A5021419766- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Catalysis and Hydrodesulfurization Studies
- Catalysts for Methane Reforming
- Catalysis for Biomass Conversion
- Boron and Carbon Nanomaterials Research
- MXene and MAX Phase Materials
- Metal and Thin Film Mechanics
- Graphene research and applications
- Supercapacitor Materials and Fabrication
- Magnetic Properties and Synthesis of Ferrites
- Marine and fisheries research
- Insect and Arachnid Ecology and Behavior
- Pediatric Urology and Nephrology Studies
- Amphibian and Reptile Biology
- Copper-based nanomaterials and applications
- Biofuel production and bioconversion
- Ichthyology and Marine Biology
- biodegradable polymer synthesis and properties
- Marine and coastal plant biology
- Nanomaterials for catalytic reactions
- Education Pedagogy and Practices
- Asymmetric Hydrogenation and Catalysis
- Gas Sensing Nanomaterials and Sensors
- Kidney Stones and Urolithiasis Treatments
Universidade Federal do Rio de Janeiro
2011-2022
Faculdade Meridional
2016
Rede de Química e Tecnologia
2014-2016
Universidade do Estado do Rio de Janeiro
2016
Centro Universitário da Cidade
2015
Financiadora de Estudos e Projetos
2014
Copper and palladium/copper nanoparticles supported on reduced graphene oxide catalysts were synthesized evaluated for the selective NO reduction by CO. The characterized XRD, nitrogen adsorption–desorption, TGA, XPS, TPR, in situ STEM, HRTEM. STEM HRTEM results showed high metal dispersions rGO. XPS presence of Cu Pd species. copper rGO occurred two steps CuOx/rGOc, while that CuOx-PdOy/rGOc one step temperatures lower than 350 °C. Noteworthy is XRD structure was not affected after at...
The performance of the Mn-Na2WO4/SiO2 catalyst for oxidative coupling methane (OCM) has been ascribed to crystalline phases that are not present at reaction temperatures (>700 °C). evolution W and Mn sites structure was monitored via in situ TPO-XRD, -Raman, -XANES spectroscopies. TPO-XRD shows identified on Mn-Na2WO4/SiO2, Na2WO4/SiO2, WO3/SiO2 catalysts room temperature do exist relevant OCM temperatures. γ → β α-WO3, α β-cristobalite, cubic orthorhombic molten-Na2WO4 phase transitions...
An efficient method of synthesis the vanadium nitride (VN) at low temperature is evaluated, and a mechanism for crystallization process proposed in this paper. From mixture ammonium m-vanadate with guanidinium carbonate an intermediate, (GmV), produced. GmV decomposed underwent interesting structural transformations increasing temperatures. This studied by theoretical (periodic DFT calculations) experimental (51V MAS NMR, XRD, FTIR, elemental analysis) methods. It that first into reactive...
Herein, we present periodic DFT-based calculations on the thiophene and its H-derivatives adsorption reaction pathways over niobium carbide nitride cubic face-centered (001) surfaces.
An easy and efficient method ("guanidinium route") to synthesize vanadium nitride (VN) is evaluated in this paper. Initially, ammonium m-vanadate was mixed with guanidinium carbonate, producing an important intermediate, (GmV), through a solid-state reaction. GmV decomposed as function of the temperature studied TGA, DRX, FT-Infrared, Temperature-Programmed Surface Reaction (TPSR) DFT. We show that transformed into bulk crystalline VN below 800 °C. XPS, periodic DFT calculations, elemental...
Alcatrazes island and surrounding islets, 35 km from the mainland in southeastern Brazil, are a young archipelago created by rising sea levels around 7,000 years BP. The main covers 135 ha is only to harbour forest, four islets showing exposed rock, grasses sedges. A total of 82 species, which six breeding seabirds, has been recorded archipelago. Another 11 seabirds were documented waters islands. holds largest Magnificent Frigatebird, Fregata magnificens, colony southern Atlantic, as well...
Nanosized nickel (Ni) and copper (Cu) doped ceria (CeO<sub>2</sub>) have attracted attention as solid solutions for energy- environment-related applications.
Introduction: In special situations such as malrotated or ectopic kidneys and UPJ stenosis treatment of renal lithiasis can be challenging. these rare cases laparoscopy indicated. Objective: Describe the Laparoscopic-assisted rigid nephroscopy performed via transpyelic approach report feasibility. Patients methods: We present two caliceal lithiasis. The first is a patient that ESWL previous percutaneous lithotripsy have failed, with pelvic kidney where laparoscopic dissection pelvis was...
Óxidos de Co, Fe e ferrita Co foram preparados, caracterizados tiveram sua atividade avaliada na reação oxidação seletiva do monóxido carbono (SELOX). Os catalisadores preparados hidrotermicamente a 180 °C presença glicose. Em seguida, os por DRX, MEV, TPR, análise textural e, fim, avaliados em questão. resultados obtidos para testes com programação temperatura (TPRe) revelaram que nanoestrutura cobalto apresentou uma superior SELOX CO quando comparada às nanoestruturas dos óxidos isolados.
Abstract The conversion of glycerol into lactic acid in alkaline medium using heterogeneous catalysts has been highlighted and proved to be an efficient alternative the conventional fermentative route. This work investigated production from copper obtained hydrotalcite-like precursors a continuous flow reaction system effect different loading on catalytic behaviors terms yield selectivity acid. were synthesized by coprecipitation method characterized XRF, XRD, N 2 adsorption-desorption, H...