A5049516049- Membrane-based Ion Separation Techniques
- Membrane Separation Technologies
- Surface Modification and Superhydrophobicity
- Silicone and Siloxane Chemistry
- Corrosion Behavior and Inhibition
- Fuel Cells and Related Materials
- Extraction and Separation Processes
- Gas Sensing Nanomaterials and Sensors
- Adsorption and biosorption for pollutant removal
- Electrochemical sensors and biosensors
- TiO2 Photocatalysis and Solar Cells
- Advanced battery technologies research
- Aerogels and thermal insulation
- Conducting polymers and applications
- Nanomaterials for catalytic reactions
- Advanced Photocatalysis Techniques
- Electrochemical Analysis and Applications
- Force Microscopy Techniques and Applications
- Industrial Gas Emission Control
- Adhesion, Friction, and Surface Interactions
- Polymer Nanocomposites and Properties
- Advanced oxidation water treatment
- Electrocatalysts for Energy Conversion
- Advanced Battery Materials and Technologies
- Metal and Thin Film Mechanics
Universitatea Națională de Știință și Tehnologie Politehnica București
2015-2025
Hybrid nanomaterials based on zinc oxide were synthesized via the sol-gel method, using different silane coupling agents: (3-glycidyloxypropyl)trimethoxysilane (GPTMS), phenyltriethoxysilane (PhTES), octyltriethoxysilane (OTES), and octadecyltriethoxysilane (ODTES). Morphological properties precursor type effect particle size investigated dynamic light scattering (DLS), environmental scanning electron microscopy (ESEM), transmission (TEM), thermogravimetric analysis (TGA), X-ray diffraction...
In this research work, silica nanoparticles and silica-gentamicin nanostructured solution were synthesized by using the microwave-assisted synthesis, in basic medium, two silane precursors (tetraethylorthosilicate octyltriethoxysilane) antibiotic (gentamicin sulfate). The prepared materials characterized through Fourier transform infrared (FTIR) spectroscopy, TGA analysis, transmission electron microscopy (TEM), atomic force (AFM) to investigate morphology structure. Antimicrobial studies of...
The present paper synthesized, characterized, and evaluated the performance of novel biopolymeric membrane enriched with cellulose acetate chitosan (CHI)-silver (Ag) ions in order to remove iron ion from synthetic wastewater using a new electrodialysis system. prepared membranes were characterized by Fourier Transforms Infrared Spectroscopy-Attenuated Total Reflection (FTIR-ATR), Thermal Gravimetric Analysis (TGA) Differential (DSC), contact angle measurements, microscopy studies,...
The goal of the present paper was to synthesize, characterize, and evaluate performance modified composite based on magnetite (Fe3O4) polyvinyl alcohol (PVA). obtained used degrade Methyl Orange dye from synthetic wastewater by a laboratory photocatalytic reactor. Various parameters photodegradation process were tested: dosage, amount hydrogen peroxide (H2O2), pH. characterized Fourier Transform Infrared (FTIR) Spectroscopy, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM)....
This study is aimed at developing an innovative approach for Indigo Carmine dye removal from synthetic solutions by electrodialysis, carried out using ion exchange membranes. The batch electrodialysis system was operated various current intensities: 0.05, 0.1 and 0.15 A. pH conductivity of were measured before after process. colour efficiency (CR %) determined spectrographic analysis the energy consumption (EC) calculated. obtained results show that treated solution increases due to increase...
The main goal of the present paper was to synthesize polyvinyl alcohol-SiO2 nanoparticles polymeric membrane by wet-phase inversion method. efficiency prepared membranes (without and with SiO2) investigated using a versatile laboratory electrodialysis system filled simulated wastewaters that contain zinc ions. All experiments were performed at following conditions: applied voltage electrodes 5, 10 15 V, concentration ions solution 2 g L−1, time for each test 1 h room temperature....
Zn-ZnO(Nw)-rGO hybrid electrodes for supercapacitor applications were successfully prepared in situ by a one-step microwave-assisted hydrothermal method deposition of reduced graphene oxide (rGO) on the structure ZnO nanowires grown Zn foil. During treatment, two processes occur reduction (GO) and rGO Zn-ZnO(Nw) support. The growth was achieved thermal oxidation below melting point foil controlled atmosphere. as-obtained assessed structural, optical, morphological properties X-ray...
This study investigated the properties of a novel polymeric membrane based on cellulose acetate, polyethylene glycol/poly(styrene)-b-poly(4-vinylpyridine), and embedded with TiO2 nanoparticles (CA/PEG/PS154-b-P4VP381/TiO2 membrane) obtained by wet-phase inversion method. The fabricated hydrothermal method were characterized XRD, SEM, EDX, UV-Vis analyses to determine purity, morphology, optical band gap energy. prepared membranes without CA/PEG/PS154-b-P4VP381 membranes) FTIR, EDXS, TGA...
The removal of ionic copper from electroplating wastewater was investigated using a five-compartment electrodialysis cell. experiments were carried out two different types ion-exchange membranes (Purolite A500, Purolite PPC100). effects initial ions concentration, solutions conductivity, pH on the duration electrodialysis, massic flow (the amount deposited cathode lead), and extraction percentage determinated. unit operates under constant applied voltage (7.5 V), with electrolyte...
The heterojunction based on n-TiO2 nanolayer/p-CuMnO2 thin film was achieved using an efficient two-step synthesis process for the fabrication of a UV photodetector. first step consisted obtaining TiO2 nanolayer, which grown titan foil by thermal oxidation (Ti-TiO2). second CuMnO2 deposition onto surface Ti-TiO2 Doctor Blade method. Techniques such as X-ray diffraction, UV-VIS analysis, SEM, and AFM morphologies were used investigation structural morphological characteristics as-synthesized...
Innovative polymer membranes with and without natural fruit extract (rosehip) are characterized in terms of their ability treating a solution containing Crystal violet by three‐compartment laboratory scale electro‐dialysis cell. Electro‐dialysis is performed at different time intervals using constant voltage 15 V. The dye removal percentage (%) energy consumption calculated. highest value obtained for 90 min (>96%) doped extract. Water uptake also determined the prepared membranes....
Magnesium–aluminum (Mg-Al) and magnesium–aluminum–nickel (Mg-Al-Ni) layered double hydroxides (LDHs) were synthesized by the co-precipitation method. The adsorption process of Mn2+ from synthetic wastewater was investigated. Formation on both Mg-Al Mg-Ni-Al LDHs observed X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) Energy Dispersive Spectrometry (EDX) analysis. XRD patterns for prepared presented sharp symmetrical peaks. SEM studies revealed that LDH Mg-Al-Ni exhibit a...
Transparent and antireflective coatings were prepared by deposition of modified silica materials onto polyvinyl chloride (PVC) substrates. These obtained the sol-gel route in acidic medium, at room temperature (25 °C), using different alkoxysilanes with various functional groups (methyl, vinyl, octyl or hexadecyl). Physicochemical microstructural properties resulted thin investigated through Fourier Transforms Infrared Spectroscopy (FTIR), UV-Vis spectroscopy, Thermal Gravimetric Analysis...
Three-dimensional graphene foam (3D-GrFoam) is a highly porous structure and sustained lattice formed by layers with sp2 sp3 hybridized carbon. In this work, chemical vapor deposition (CVD)—grown 3D-GrFoam was nitrogen-doped platinum functionalized using hydrothermal treatment different reducing agents (i.e., urea, hydrazine, ammonia, dihydrogen hexachloroplatinate (IV) hydrate, respectively). X-ray photoelectron spectroscopy (XPS) survey showed that the most electrochemically active sample...
ABSTRACT The micellization of three tailor‐made triblock copolymers, such as PB 100 –P2VP –PEO 104 , 185 108 154 and 37 115 241 having similar total molecular weights constant poly(2‐vinylpyridine) (P2VP) sequence lengths, was investigated a function pH sodium dodecyl sulfate (SDS) concentration. At 7 the formation intermicellar aggregates observed, especially for copolymers low poly(ethylene oxide) (PEO) content. A decrease from to 3 leads particle size increase due electrostatic repulsion...