A5090708990- Plant Micronutrient Interactions and Effects
- Catalytic Processes in Materials Science
- Nanoparticles: synthesis and applications
- Heavy metals in environment
- Soil Geostatistics and Mapping
- X-ray Spectroscopy and Fluorescence Analysis
- Catalysts for Methane Reforming
- Soybean genetics and cultivation
- Catalysis and Oxidation Reactions
- Soil Carbon and Nitrogen Dynamics
- Heavy Metals in Plants
- Selenium in Biological Systems
- Catalysis and Hydrodesulfurization Studies
- Plant Stress Responses and Tolerance
- Polymer-Based Agricultural Enhancements
- Geochemistry and Geologic Mapping
- Growth and nutrition in plants
- Spectroscopy and Chemometric Analyses
- Geochemistry and Elemental Analysis
- Advanced Photocatalysis Techniques
- Cassava research and cyanide
- Legume Nitrogen Fixing Symbiosis
- Phosphorus and nutrient management
- Nanomaterials for catalytic reactions
- Iron oxide chemistry and applications
Universidade de São Paulo
2016-2025
Université Mohammed VI Polytechnique
2023-2025
Sapienza University of Rome
2024
Nuclear Engineering Institute
2019-2022
Forest Science and Research Institute
2017-2020
Centre for Sustainable Energy
2020
Synchrotron soleil
2012-2018
Universidade Estadual Paulista (Unesp)
2008-2018
Centro Universitário de Araraquara
2018
Karlsruhe Institute of Technology
2012-2017
A nanodispersed intermetallic GaPd2/SiO2 catalyst is prepared by simple impregnation of industrially relevant high-surface-area SiO2 with Pd and Ga nitrates, followed drying, calcination, reduction in hydrogen. The tested for CO2 hydrogenation to methanol at ambient pressure, revealing that the intrinsic activity higher than conventional Cu/ZnO/Al2O3, while production undesired CO lower. combination complementary situ ex techniques are used investigate catalyst. In X-ray diffraction extended...
Abstract The efficiency of polymer electrolyte membrane fuel cells is strongly depending on the electrocatalyst performance, that is, its activity and stability. We have designed a catalyst material combines both, high for decisive cathodic oxygen reduction reaction associated with nanoscale Pt alloys, excellent durability an advanced nanostructured support. Owing to specific large active surface area, shows extraordinary mass values 1.0 A mg −1 . Moreover, retains initial area intrinsic...
An in-depth understanding of the active site requires advanced operando techniques and preparation defined catalysts. We elucidate here mechanism selective catalytic reduction NO by NH3 (NH3-SCR) over a Fe-ZSM-5 zeolite catalyst. 1.3 wt % with low nuclearity Fe sites was synthesized, tested in SCR reaction characterized UV-vis, X-ray absorption near edge structure (XANES), extended fine (EXAFS) spectroscopy. Next, this Fe-zeolite catalyst studied complementary high-energy-resolution...
The structure of copper sites in Cu-SSZ-13 during NH<sub>3</sub>-SCR was unravelled by a combination novel operando X-ray spectroscopic techniques.
Understanding nanoparticle root uptake and root-to-shoot transport might contribute to the use of nanotechnology in plant nutrition. This study performed time resolved experiments probe Zn uptake, biotransformation physiological effects on Phaseolus vulgaris (L.). Plants roots were exposed ZnO nanoparticles (40 300 nm) dispersions ZnSO4(aq) (100 1000 mg L-1) for 48 h. Near edge X-ray absorption spectroscopy showed that 40 nm was more easily dissolved by than ZnO. It also leaves found as a...
This work focuses on two aspects of gold-loaded tin dioxide gas sensing materials: The influence the size and dispersion gold effect investigation into mechanism at origin improved performance. For this purpose, a set selected well-characterized loaded materials were examined. results show that beneficial CO performance is observed for nanosized as well micron-sized entities, i.e., related to Au itself. Nevertheless, response strongly enhanced with increasing dispersion. Deeper insights...
Review of recent developments in quantitative analysis and microchemical imaging plants by LIBS XRF.
Nanoparticles properties such as solubility, tunable surface charges, and singular reactivity might be explored to improve the performance of fertilizers. Nevertheless, these unique may also bring risks environment since fate nanoparticles is poorly understood. This study investigated impact a range CuO sizes concentrations on germination seedling development Phaseolus vulgaris L. did not affect seed germination, but weight gain was promoted by 100 mg Cu L-1 inhibited 1 000 25 nm CuSO4. Most...
The long term stability and resistance toward carbon deposition, sulfur, chlorine, potassium of Ni/ZrO2 as a catalyst for the hydrodeoxygenation (HDO) guaiacol in 1-octanol (as model compound system bio-oil) has been investigated at 250 °C 100 bar trickle bed reactor setup. Without impurities feed good could be achieved over more than h operation, particularly sample prepared with small Ni particles, which minimized deposition. Exposing to 0.05 wt% sulfur resulted rapid deactivation complete...
There is still little information on the potential use of nanomaterials for seed nutrient enhancement through priming. The nanoparticles (NPs) in agriculture promising, but in-depth knowledge their interaction with plants required. aim this study was to evaluate effects different concentrations (1–5000 mg L–1) and sizes (20, 40, 60 nm) uncoated ZnO NP compared ionic ZnSO4 (positive control) common bean (Phaseolus vulgaris) germination. seeds were soaked aqueous dispersions 20 min. did not...
In vivo and micro chemical analytical methods have the potential to improve our understanding of plant metabolism development. Benchtop microprobe X-ray fluorescence spectroscopy (μ-XRF) presents a huge for facing this challenge. Excitation beams 30 μm 1 mm in diameter were employed address questions seed technology, phytopathology, physiology, bioremediation. Different elements analyzed several situations agronomic interest: (i) Examples μ-XRF yielding quantitative maps that reveal spatial...