Ilya Vladimirovich Korolkov

KU Leuven | ku leuven · Department of Chemistry

In this work, the surfaces of poly (ethylene terephthalate) track-etched membranes (PET TeMs) with pore sizes of 670–1310 nm were hydrophobized with 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoroheptyl acrylate (DFHA) by photoinitiated graft polymerization. Attenuated total reflection FTIR spectroscopy (ATR-FTIR), scanning electron microscopy (SEM) coupled t...

Cancer is one of the leading causes of global mortality, and its incidence is increasing annually. Neutron capture therapy (NCT) is a unique anticancer modality capable of selectively eliminating tumor cells within normal tissues. The development of accelerator-based, clinically mountable neutron sources has stimulated a worldwide search for new, m...

In this work, the surface of poly(ethylene terephthalate) track-etched membranes (PET TeMs) with pore sizes of 670-1310 nm was hydrophobized with 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoroheptyl acrylate (DFHA) by photoinitiated graft polymerization. Attenuated total reflection FTIR spec-troscopy (ATR-FTIR), scanning electron microscopy (SEM) coupled to...

Stimuli-responsive membranes play an important role in the fields of biomedicine, food and chemical industries, and environmental applications, including separation of water–oil emulsions. In this study, we present a method to fabricate pH-sensitive membranes using UV-initiated RAFT graft copolymerization of styrene (ST) and acrylic acid (AA) on po...

This paper describes the desalination process by membrane distillation (MD) using track-etched membranes (TeMs). Hydrophobic track-etched membranes based on poly(ethylene terephthalate) (PET TeMs) with pore diameters from 700 to 1300 nm were prepared by UV-initiated graft polymerization of lauryl methacrylate (LMA) inside the nanochannels. Modified...

A promising approach that uses the sol–gel method to manufacture new breathable active films with self-cleaning and antibacterial surfaces is based on the PET membranes obtained via ion track technology with a pore density of 10–7 cm−2 and a pore diameter of about 500 ± 15 nm, coated with a layer of TiO2 anatase, with a thickness of up to 80 nm. Th...

Rapid industrial growth in the petrochemical, pharmaceutical, metallurgical and food industries, as well as stormwater that accumulates pollution from the roadway and the territories of motor transport enterprises, gas stations, car washes and other municipal services have led to the formation of a large amount of oily wastewater. Oil-containing wa...

In this work, we have developed a method for the preparation of pH-responsive track-etched membranes (TeMs) based on poly(ethylene terephthalate) (PET) with pore diameters of 2.0 ± 0.1 μm of cylindrical shape by RAFT block copolymerization of styrene (ST) and 4-vinylpyridine (4-VP) to be used in the separation of water–oil emulsions. The influence...

In this article, results of PET track-etched membranes (PET TeMs) hydrophobized by photo-induced graft polymerization of stearyl methacrylate (SM) inside the pores were presented. The effects of monomer concentration, time of irradiation and the nature of the solvent on the degree of grafting and membrane morphology were investigated. The PET TeMs...

Dihalogen - halorhenates(IV) (Me4N)2{[ReX6](X2)} (X = Cl (1), Br (2)) were prepared and structurally characterized, featuring the first examples of rhenium/dihalogen supramolecular complexes. 1 and 2 reveal pseudo-3D structure; both compounds demonstrate high thermal stability, releasing Cl2 or Br2 only at elevated temperatures (over 90 and 150 °C,...

The outcomes of reactions between bismuth triiodide, 1,3,5-trimethylpyridinium iodide (1,3,5-MePyI), copper(I) or silver(I) iodides depend on the nature of solvents used in preparation. From acetone/acetonitrile mixture, there crystallizes only binuclear (1,3,5-MePy)3[Bi2I9] (1), while addition of ethanol allows isolation of homometallic (1,3,5-MeP...

The paper describes the synthesis of substrate for surface enhanced Raman spectroscopy (SERS) based on magnetic nickel nanotubes (Ni NTs). For the success application of Ni NTs in quantitative SERS analysis of organic molecules by the example of Rhodamine 6 G (R6G), electroless deposition of gold (I) on Ni NTs in alkali media was performed. The pur...

In this study of Gd x Fe 3-x O 4 compound core silane shell nanoparticles method is represented.Samples were analyzed with SEM, EDA and FTIR spectroscopy. Further attaching of carborane compounds is discussed. Products can be used in biomedical applications for MRI imaging and drug delivery for NCT, so can be considered as potential theranostic age...

Reactions of CuCl2·2H2O or Cu(NO3)2·6H2O with 3,5-diiodosalicylic acid (DISA) in presence of different amines result in structurally diverse products. Overall, we isolated 14 complexes of various nuclearity (1, 2, 3...

A method for the formation of magneto-optical one-dimensional (1-D) nanostructures by the electrodeposition method into the pores of track-etched membranes is presented in this letter. Two possible techniques are considered: the synthesis of magnetic nanotubes and their subsequent coating with silver, as well as the synthesis of vertical-standing a...

Ni nanotubes (NTs) were produced by the template method in the pores of ion-track membranes and then were successfully functionalized with gold nanoparticles (Ni@Au NTs) using electroless wet-chemical deposition with the aim to demonstrate their high catalytic activity. The fabricated NTs were characterized using a variety of techniques in order to...

The paper describes the separation of an oil–water emulsion by filtration using poly(ethylene terephthalate) track-etched membranes (PET TeMs) with regular pore geometry and narrow pore size distribution. PET TeMs were modified with trichloro(octyl)silane to increase their hydrophobic properties. Conditions for the modification of PET TeMs with tri...

In this article, a novel method of simultaneous carborane- and gadolinium-containing compounds as efficient agents for neutron capture therapy (NCT) delivery via magnetic nanocarriers is presented. The presence of both Gd and B increases the efficiency of NCT and using nanocarriers enhances selectivity. These factors make NCT not only efficient, bu...

Membrane distillation (MD) is a rapidly developing field of research and finds applications in desalination of water, purification from nonvolatile substances, and concentration of various solutions. This review presents data from recent studies on the MD process, MD configuration, the type of membranes and membrane hydrophobization. Particular imp...

Reactions of CuCl2•2H2O or Cu(NO3)2•6H2O with 3,5-diiodosalicylic acid (DISA) in presence of trialkylamines result in structurally diverse products. Depending on the ratio of reagents and Cu source, there were isolated either mononuclear complexes (R3NH)2[Cu(DISA)2] (R = Et (1), n-Pr (2) and n-Bu (3)) where fully deprotonated DISA forms 5-membered...

In supramolecular complex (1-EtPy)3{[Bi2I9](I2)0.75} (1), diiodine fragments are “captured” by iodobismuthate anions via the system of non-covalent I···I interactions (halogen bonding). The energies of latter were estimated by theoretical methods; optical features and Raman spectrum are discussed.

The outcomes of reactions of Cu(II) salts with 2-iodobenzoic acid (2-IBA) in acetonitrile in presence of different substituted pyridines (Py, 4-MePy, 4-EtPy, 3,4-MePy, 2,6-MePy, 2,4,6-MePy and 2,6-BrPy) (L) depend on the nature of Cu-containing precursors and L, resulting in [Cu2(2-IBA)4(CH3CN)2], [Cu2(2-IBA)4L2] or [Cu2L4(2-IBA)2Cl2] complexes. In...

The development of methods for targeted delivery of payload is a rapidly developing area of research.For this reason, iron oxide nanoparticles have potential to be used in delivery of substances by using external magnetic field. However it is necessary to develop methods of their modification, which will lead to the pos-sibility of immobilization o...

Reactions of [SbBr6]3- containing HBr solutions with bromide salts of 1,1'-(1,2-ethanediyl)bis(pyridine) (PyC22+) or 1,1'-(1,2-ethanediyl)bis(3,5-dimethylpyridine) (3,5-MePyC22+) initially result in the formation of the deep orange complexes Cat[SbBr5] (1 and 2), featuring unusual Sb···Br interactions in the solid state. In the mother liquor, 1 tra...

This article concerns studies of flexible track-etched membrane modification by photograft polymerization of methacrylic acid and subsequent formation of interpolyelectrolyte complexes with poly(allylamine) for enhancement of properties of electrochemical sensor. Optimal conditions leading to functionalization of the surface and maintenance of the...

This study investigated the biological removal of heavy metals from mine tailings in Kazakhstan using acidophilic microorganism strains Acidithiobacillus ferrivorans 535 and Acidithiobacillus ferrooxidans 377. The experiments were conducted in shake flasks at pH 1.6, various temperatures (28 °C, 18 °C, and 8 °C), and 10% solid concentration (w/v)....

The paper describes desalination by membrane distillation (MD) using ion-track membranes. Poly(ethylene terephthalate) (PET) ion-track membranes were hydrophobized by the immobilization of hydrophobic vinyl-silica nanoparticles (Si NPs). Si NPs were synthesized by the sol-gel method, and the addition of the surfactant led to the formation of NPs wi...

This paper presents the results of the study of iron oxide/gold composites using powder X-ray diffractometry (XRD), scanning (SEM) and transmission (TEM) electron microscopy, laser diffraction analysis (LDA) and Mössbauer spectroscopy (MS), as well as the results of their electrochemical tests as an anode material for lithium-ion batteries. It is e...

In connection with the widespread use of pesticides, the question arose of their possible danger to humans and the environment. The danger of using pesticides can be associated with the presence of residues in food products, with the pollution of water bodies, soil and other objects. Therefore, water treatment from pesticides is a major environment...

Boron neutron capture therapy (BNCT) is promising method of cancer treatment. Success implementation of BNCT depends on effectiveness of selective delivery of boron-rich compound into the cancer cells. In this paper, carboranes with 10 boron atoms per molecule were attached to superparamagnetic nanoparticles for realization of potential magnetic dr...

In this article, superparamagnetic Fe3O4 nanoparticles (NPs) were modified with tetraethoxysilane (TEOS) and 3-(trimethoxysilyl) propyl methacrylate (TMSPM), to create C = C double bonds for further graft polymerization of biocompatible glycidyl methacrylate (GMA). These modified Fe3O4 NPs can be used for payload attachment for magnetic targeted de...

In this article, NiFe2O4 nanoparticles (NPs) were prepared by co-precipitation method with subsequent thermal annealing leading to obtainment NPs with average sizes of 78 nm. Structure and magnetic analysis were performed by X-ray diffraction, transmission electron microscopy, Mössbauer spectroscopy and vibrating sample magnetometry techniques. Sta...

In this paper, we present the results of liquid low-level radioactive wastes (LLLRW) treatment by direct contact membrane distillation (DCMD) using polyethylene terephthalate (PET) track-etched membranes (TeMs). PET TeMs were modified by styrene and triethoxyvinylsilane (TEVS) using UV-induced grafting. Modification led to increase in the contact a...

Isostructural complexes [Cu(2-Br-5-MePy)2X2] (2-Br-5-MePy = 2-bromo-5-methylpyridine, X = Cl (1), Br (2) were prepared and structurally characterized. Magnetic measurements reveal that both complexes demonstrate paramagnetic behavior.

Nowadays, water quality monitoring is an essential task since environmental contamination and human exposure to heavy metals increased. Sensors that are able to detect ever lower concentrations of heavy metal ions with greater accuracy and speed are needed to effectively monitor water quality and prevent poisoning. This article shows studies of the...

The interaction of acetophenone, benzaldehyde and aniline in the one-pot-three-component Mannich reaction in the presence of composite membrane catalysts based on gold nanotubes (NTs) and NTs with mixed composition of Ag/Au was studied. NTs were synthesized by the electroless template approach in the pores of ion track membranes based on polyethyle...

This chapter is a brief review of the formation features of PET ion-track membranes with different pore parameters and an overview of their basic applications. The main aspects of membrane formation with pores of cylindrical and conical shapes are considered as well as an effect of irradiation and etching modes for the production of micro- and nano...

Magnetic nanoparticles based on Fe 3 O 4 and their modifications of surface with therapeutic substances are of great interest, especially drug delivery for cancer therapy includes boron-neutron capture therapy. The results of boron-rich compound (carborane borate) attachment to previously aminated by (3-aminopropyl)-trimethoxysilane iron oxide nano...

Magnetic Fe3O4 nanoparticles (NPs) and their surface modification with therapeutic substances are of great interest, especially drug delivery for cancer therapy, including boron-neutron capture therapy (BNCT). In this paper, we present the results of boron-rich compound (carborane borate) attachment to previously aminated by (3-aminopropyl)-trimeth...

This paper presents the results of the structural, corrosion, magnetic properties and cytotoxicity of magnetite nanoparticles, phase transformations was studied by thermal annealing. It was established that thermal annealing of Fe 3 O 4 nanoparticles led to three stages of phase transformations from magnetite to maghemite, with the subsequent forma...

This investigation compares bacterial leaching to chemical leaching to solubilize copper from a copper containing ore of the new site Northern Qarashoshaq in Zhylandy (Kazakhstan) which is currently under commercial development. From ICP-OES analysis, the bulk ore sample contains 1.5% of Cu and a trace level at 0.0024% of Ag. Phase analysis shows t...

Progress in biomedicine leads to the appearance of novel methods of treatment at both the molecular and cellular scales. This treatment requires the nanoscale materials, capable to affect locally being manipulated from outside. Magnetic nanotubes (NTs) are the promising tool for a variety of bioapplications, including targeted delivery driven by a...

The most important limitation for boron neutron capture therapy of cancer is the selective accumulation of boron compounds in tumor tissues in significant quantities. In this paper, we describe the possibility to use magnetic Ni/Fe nanotubes as carriers for boron delivery. Carborane derivatives containing 10 and 21 boron atoms per molecule were imm...

Stability of nanomaterials during their life cycle is a crucial problem of modern nanoscience. In order to understand the processes, which are going in the nanostructures, the comprehensive study of the influence of media with different acidity on the nickel nanotubes morphology and structure was carried out. On the base of the analysis of nanotube...

Recent developments in nanotechnology and application of magnetic nanoparticles, in particular in magnetic iron oxide nanosystems, offer exciting possibilities for cancer theranostics. This work focuses on the development of way of Fe3O4 nanoparticles surface functionalization with silicon based coatings for successful attachment of therapeutic age...

Nanoporous poly(ethylene terephthalate) track-etched membranes (PET TeMs) prepared by ⁺¹⁵Kr⁸⁴ ions bombardment (1.75 MeV per nucleon with the ion fluency of 4 × 10⁷ cm⁻²) and sequential etching were used in this study as a template for electrochemical deposition of highly ordered copper nanotube arrays. X-ray diffraction, scanning electron microsco...

Membrane distillation is a promising method for water desalination and wastewater treatment. This method requires membrane with high hydrophobicity, efficiency and low cost. In this study, track-etched membranes based on poly(ethylene terephthalate) (PET TeMs) with hydrophobic surface were prepared by modification using dichlorodimethylsilane and 1...

The effectiveness of membrane-based separations is limited by fouling of the membrane used. In order to mitigate this effect on PET track-etched membranes (PET TeMs), the methods of oxidation in hydrogen peroxide and radiation induced graft polymerization of acrylic acid (AA) and N-vinylimidazole (VIM) were used. The antifouling properties of the m...

Gold nanoparticles (Au NPs) possess unique properties for research due to their high stability and catalytic activity in electron transfer processes, such as hydrogenation reactions. One of the major challenges for application of Au NPs in heterogeneous catalysis is the search for better support materials to further increase their stability and cat...

Targeted delivery of drugs and proteins by magnetic field is a promising method to treat cancer that reduces undesired systemic toxicity of drugs. In this method, the therapeutic agent is attached through links to functional groups with magnetic nanostructure and injected into the blood to be transported to the problem area. To provide a local effe...

FeNi nanotubes with a length of 12 μm, a diameter of 400 nm, and a wall thickness of ~120 nm (obtained by template synthesis in the pores of polyethylene terephthalate ion-track membranes) are used to create a tool for the targeted delivery of drugs and genes. The possibility of coating their surface with a biocompatible polymer (polymethylmethacry...

Photoinduced graft polymerization of N-vinylimidazole (VI) and graft copolymerization of N-vinylimidazole with acrylic acid (AA) onto track-etched polyethylene terephthalate membranes (PET TeMs) with a pore diameter of 450 ± 15 nm have been systematically studied. The effect of different parameters, such as irradiation time, monomer concentration,...

New type of membranes with appropriate mechanical strength, thermal and chemical stability, high efficiency and hydrophobic surface are requisite for the development of membrane distillation (MD) applications. In this study hydrophobic track-etched membranes (TeMs) with pore size of 180 nm and thickness of 12 μm based on polyethylene terephthalate...

This paper reports on the synthesis and structure elucidation of the track-etched membranes with embedded gold nanotubes (prepared in etched-only and COOH-enriched PET track-etched membranes) as well as comparative testing of the catalytic activity of prepared composites. The carboxylic group functionality was enriched by successive oxidation by hy...

Due to the Ni nanotubes shape anisotropy, low specific density, large specific surface, uniform magnetic field have been offered as carriers for targeted delivery of drug or protein and the process of their formation from synthesis stage to the stage of surface modification and protein attaching has been demonstrated. Some steps to hasten their bio...

The paper presents results of various media influence on the degradation processes of FeNi nanostructures obtained by electrochemical synthesis.The dependence of the change in the degradation degree on acidity and residence time in the medium has been found. By X-ray diffraction and energy dispersion analysis it has been determined that the change...

In this article, we report on functionalization of track-etched membrane based on poly(ethylene terephthalate) (PET TeMs) oxidized by advanced oxidation systems and by grafting of acrylic acid using photochemical initiation technique for the purpose of increasing functionality thus expanding its practical application. Among advanced oxidation proce...

This is a report on the functionalization of track-etched membrane based on poly(ethylene terephthalate) (PET TeMs) by various advanced oxidizing systems/agents (H2O2/vis, H2O2/UV, Fenton/vis, Fenton/UV and O3 treatment) to compare with KMnO4/H2SO4, for the purpose of increasing hydrophilicity and functionality thus expanding potential applications...