A5049414374- Surfactants and Colloidal Systems
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Photochemistry and Electron Transfer Studies
- Advanced Nanomaterials in Catalysis
- Protein Interaction Studies and Fluorescence Analysis
- Luminescence and Fluorescent Materials
- Polymer Surface Interaction Studies
- Advanced Polymer Synthesis and Characterization
- Analytical Chemistry and Chromatography
- Electrostatics and Colloid Interactions
- Catalytic Processes in Materials Science
- Analytical Chemistry and Sensors
- Corrosion Behavior and Inhibition
- Nanomaterials for catalytic reactions
- Molecular Sensors and Ion Detection
- Environmental Chemistry and Analysis
- Hydrogen embrittlement and corrosion behaviors in metals
- Concrete Corrosion and Durability
- Electrochemical Analysis and Applications
- Material Properties and Applications
- Photochromic and Fluorescence Chemistry
- Lipid Membrane Structure and Behavior
- Catalysis and Oxidation Reactions
- Mesoporous Materials and Catalysis
Romanian Academy
2016-2025
Gheorghe Asachi Technical University of Iași
2018
Institute of Physical Chemistry
2007
Research Institute of Synthetic Fiber with the Pilot Plant
1995
Academy of Romanian Scientists
1994
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...
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....
Ti-aluminosilicate gels were used as supports for the immobilization of Fe, Co, and Ni oxides (5%) by impregnation synthesis efficient photocatalysts degradation β-lactam antibiotics from water. Titanium oxide (1 2%) was incorporated into zeolite network modifying gel during zeolitization process. The formation Y structure its microporous evidenced X-ray diffraction N2 physisorption. structure, composition, reduction, optical properties studied diffraction, H2-TPR, XPS, Raman,...
In this investigation, electrochemical deposition procedures were reported to synthesize a novel composite polymer, 3-methylpyrrole-dodecyl sulfate sodium/3,4-ethylenedioxythiophene (3MPY-SDS/EDOT) coatings, on OL 37 samples for anticorrosion protection. The anionic surfactant dodecyl sodium used in can have relevant action the protective capacity. These coatings considered by cyclic voltammetry (CV), Fourier transform infrared (FT-IR) spectroscopy, and scanning electron microscopy (SEM)...
Ag nanoparticles (AgNPs) were biosynthesized using sage (Salvia officinalis L.) extract. The obtained supported on SBA-15 mesoporous silica (S), before and after immobilization of 10% TiO2 (Degussa-P25, STp; commercial rutile, STr; synthesized from Ti butoxide, STb). formation AgNPs was confirmed by X-ray diffraction. plasmon resonance effect, evidenced UV-Vis spectra, preserved only for the sample STb. dispersion properties supports TEM microscopy, energy-dispersive X-rays, dynamic light...
The effect of homogeneous nonionic surfactants (CnE8 with n = 10, 12, and 14) on the solution behavior poly(acrylic acid) (PAA) was investigated by surface tension viscometry. first method allowed determination critical micelle concentration (cmc), aggregation (cac or T1), saturation polymer onset free micelles into (T2) an intermediate (T2') that defined as stoichiometric for binding. T1 points were lower than cmc's, change vs number carbon atoms in alkyl chain obeys same rule cmc does....
Zeolite Y samples with microporous and hierarchical structures containing Ti-Ni Ti-Co oxides were obtained as active photocatalysts. Different Ti amounts (5, 10% TiO2) supported, followed by the loading of Ni or Co (5%). X-ray diffraction evidenced presence TiO2 an anatase. N2 adsorption-desorption results showed type IV isotherms for zeolite samples, a combination I samples. UV-Vis diffuse reflectance spectra shift in absorption band to visible increasing especially after addition. A...
Using the microwave-assisted sol-gel method, Zn- and Cu-doped TiO2 nanoparticles with an anatase crystalline structure were prepared. Titanium (IV) butoxide was used as a precursor, parental alcohol solvent ammonia water catalyst. Based on TG/DTA results, powders thermally treated at 500 °C. XRD XRF revealed presence of single-phase dopants in nanoparticles. The surface oxidation states elements studied using XPS, which confirmed Ti, O, Zn, Cu. photocatalytic activity doped nanopowders...
The present work reports the synthesis of efficient Ti-Au/zeolite Y photocatalysts by different processing aluminosilicate gel and studies effect titania content on structural, morphological, textural, optical properties materials. best characteristics zeolite were obtained aging in static conditions mixing precursors under magnetic stirring. Titania (5, 10, 20%) gold (1%) species incorporated support post-synthesis method. samples characterized X-ray diffraction, N2-physisorption, SEM,...
New photocatalysts were obtained by immobilization of titanium and gold species on zeolite Y, hierarchical MCM-48 KIT-6 supports with microporous, mesoporous cubic structure. The samples characterized X-ray diffraction (XRD), N2-physisorption, scanning transmission electron microscopy (SEM/TEM), diffuse reflectance UV–Vis spectroscopy (DRUV-Vis), photoelectron (XPS), Raman photoluminescence spectroscopy. photocatalytic properties evaluated in degradation amoxicillin (AMX) from water, under...