A5016926770- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Graphene research and applications
- Supercapacitor Materials and Fabrication
- Fusion materials and technologies
- Gas Sensing Nanomaterials and Sensors
- Catalysis and Oxidation Reactions
- Nuclear Materials and Properties
- Geological and Geochemical Analysis
- ZnO doping and properties
- Copper-based nanomaterials and applications
- Electrochemical sensors and biosensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Electrochemical Analysis and Applications
- Advanced Nanomaterials in Catalysis
- Metal Extraction and Bioleaching
- Catalysts for Methane Reforming
- Electronic and Structural Properties of Oxides
- Mineralogy and Gemology Studies
- Advanced biosensing and bioanalysis techniques
- Aluminum Alloy Microstructure Properties
- Advancements in Battery Materials
- Mesoporous Materials and Catalysis
- Electrocatalysts for Energy Conversion
Jožef Stefan Institute
2016-2025
Jožef Stefan International Postgraduate School
2016-2025
Max-Planck-Institut für Nachhaltige Materialien
2018-2024
Ben-Gurion University of the Negev
2020
Max Planck Society
2018-2019
Austrian Centre for Electron Microscopy and Nanoanalysis
2016-2017
The results of investigating the morphological, optical and electronic properties three synthesized TiO2 polymorphs (anatase (A A2), brookite (B B2) rutile (R)) show that origin their different catalytic efficiency in heterogeneous photocatalytic process lies depths charge carrier traps. presence shallow electron traps extends number "lifetime" generated holes, so is a good choice as photocatalyst such systems where these two variables are reaction limiting factors. Low generation high...
In this review, the weightiest decadal developments of surface-enhanced Raman scattering (SERS) and nanoplasmonic materials in sensing applications are discussed. Today, there several well-established research directions where plasmonic detection is employed extensively, namely, food water quality monitoring, viruses, pathogenic bacteria hazardous toxin investigations for theranostic applications, explosive substance military civil protection purposes. A combination vibrational spectroscopy...
Highly ordered, Ni(OH)2Ni-nanowire-based receptor elements were electrochemically fabricated and tested for formaldehyde (HCHO) detection by monitoring their oxidation ability in alkaline media. In order to normalize the electrochemical output currents, Ni nanowires' active surface area was assessed using an oxalate-based method after template released. The transformation of Ni-nanowire surfaces a Ni(OH)2/NiOOH redox couple performed 0.5-mol L−1 KOH cyclic voltammetry at 200 mV s−1....
A graphical illustration of TNR + rGO composites and a possible mechanism for improved charge migration.
The methane dry reforming reaction (DRM) converts and CO2 into syngas, a mixture of H2 CO. When illuminated by 790 mW cm−2 white light, the 2Ni/CeO2−x catalyst CH4 beyond thermodynamic equilibrium, while energy efficiency reaches 33%. DRM is sustained in purely photocatalytic mode without external heating, yielding rates 0.21 0.75 mmol (gcat • min)−1, respectively. Theoretical analysis Ni/CeO2−x optical properties agrees with in-situ UV-Vis DRS results reveals partly reduced Ce3+ sites...
Taking advantage of the high-energy-density microwave plasma environment as a unique 3D space for self-assembly free-standing nanostructures, novel multifunctional platform continuous production graphene and derivatives at gram scale was developed. The is supported by prototype machine capable performing wide variety industrially applicable processes within single assembly environment. Free-standing nitrogen doped graphene, i.e., N-graphene nanosheets, hybrid nanocomposites are assembled in...
In this paper we examined the photocatalytic efficiency of a laser-synthesized colloidal solution ZnO nanoparticles synthesized by laser ablation in water. The average size obtained is about 47 nm. As revealed electron microscopy, other nanostructures were also present solution, especially nanosheets. A degradation UV-irradiated Methylene Blue and Rhodamine B solutions different concentration presence catalyst mass concentrations was studied order to examine their influence on...
Transition-metal sulfides combined with conductive carbon nanostructures are considered promising electrode materials for redox-based supercapacitors due to their high specific capacity. However, the low rate capability of these electrodes, still "battery-type" presents an obstacle general use. In this work, we demonstrate a successful and fast fabrication process metal sulfide–carbon ideal charge-storage electrodes ultra-high capacity outstanding capability. The novel hybrid binder-free...
Dry reforming of methane (DRM) is a promising way to convert and carbon dioxide into H2 CO (syngas). CeO2 nanorods, nanocubes, nanospheres were decorated with 1-4 wt % Ni. The materials structurally characterized using TEM in situ XANES/EXAFS. CO2 activation was analyzed by DFT temperature-programmed techniques combined MS-DRIFTS. Synthesized morphologies expose {111} {100} terminating facets, varying the strength interaction redox properties, which influence activation....
Different synthesis temperatures (450–550 °C) were applied to synthesize g-C3N4 with the highest visible-light triggered photocatalytic activity. The best performing photocatalyst was synthesized at 550 °C due created favourable structure that expressed lowest band gap and charge carrier recombination rate. To further improve activity of g-C3N4, different g-C3N4/TiO2 (gCN/TNP) composites varying weight concentrations TiO2 prepared. Charge separation enabled injection photogenerated electrons...
The main objective of the present study was to increase specific surface area (SBET) graphitic carbon nitride (g-C3N4) prepared from dicyandiamide by effectively modifying synthesis procedure using Simplex optimization method. A remarkable in SBET achieved only a few steps, with highest value 86 m2/g. Compared reference material, improved photocatalyst exhibited enhanced and unique structural, textural, optical, electronic properties, reflected ability degrade variety organic pollutants...
TiO2+Pt plasmonic solids with 1 wt% Pt and different TiO2 supports (anatase nanoparticles (TNP), polycrystalline nanorods (a-TNR) single-crystal anatase (TNR)) were synthesized using the wet impregnation technique tested as photo, thermal photothermal catalysts in gas-solid gas-liquid-solid reactions. Due to charges of support surfaces, particles sizes, crystallinities degrees interaction formed during synthesis. The heights Schottky barrier (SBH) 0.38 eV for a-TNR+Pt, 0.41 TNP+Pt, 0.50...
Plasmonic Au (1 wt%) catalysts deposited on hydrothermally synthesized TiO2 nanorods (TNR) were investigated in this study. Based the duration of mixing precursor/TNR suspension during wet impregnation synthesis and parameters end calcination, Au/TiO2 with different sizes nanoparticles (Au NPs) obtained. The prepared solids thoroughly characterized by several instrumental techniques to investigate property-activity relationships. Regardless size particles catalyst surface, an absorption peak...
A systematic analysis of the structure, ferroelectricity and photocatalytic activity (PCA) Sm V modified Bi<sub>4</sub>Ti<sub>3</sub>O<sub>12</sub>was performed. Highly reproducible gas–solid phase PCA NO<sub>x</sub>abatement improved were achieved.
In present work, we report on the enhanced electrocatalytic activity of formaldehyde oxidation in alkaline media for modified Ni nanowires (NWs)-based electrodes. Electrochemically deposited NWs composed metallic and surface NiO were KOH via cyclic voltammetry using different scan rates (10, 200 400 mV s−1) order to transform an inactive surface-catalytic-active structurally disordered β-NiOOH/β-Ni(OH)2. Various characterisations (XRD FT-IR) calculations based electric charge performed...
In this paper, we explore the development of copper oxide layers and their evolution into nanowires on thermally oxidized underlying chemical processes governing growth unidirectional, one-dimensional (CuO), especially focusing role layers. Extensive experimental data sets grown in an ambient atmosphere at different oxidation temperatures times were collected, analysed, correlated with theoretical modeling processes. Detailed microstructural analysis revealed that upon annealing air, Cu2O...
Calcination in hydrogen or argon improved nickel dispersion and increased the abundance of oxygen vacancies ceria nanorods. Visible light both accelerated methane reforming rate H 2 selectivity by retarding RWGS reaction.