A5058490744- Gas Sensing Nanomaterials and Sensors
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- ZnO doping and properties
- Transition Metal Oxide Nanomaterials
- Magnetic Properties and Synthesis of Ferrites
- Catalytic Processes in Materials Science
- Pigment Synthesis and Properties
- Copper-based nanomaterials and applications
- Iron oxide chemistry and applications
- Ferroelectric and Piezoelectric Materials
- Advanced Nanomaterials in Catalysis
- Hydrogels: synthesis, properties, applications
- Bone Tissue Engineering Materials
- Polymer Nanocomposites and Properties
- Nanomaterials for catalytic reactions
- Multiferroics and related materials
- Luminescence Properties of Advanced Materials
- Advanced Sensor and Energy Harvesting Materials
- Electrocatalysts for Energy Conversion
- Nanoparticles: synthesis and applications
- 3D Printing in Biomedical Research
- Electrochemical sensors and biosensors
- Titanium Alloys Microstructure and Properties
- Thin-Film Transistor Technologies
Romanian Academy
2015-2024
University of Bucharest
2015
Academy of Romanian Scientists
2007-2012
Institute of Physical Chemistry
2004
The cobalt ferrite (CoFe 2 O 4 ) and silver-cobalt (Ag-CoFe nanoparticles were obtained through self-combustion wet ferritization methods using aqueous extracts of Hibiscus rosa-sinensis flower leaf. X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, magnetic measurements used for the characterization oxide powders. antimicrobial activity against Gram-positive Gram-negative bacteria, as well fungal strains, was investigated by qualitative quantitative...
The present work aims at comparatively studying the effects of concentrations a monomer (10–30 wt% based on whole hydrogel composition), crosslinking agent (1–3 mol% monomer), and reinforcing (montmorillonite-MMT, 1–3 wt.% composition) swelling viscoelastic properties crosslinked hydrogels prepared from methacrylic acid (MAA) N,N′-methylenebisacrylamide (BIS) in presence K2S2O8 aqueous solution. measurements, carried out as-prepared hydrogels, showed that concentration had largest impact,...
"Green chemistry" is a simple and easily reproductible method that provides nanoparticles characterized by better stability good dispersion in an aqueous solution. Nanoparticles can be synthesized algae, bacteria, fungi, plant extracts. Ganoderma lucidum commonly used medicinal mushroom with distinctive biological properties, such as antibacterial, antifungal, antioxidant, anti-inflammatory, anticancer, etc. In this study, mycelial extracts of were to reduce AgNO3 form silver (AgNPs). The...
The tin-doped TiO2 powders obtained by sol-gel and microwave-assisted methods were investigated. synthesis took place in a basic medium (pH 10, ammonium hydroxide, 25%) starting from tetrabutyl orthotitanate its parental alcohol. In the case of dopant, Tin(II) 2-ethylhexanoate as SnO2 precursor was used amount 1, 2, or 4 mol % SnO2. Based on thermal analysis data, thermally treated air, at 500 °C. comparative investigation structure morphology nanopowders annealed °C performed scanning...
The present investigation reports on a simple technique for the preparation of single‐phase BiFeO 3 powders using polymerized complex method, starting from iron and bismuth nitrates. A mixed aqueous solution with citric acid, ethylene glycol, Bi, Fe ions was polymerized. formation mechanism, homogeneity, structure obtained have been investigated by thermogravimetry, X‐ray diffraction (XRD), Raman spectroscopy, scanning transmission electron microscopy measurements. XRD results demonstrated...
Magnesium oxide (MgO) was synthesized by three different methods: the sol–gel (SG), microwave-assisted (MW), and hydrothermal (HT) methods for comparing influence of preparation conditions on properties products. The powders were annealed at 450 °C. samples characterized X-ray diffraction, scanning electron microscopy (SEM), transmission (TEM/HRTEM), selected area diffraction (SAED), energy-dispersive spectroscopy (EDX), BET specific surface porosity, photoluminescence, UV–Vis spectroscopy....
This study explored a new green approach of the wet ferritization method to obtain magnetic cobalt ferrite (CoFe2O4) by using eucalyptus leaves aqueous extract as reducing/chelating/capping agent. The spinel single cubic phases prepared samples were proved powder X-ray diffraction (XRD), Fourier-Transform Infrared (FTIR) and Raman spectroscopy. average crystallite size is in range between 3 20 nm. presence functional groups coating obtained material confirmed from FTIR thermal analysis....
Present study refers to the synthesis of new advanced materials based on poly(methacrylic acid) (PMAA) with previously reported own modified clays by edge covalent bonding. This will create premises obtain nanocomposite hydrogels combined hydrophilic-hydrophobic behavior absolutely necessary for co-delivery polar/nonpolar substances. For synthesis, N,N’-methylenebisacrylamide was used as cross-linker and ammonium persulphate initiator. As a consequence inclusion clay into polymer matrix...