A5038659240- Magnetism in coordination complexes
- Advanced Photocatalysis Techniques
- Metal-Catalyzed Oxygenation Mechanisms
- Lanthanide and Transition Metal Complexes
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal complexes synthesis and properties
- Catalytic Processes in Materials Science
- Iron oxide chemistry and applications
- Nanomaterials for catalytic reactions
- Electron Spin Resonance Studies
- TiO2 Photocatalysis and Solar Cells
- Nanoparticle-Based Drug Delivery
- Surface Chemistry and Catalysis
- Photosynthetic Processes and Mechanisms
- Electrochemical sensors and biosensors
- Graphene and Nanomaterials Applications
- Graphene research and applications
- Carbon and Quantum Dots Applications
- Porphyrin and Phthalocyanine Chemistry
- Copper-based nanomaterials and applications
- Environmental remediation with nanomaterials
- Electrochemical Analysis and Applications
- Advanced Nanomaterials in Catalysis
- Nanocluster Synthesis and Applications
Regional Centre of Advanced Technologies and Materials
2016-2025
Palacký University Olomouc
2016-2025
VSB - Technical University of Ostrava
2023-2025
Moravská Vysoká Skola Olomouc
2015-2018
CGB Laboratory
2016
University of Oslo
2006-2013
Karlsruhe Institute of Technology
2008-2011
École Polytechnique Fédérale de Lausanne
2007-2010
Technical University of Munich
2008-2010
Max Planck Institute for Solid State Research
2008-2010
We present a systematic study of metal−organic honeycomb lattices assembled from simple ditopic molecular bricks and Co atoms on Ag(111). This approach enables us to fabricate size- shape-controlled open nanomeshes with pore dimensions up 5.7 nm. The networks are thermally robust while extending over μm2 large areas as single domains. They shape resistant in the presence further deposited materials represent templates organize guest species realize rotary systems.
Single-atom (SA) catalysis is a novel frontline in the field due to often drastically enhanced specific activity and selectivity of many catalytic reactions. Here, an atomic-scale defect engineering approach form control traps for platinum SA sites as co-catalyst photocatalytic H2 generation described. Thin sputtered TiO2 layers are used model photocatalyst, compared more frequently (001) anatase sheets. To stable platinum, reduced Ar/H2 under different conditions (leading but defined Ti3+...
Single-atom catalysts (SACs) aim at bridging the gap between homogeneous and heterogeneous catalysis. The challenge is development of materials with ligands enabling coordination metal atoms in different valence states, preventing leaching or nanoparticle formation. Graphene functionalized nitrile groups (cyanographene) herein employed for robust Cu(II) ions, which are partially reduced to Cu(I) due graphene-induced charge transfer. Inspired by nature's selection enzymes oxygen activation,...
Reduction of nitroaromatics to the corresponding amines is a key process in fine and bulk chemicals industry produce polymers, pharmaceuticals, agrochemicals dyes. However, their effective selective reduction requires high temperatures pressurized hydrogen involves noble metal-based catalysts. Here we report on an earth-abundant, plasmonic nano-photocatalyst, with excellent reaction rate towards hydrogenation nitroaromatics. With solar light as only energy input, chalcopyrite catalyst...
Abstract Covalent organic frameworks (COFs) are porous structures emerging as promising electrode materials due to their high structural diversity, controlled and wide pore network, amenability chemical modifications. COFs solely composed of periodically arranged molecules, resulting in lightweight materials. Their inherent properties, such extended surface area diverse framework topologies, along with proclivity modification, have positioned sophisticated the realm electrochemical energy...
Photoelectrochemical water splitting on n-type semiconductors is highly dependent catalysis of the rate-determining reaction O2 evolution. Conventionally, in electrochemistry and photoelectrochemistry evolution catalyzed by metal oxide catalysts like IrO2 RuO2, whereas noble metals such as Pt are considered unsuitable for this purpose. However, our study finds that Pt, its single-atom form, exhibits exceptional cocatalytic properties photoelectrochemical oxidation a TiO2 photoanode, contrast...
Independent symmetries characterize the evolving network and metal surface on which forms in surface-assisted assembly of ligands centers to 2D honeycomb networks comprising threefold coordination motifs (see picture, Co purple, N green). This type coordination, is rarely encountered 3D metal–organic frameworks, promoted by strict confinement a environment.
Self-assembly techniques allow for the fabrication of highly organized architectures with atomic-level precision. Here, we report on molecular-level scanning tunneling microscopy observations demonstrating supramolecular engineering complex, regular, and long-range ordered periodic networks a surface atomic lattice using simple linear molecular bricks. The length variation employed de novo synthesized dicarbonitrile polyphenyl molecules translates to distinct changes bonding motifs that lead...
The experimental and theoretical study of the electron spin dynamics in anionic form a single-ion molecule magnet (SIMM), bis-phthalocyaninato terbium (III) [Pc2Tb]−[TBA]+, has been addressed by means solid state 1H NMR spectroscopy. magnetic properties caged Tb3+ metal center were investigated series diamagnetically diluted preparations, where excess tetrabutylamonium bromide ([TBA]Br)n salt was used as diamagnetic matrix complement. We found that high temperature activated characterizes...
Reduced titanium dioxide has recently attracted large attention, particularly for its unique co-catalyst-free H$_2$ heterogeneous photocatalytic application. The enhanced activity of the reduced TiO$_2$ was previously ascribed to introduction point crystal defects (mainly Ti$_3^+$ centers), which result in formation intrinsic co-catalytic centers and visible light absorption. In this work, we systematically investigate effect different TiO$_{2-x}$ lattice on evolution. To introduce types...
Arsenites and arsenates are carcinogenic to humans typically removed from contaminated water using various sorbents. However, these treatment methods result in the secondary release of weakly bound As species require large amounts Here, we introduce a groundbreaking method involving use oxidic-shell-free nanoscale zero-valent iron (OSF-nZVI) treat arsenite/arsenate-polluted underground water. Under anoxic conditions, OSF-nZVI is capable reduce As(III)/As(V) As(0) (up 65% total arsenic...
Trapping sites in single atom (SA) catalysts are critical to the stabilization and reactivity of isolated atoms. Herein, we show that anchoring Pt SAs on TiO2 nanosheets is strongly aided by lattice incorporated fluorine species. Tailoring speciation a key factor for uniform stable dispersion high efficiency SA co-catalyzed photocatalytic H2 production. Fluorine-stabilized uniformly dispersed (001) surface can provide remarkable activity (a production rate 45.3 mmol h–1 mg–1 65 mW/cm2 365 nm...
Cationic quaternized carbon dots (QCDs) and anionic graphene oxide sheets (GO) are combined via non-covalent interactions following a self-assembly pathway to form highly biocompatible fluorescent hybrid materials. These hybrids act as selective probes with controlled labelling of the cell nucleus or cytoplasm depending on QCD loading.
Understanding the links between nucleophilic/reductive strength of environment, formation radicals and point defect characteristics is crucial for achieving control over functionalization fluorographene.
The use of microwave-assisted synthesis (in water) α-Fe2O3 nanomaterials followed by their transformation onto iron oxide Fe3O4-γ-Fe2O3 hollow nanoparticles encoding well-defined sizes and shapes [nanorings (NRs) nanotubes (NTs)] is henceforth described. impact experimental variables such as concentration reactants, volume solvent employed, reaction times/temperatures during the shape-controlled revealed that key factor gated generation morphologically diverse was associated to initial...
Highly fluorescent carbon nanoparticles called dots (CDs) have been the focus of intense research due to their simple chemical synthesis, nontoxic nature, and broad application potential including optoelectronics, photocatalysis, biomedicine, energy-related technologies. Although a detailed elucidation mechanism photoluminescence (PL) remains an unmet challenge, CDs exhibit robust, reproducible, environment-sensitive PL signals, enabling us monitor selected phenomena phase transitions or...
Ultrathin two-dimensional (2D) semiconductor nanosheets decorated with single atomic species (SAs) have recently attracted increasing attention due to their abundant surface-exposed reactive sites and maximum SAs binding capabilities thus lowering the catalyst cost, without sacrificing high performance for photocatalytic hydrogen (H2) production from water. Here, we present a strategy prepare titanium dioxide-bronze (TiO2-BNS) H2-reduced TiO2 (TiO2-HRNS) synthesized, characterized, applied...
In this study, we explored the photocatalytic efficacy of Ti3+-doped TiO2-based photocatalysts for CO2 reduction. The Ti3+ self-doped were synthesized using a straightforward chemical reduction with sodium borohydride (NaBH4). Our investigation aimed to elucidate intricate interplay between synthesis process and quantity NaBH4 reductant on physical-chemical attributes defective photocatalysts. We three different commercially available TiO2 materials labeled P25, (S)TiO2, KRONOClean7050,...
Two 2,6-bispyrazolylpyridine ligands (bpp) were functionalized with pyrene moieties through linkers of different lengths. In the ligand 2,6-di(1H-pyrazol-1-yl)-4-(pyren-1-yl)pyridine (L1) group is directly connected to bpp moiety via a C–C single bond, while in 4-(2,6-di(1H-pyrazol-1-yl)pyridin-4-yl)benzyl-4-(pyren-1-yl)butanoate (L2) it separated by benzyl ester involving flexible butanoic chain. Subsequent complexation Fe(II) salts revealed dramatic influence nature substitution on...
Abstract This Feature Article reports on the controlled formation and structure‐functionality aspects of vacuum‐deposited self‐assembled organic metal‐organic networks at metal surfaces using ditopic linear nonlinear molecular bricks, namely di‐carbonitrile polyphenyls. Surface confined supramolecular organization aromatic molecules leads to a fascinating variety open networks. Moreover, cobalt‐directed assembly same linkers reveals highly regular, honeycomb with tunable pore sizes...