A5036313681- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Gas Sensing Nanomaterials and Sensors
- Catalytic Processes in Materials Science
- Advanced Chemical Sensor Technologies
- Aerogels and thermal insulation
- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
- Mesoporous Materials and Catalysis
- Adsorption and biosorption for pollutant removal
- Dental materials and restorations
- Pigment Synthesis and Properties
- Bone Tissue Engineering Materials
- Transition Metal Oxide Nanomaterials
- Graphene and Nanomaterials Applications
- Pharmacological Effects and Assays
- Water Quality Monitoring and Analysis
- Innovative concrete reinforcement materials
- Magnesium Oxide Properties and Applications
- Graphene research and applications
- Polymer Science and PVC
- Methane Hydrates and Related Phenomena
Babeș-Bolyai University
2014-2024
Université du Québec à Trois-Rivières
2024
Applied Natural Sciences
2020-2023
In this study, bismuth- and iron-embedded carbon xerogels (XG) were obtained using a modified resorcinol formaldehyde sol–gel synthesis method followed by additional enrichment with iron content. Pyrolysis treatment was performed at elevated temperatures under Ar or N2 atmosphere to obtain nanocomposites different reduction yields (XGAr XGN). The interest focused on investigating the extent which changes in pyrolysis of these impact structure, morphology, electrical properties material...
In order to find solutions current worldwide environmental problems, it is crucial develop sustainable nanomaterials, ideally with multifunctional properties. Considering this, novel TiO2-SnO2@NMs (noble metals: Au and Ag) composites, for use as were successfully prepared via a two-step synthesis process consisting of laser pyrolysis followed by the chemical impregnation collected materials noble metals. The addition SnO2 favors transformation TiO2 from mixture majority Anatase phase one...
Abstract A new electrode based on carbon paste (CP) modified with natural clay was used for heavy metals detection. The investigation of the raw material (X-ray diffraction, infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray thermal analysis and particle size distribution) revealed different morpho-structural properties material. electrochemical behaviour its ability to detect (Zn 2+ , Cd Cu ) studied by techniques like cyclic voltammetry (CV), impedance...
Abstract High mesoporous carbon aerogels (CA) were prepared by a sol‐gel method, followed supercritical drying with liquid CO 2 and pyrolysis under inert atmosphere. The morphological structural characteristics (surface area, pore size distribution volume) of CA examined using N adsorption/desorption isotherms, TEM, SEM AFM measurements. CA, dispersed in chitosan (Chi) solution, was immobilized on the surface glassy (GC) electrode aiming to prepare an amperometric transducer able improve...
In the present work, ZrO2-based composites were prepared by adding different amounts of antibacterial magnesium oxide and bioactive biocompatible hydroxyapatite (HAP) to inert zirconia. The synthesized conventional ceramic processing route morpho-structurally analyzed X-ray powder diffraction (XRPD) scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS). Two metallic dental alloys (i.e., Ni–Cr Co–Cr) coated with a chitosan (Chit) membrane containing exposed aerated artificial...
Multifunctional materials based on carbon xerogel (CX) with embedded bismuth (Bi) and iron (Fe) nanoparticles are tested for ultrasensitive amperometric detection of lead cation (Pb2+) hydrogen peroxide (H2O2). The prepared CXBiFe-T nanocomposites were annealed at different pyrolysis temperatures (T, between 600 1050 °C) characterized by X-ray diffraction (XRD), Raman spectroscopy, N2 adsorption, dynamic light scattering (DLS), electron microscopies (SEM/EDX TEM). Electrochemical impedance...
The TiO2 deposition on high surface possessing supports can increase the photocatalytic efficiency of a semiconductor, as already shown in literature because, adsorption capacity support help to enrich organic substrate around catalyst promoting charge-transfer process between pollutants and photocatalysts. Consequently, this study, we investigated synthesis composite materials based different types carbon. Titanium tetrachloride (TiCl4) was used precursor, while graphite, activated carbon...
Abstract ZnO nanoparticles (ZnO‐NP) were prepared by a facile precipitation technique using di‐isopropyl amine as precipitating agent. The morpho‐structure and porosity of the as‐prepared nano‐powder investigated FT‐IR analysis, X‐ray diffraction (XRD), scanning electron microscopy (SEM), BET analysis. By drop‐casting, composite film was deposited to obtain ZnO‐NP‐Nafion/GCE modified electrode. electrode cyclic voltammetry, electrochemical impedance spectroscopy, square wave anodic stripping...
AbstractCarbon aerogel (CA) and xerogel (CX) are proposed for pesticide adsorption as new carbon adsorbent materials. These materials prepared by polycondensation of resorcinol formaldehyde in Na2CO3 catalysis, followed a drying step, CO2 supercritical or normal conditions to obtain organic xerogel, pyrolytic step CA CX. Adsorption experiments were carried out batch under magnetic stirring. Adsorbent quantity grain size, pH, temperature, alpha-cypermethrin concentration influence on the...
Multifunctional Bi- and Fe-modified carbon xerogel composites (CXBiFe), with different Fe concentrations, were obtained by a resorcinol–formaldehyde sol–gel method, followed drying in ambient conditions pyrolysis treatment. The morphological structural characterization performed X-ray diffraction (XRD), Raman spectroscopy, N2 adsorption/desorption porosimetry, scanning electron microscopy (SEM) scanning/transmission (STEM) analyses, indicates the formation of carbon-based nanocomposites...
In order to obtain a multifunctional nanocomposite material-for electrochemical sensors and photocatalytic applications, structures based on Bi, Fe TiO₂ were grown inside carbon xerogel supports (BiFeCX BiFeCX-TiO₂). First, wet polymer containing Bi salts was obtained by following modified resorcinol-formaldehyde sol-gel route, followed drying in ambient conditions, pyrolysis under inert atmosphere. Then, through TiCl₄ hydrolysis, nanoparticles deposited the BiFeCX leading BiFeCX-TiO₂. The...
Carbon xerogel nanocomposites with integrated Bi and Fe particles (C–Bi–Fe) represent an interesting model of carbon nanostructures decorated multifunctional nanoparticles (NPs) applicability for electrochemical sensors catalysts. The present study addresses the fundamental aspects catalyzed growth nano-graphites in C–Bi–Fe systems, relevant charge transport thermo-chemical processes. thermal evolution a is investigated using different pyrolysis treatments. At lower temperatures (~750°C),...