems. This study presents new this redox between and lateritic regolith developed on ultramafic rocks New Caledonia. The studied units with contrasting amounts major (Fe, Al, Si, Mg) trace (Mn, Cr, Ni, Co) elements, which related varying mineralogical compositions. Bulk XANES analyses show the occurrence Cr(VI) (up 20 wt %...
The grafting and sulfation of zirconia conformal monolayers on SBA-15 to create mesoporous catalysts tunable solid acid/base character is reported. Conformal sulfated (SZ) materials exhibit both Brönsted Lewis acidity, with the Brönsted/Lewis acid ratio increasing film thickness sulfate content. Grafted films also amphoteric character, whose site increases loading at expense base sites. Bilayer ZrO2/SBA-15 affords an ordered material a high upon excellent hydrothermal stability. Catalytic...
The understanding of the negative thermal expansion (NTE) mechanism remains challenging but critical for development NTE materials. This study sheds light on ScF3, one most outstanding materials with NTE. local dynamics ScF3 has been investigated by a combined analysis synchrotron-based X-ray total scattering, extended absorption fine structure, and neutron powder diffraction. Very interestingly, we observe that (i) Sc–F nearest-neighbor distance strongly expands increasing temperature,...
Abstract Thermal expansion properties of solids are fundamental interest and control thermal is important for practical applications but can be difficult to achieve. Many framework-type materials show negative when internal cages empty positive additional atoms or molecules fill voids present. Here we that redox intercalation offers an effective method from zero by insertion Li ions into the simple framework material ScF 3 , doped with 10% Fe enable reduction. The small concentration...
Magnetotactic bacteria biosynthesize magnetite nanoparticles of high structural and chemical purity that allow them to orientate in the geomagnetic field. In this work we have followed process biomineralization these nanoparticles. We performed a time-resolved study on magnetotactic Magnetospirillum gryphiswaldense strain MSR-1. From combination magnetic studies by means Fe K-edge X-ray absorption near edge structure (XANES) high-resolution transmission electron microscopy identified...
Oxidation behavior of nano-Fe0 particles in an anoxic environment was determined using different state-of-the-art analytical approaches, including high resolution transmission electron microscopy (HR-TEM) combined with energy filtered (EFTEM), X-ray absorption spectroscopy (XAS), and magnetic measurements. controlled experiments compared standard double distilled (DD) water, DD water spiked trichloroethene (TCE), TCE contaminated site water. Using HR-TEM EFTEM, we observed a surface oxide...
Ru/Al2O3 is a highly stable, but less active catalyst for methanation reactions. Herein we report an effective approach to significantly improve its performance in the of CO2/H2 mixtures. Highly and stable Ru/γ-Al2O3 catalysts were prepared by high-temperature treatment reductive reaction gas. Operando/in situ spectroscopy STEM imaging reveals that strongly improved activity, factors 5 14 CO CO2 methanation, accompanied flattening Ru nanoparticles formation basic hydroxylated alumina sites....
X-ray absorption spectroscopy is a synchrotron radiation based technique that able to provide information on both local structure and electronic properties in chemically selective manner. It can be used characterize the dynamic processes govern electrochemical energy storage batteries, shed light redox chemistry changes during galvanostatic cycling design cathode materials with improved properties. Operando XAS studies have been performed at beamline XAFS Elettra different systems. For...
This paper presents a comparison between several methods dedicated to the interpretation of V K-edge X-ray absorption near-edge structure (XANES) features. XANES spectra V-bearing standard compounds were measured in an effort evaluate advantages and limits each method. The include natural minerals synthetic containing vanadium at various oxidation state (from +3 +5) different symmetry (octahedral, tetrahedral, square pyramidal). Correlations normalized pre-edge peak area its centroid...
High surface area hydroxyapatites have been explored as biocompatible supports for antibacterial applications. Porosimetry, XRD, XPS and XAS reveal that Ag-doped mesoporous hydroxyapatite promotes the genesis of potent Ag3PO4 nanoparticles, effective against Staphylococcus aureus Pseudomonas aeruginosa.
The possibility of tuning the magnetic behaviour nanostructured 3d transition metal oxides has opened up path for extensive research activity in nanoscale world. In this work we report on how antiferromagnetism a bulk material can be broken when reducing its size under given threshold. We combined X-ray diffraction, high-resolution transmission electron microscopy, extended absorption fine structure and measurements order to describe influence microstructure morphology NiO nanoparticles...
A detailed investigation into Fe-based catalysts derived from phthalocyanine with mono, bi, and tri-metallic compositions is presented, focusing on how their processing structure affect oxygen reduction reaction activity in alkaline media.
We report here a study of the local order in R${}_{2}$Ti${}_{2}$O${}_{7}$, (R $=$ Y, Gd, and Dy) pyrochlores obtained by mechanical milling (MM) performed combining both Raman x-ray absorption (XAS) spectroscopies. In addition to as-milled annealed MM samples, measurements have been also recorded performing an situ thermal treatment range from ambient ${1300}^{\phantom{\rule{0.16em}{0ex}}\ensuremath{\circ}}$C. The analysis XAS data yields disentangled view evolution different degree...
It is known that silicon can be successfully replaced by germanium atoms in the synthesis of imogolite nanotubes, leading to shorter and larger AlGe nanotubes. Beside change morphology, two characteristics nanotube were recently discovered. nanotubes synthesized at much higher concentrations than AlSi imogolite. exists form both single-walled (SW) double-walled (DW) whereas DW imogolites have never been observed. In this article, we give details on physicochemical control over SW or...
Engineered nanomaterials (ENMs) are used to enhance the properties of many manufactured products and technologies. Increased use ENMs will inevitably lead their release into environment. An important route exposure is through waste stream, where enter wastewater treatment plants (WWTPs), undergo transformations, be discharged with treated effluent or biosolids. To better understand fate a common ENM in WWTPs, experiments laboratory-scale activated sludge reactors pristine...