A5065615760- Graphene research and applications
- Graphene and Nanomaterials Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Nanoparticles: synthesis and applications
- Electrohydrodynamics and Fluid Dynamics
- Diamond and Carbon-based Materials Research
- Carbon and Quantum Dots Applications
- Ion-surface interactions and analysis
- Advancements in Battery Materials
- Electrocatalysts for Energy Conversion
- Supercapacitor Materials and Fabrication
- Microplastics and Plastic Pollution
- Advanced Memory and Neural Computing
Budapest University of Technology and Economics
2020-2023
Abstract Graphene oxide (GO) is not only an intermediate in top-down graphene preparation, but it also acknowledged for its convenient application when the hydrophobicity of a drawback. Its preparation through wet exfoliation graphite inevitably leads to product lacking several outstanding features graphene. The destroyed structure can be at least partially reconstructed by thermal and/or chemical reduction. Thermally reduced (TRGO) was obtained mild heat treatment (300 °C) argon, while...
Solvent-free radiofrequency (RF) nitrogen plasma treatment was applied to incorporate atoms in relatively high concentration. Graphene oxide (GO) and two reduced GOs of different O-content were used as target substrates reveal the influence functional groups decorating graphene lattice on quantity quality incorporation. Despite oxygen content samples no N–O bonds develop but three kinds N–C very similar concentration are formed. Reduction GO removed O-groups did not heal vacancies where N...
The extensive use of engineered nanomaterials, such as graphene oxide (GO), is stimulating research about its potential environmental impacts on the aquatic ecosystem. This study aimed to comprehensively assess acute toxicity a well-characterized GO suspension Daphnia magna. Conventional ecotoxicological endpoints (lethality, immobilization) and more sensitive, sublethal (heartbeat rate, feeding activity, reactive oxygen species (ROS)) production were used. possible normalization heartbeat...
The adsorption of the fluorescent dye, Oxazine 1 (OX) was studied on graphene oxide (GO), in range low (⩽10−7 M) OX concentrations, exploiting high sensitivity fluorescence spectroscopy. Dry GO characterized using XRD, TEM, XPS, Raman and IR spectroscopy, while its chemistry aqueous suspension examined with potentiometric titration. Adsorption isotherms were measured at pH 6.4 10.2 temperatures 20 35 °C. All well described by Langmuir equation. saturation capacities nm higher than respective...
Today, graphene oxide (GO) has gained well-deserved recognition, with its applications continuing to increase. Much of the processing GO-based devices occurs in a dispersed form, which explains commercialization GO suspensions. Aging these suspensions can, however, affect shelf life and thus their application potential. preparations is often acknowledged, but no longer-term systematic study been reported on alteration This paper investigates high-concentration (10 mg/mL) aqueous over 2-year...
Wet oxidative exfoliation of graphite is one the most frequently applied techniques to obtain aqueous dispersions hydrophilic graphene derivatives as required, e.g., in 3D printing, wet spinning or film casting. Due harsh conditions process, resulting suspension a mixture particles with wide distribution range both physical dimensions and chemical properties. An oxide was obtained by an improved Hummers method separated into five fractions controlled centrifugation. The were characterized...
Solvent-free radiofrequency (RF) nitrogen plasma treatment was applied to incorporate atoms in relatively high concentration. Graphene oxide (GO) and two reduced GOs of different O-content were used as target substrates reveal the influence functional groups decorating graphene lattice on quantity quality incorporation. Despite oxygen content samples no N-O bonds develop but three kinds N-C very similar concentration are formed. Reduction GO removed O-groups did not heal vacancies where N...
The solvent-free nitrogen plasma treatment is able to incorporate atoms in relatively high concentration. Graphene oxide (GO) and two reduced GOs of different O-content were used as target substrates reveal the influence functional groups decorating graphene lattice on quantity quality incorporation. Despite oxygen content samples no N―O bonds develop but three kinds N―C very similar concentration are formed. Reduction GO removed O-groups did not heal vacancies where N doping may occur....