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Publications (77)
Seawater-mixed concrete (SWC) is a proposed solution for catering to the needs of developing nations facing extremely severe water stress. Recent research works advocate the feasibility of producing SWC by adding supplementary cementitious materials (SCMs) and alternative reinforcements without reducing the engineering properties of the same. Howev...
This study presents a new approach towards the production of sol-gel silica-coated Bi2O3/Gd2O3 cement additives towards the improvement of early mechanical performance and radiation attenuation. Two types of silica coatings, which varied in synthesis method and morphology, were used to coat Bi2O3/Gd2O3 structures and evaluated as a cement filler in...
This study investigates the printability of one-part brick powder-based alkali-activated materials (AAMs) containing end-of-life brick particles as aggregate. The novel formulation showcases promise for 3D printing of small to medium-sized building blocks, reminiscent of a Lego-type system, capitalising on the rapid setting time inherent to one-par...
Incorporating metal oxide nanoparticles into cement-based composites delays the hydration process and strength gain of cementitious composites. This study presents an approach toward improving the performance of bismuth oxide (Bi2O3) and gadolinium oxide (Gd2O3) particles in cementitious systems by synthesizing core–shell structures via a sol-gel p...
Little is known about interactions of non-filamentous, complex-structured lytic phages and free, non-ordered nanoparticles. Emerging questions about their possible bio-sanitization co-applications or predictions of possible contact effects in the environment require testing. Therefore, we revealed the influence of various nanoparticles (NPs; SiO2,...
Experiments describing properties of nanomaterials on bacteria are frequently limited to the disk diffusion method or other end-point methods indicating viability or survival rate in plate count assay. Such experimental design does not show the dynamic changes in bacterial physiology, mainly when performed on reference microorganisms ( Escherichia...
Pseudomonas aeruginosa is a bacterium producing industrially utile metabolites, such as rhamnolipids, biopolymers, and pigments. Pyocyanin, the most studied example of pigments, is a virulence factor that also shows the potential for application in, e.g., agriculture, anticancer therapy, and energy production. Therefore, potential inhibitors and st...
This study determines the effect of spent garnet as a replacement for natural sand in 3D-printed mortar at early ages. Five mixes with different spent garnet amounts were prepared (0%, 25%, 50%, 75% and 100% by volume). The ratio of binder to aggregate remained unchanged. In all mixes the water/binder ratio was assumed as a constant value of 0.375....
In our study, we got carbon nanotubes by the Green engineering method. In this approach, the key element is silica nanospheres, that act as a catalyst carriers, prepared from the recycled ethanol-ammonia solution and copper wire from used cables. We used copper wires as a source of metal ions that were adsorbed by the silica nanospheres and then se...
In this study, the core–shell silica nanospheres modified with titanium dioxide were tested in the photocatalytic decomposition of dyes. The presented data underlines the advantages and shortcomings in the potential application of silica-based catalysts to neutralize organic pollutants. During the photocatalytic reaction in distilled water, catalys...
Nickel foams provide an easy and interesting template for novel strategies for the creation of micro and nanomaterials composites. Metal foam showed potential applications for preparation electrodes for supercapacitors and Li-ion batteries. Currently, foams are often studies as containments adsorbent. Here, we develop a nickel foam with graphene la...
Incorporating zinc oxide nanoparticles (ZnO NPs) into cement mortars may provide additional functions, e.g., self-cleaning and antibacterial or electroconductive ability. However, these NPs are also known for their potential toxicity. During the life cycle of a cement mortar, various abrasive forces cause the release of admixtures to the natural en...
Pseudomonas aeruginosa is a bacterium of high clinical and biotechnological importance thanks to its high adaptability to environmental conditions. The increasing incidence of antibiotic-resistant strains has created a need for alternative methods to increase the chance of recovery in infected patients. Various nanomaterials have the potential to b...
The emerging trend towards the reduction of SO2 in winemaking has created a need to look for alternative methods to ensure the protection of wine against the growth of undesired species of microorganisms and to safely remove wine microorganisms. This study describes the possible application of silica nanospheres as a wine stabilisation agent, with...
Herein, we present a facile synthesis route for the mesoporous silica nanoflakes on two types of templates and evaluate their potential as potential drug delivery systems. Silica materials are attractive due to their biocompatibility, low cytotoxicity, high surface area, and tunable pores. In addition, they can be multifunctionalized. These propert...
The nanomaterials are being increasingly used for modification of the cement composites properties. The aim of the research was determination of optimum content of the core-shell type Fe3O4/SiO2 nanoparticles in the cement paste for obtaining the tight structure of the high-strength paste. For this purpose, such investigation techniques as atomic f...
In this contribution, the synthesis of the metal−organic framework (MOF) based on lanthanum that exhibits trigonal prism shape is presented. The length of a single side of this structure ranges from 2 to 10 μm. The carbonized lanthanum-based organic framework (CMOF–La) maintained the original shape. However, the lanthanum oxide was reshaped in the...
Building materials are constantly improved with various additives and admixtures in order to achieve goals ranging from
obtaining increased durability or antimicrobial activity up to reducing the carbon footprint left by the cement production.
Since nanomaterials were proposed for cement products, many studies explored the possibilities for their i...
Correction for ‘MOF-5 derived carbon as material for CO 2 absorption’ by Wojciech Kukulka et al. , RSC Adv. , 2019, 9 , 18527–18537.
Background
Metal–organic frameworks (MOFs) derived carbonaceous materials functionalized with metal/metal-oxide nanoparticles are obtained by its carbonization. The carbonization of MOFs occurs simultaneously with the metal and metal-oxide particle formation. The carbon-based flake-like nanostructures with trapped metal/metal-oxide nanoparticles ha...
The versatility of nanomaterials allows their use in multiple applications. Their properties can be used in cementitious composites in order to mitigate the problem of microbiologically induced deterioration. Nevertheless, incorporating nanomaterials to such composites is associated with the agglomeration of nanoparticles and their release to the n...
In our study we prepared MOF-5 derived carbon to reveal the thermodynamics of CO2 absorption processes in great detail. Porous carbon material was prepared from a metal-organic framework (MOF-5) via carbonization at 1000 °C. The obtained structure consists only of carbon and exhibits a BET specific surface area, total pore volume and micropore volu...
Three kinds of carbon nanomaterials representing one-dimensional (carbon nanotubes (MWCNT)), two-dimensional (graphene oxide (GO)) and three-dimensional (hollow nanospheres (CS)) structures have been selected as additives for the formation of metal-organic frameworks derived carbon nanocomposites. For comparative study, the nanomaterials components...
This contribution investigates the effects of seawater and colloidal silica (NS) in the amounts of 1, 3 and 5 wt%, respectively, on the hydration, strength development and microstructural properties of Portland cement pastes. The data reveal that seawater has an accelerating effect on cement hydration and thus a significant contribution to early st...
Electrodes from carbonized Zn4O(1,4-benzodicarboxylic acid) (MOF-5) structures were prepared successfully via evaporating the solvent with a poly(vinylidene fluoride) (PVDF) binder. The solvent used for a nanocomposite cast was easily removed. Such an elegant method for preparing electrodes provides a facile, cost-effective, and void/cracking-free...
This study aims to investigate the effects of carbon nanotubes and carbon nanotube-silica core-shell structures, on the behaviour of cement pastes exposed to high temperature (300, 450 and 600 °C). Pristine multi-walled carbon nanotubes (MWCNTs) were coated with a solid nanosilica (NS) shell, to form a core-shell nanostructure (MWCNT/NS). The cemen...
This study investigates the effects of Fe3O4 and Fe3O4/SiO2 nanoparticle admixtures on the behavior of cement mortars exposed to elevated temperatures. Pristine nanoparticles of magnetite (Fe3O4) were coated with a solid silica shell (via the Stöber method), to form a core-shell nanostructure (Fe3O4/SiO2). The cement mortars were incorporated with...
The enhancement of the photocatalytic performance of graphitic carbon nitride (g‐C3N4, GCN) and titanium dioxide (TiO2) has played a key role in the energy and environmental protection research community. Therefore, it is necessary to explore the synergy of both materials with carbon nanostructures for photocatalysis. Among the variety of carbon ma...
Comprehensive study to evaluate the ability of hydrogen uptake by disordered mesoporous hollow carbon spheres doped witch metal such as Pt, Pd or Pt/Pd was conducted. They were synthesized facilely using sonication and then calcination process under vacuum at the temperature of 550 °C. The effect on hydrogen sorption at neat-ambient conditions (40...
Multiwalled carbon nanotubes (MWCNTs) have attracted huge attention due to their multifunctionality. Their unique properties allows for covalent and noncovalent modifications. The most simple method for functionalization of carbon nanotubes is their decoration with the oxygen containing moieties which can be further simultaneously functionalized fo...
Ordered nanocrystalline titania-mesoporous silica nanotube structures are synthesized by hydrolysis of the titania precursor inside pours silica shell. Silica coating surrounding carbon nanotubes was further removed by thermal reduction. The proposed method of functionalization silica channels with the titania nanoparticles preclude aggregation of...
Nanoparticles were proposed as antibacterial cement admixtures for the production of cement-based composites. Nevertheless, the standards for evaluation of such admixtures still do not indicate which model organisms to use, particularly in regard to the further application of material. Apart from the known toxicity of nanomaterials, in the case of...
Herein, we report study about adsorption kinetics of rhodamine B onto metal organic framework containing cobalt (CoOF). The CoOF can be successfully produced from the reused waste - organic ligands and solvents. The as-prepared material was carbonized and purified prior testing. The adsorbent was characterized with scanning electron microscopy (SEM...
A disordered mesoporous hollow carbon spheres were decorated with Pd nanoparticles and their H2 sorption performance was examined at 40 °C and up to 45 bar. It was found that Pd supported carbon spheres exhibited enhanced H2 uptake capacity in comparison to the pristine material, despite the fact that their surface area and porosity decreased after...
The scope of the study is to test the influence of nanocomposite silica-titania (mSiO2/TiO2) core-shell structures on the mechanical and bactericidal properties of cement mortars. Nanocomposites are widely applied in many fields of science however, cement-based composites are mainly modified with single type of nanostructures. The goal of the prese...
In this study, UV-C light was tested as an alternative method to inactivate microorganisms in the must of 'Regent' red grape cultivar. The control sample containing the microorganism diluted in a physiological NaCl solution was prepared to take into consideration different conditions of liquids, such as turbidity and colour. Additionally, the chang...
In this contribution, we present a synthesis and carbonization mechanism of metalorganic frameworks based on the cobalt and terephthalic acid, with detailed attention to the carbonization mechanism of cobalt-based organic frameworks. The presented evolution of unique morphology of carbonized cobalt organic frameworks induced by the temperature allo...
AbstractIn this contribution the effect of nanosilica (NS) on the behavior of cement mortars containing quartz aggregate and two types of heavyweight aggregates (magnetite and barite) exposed to elevated temperature will be investigated. The cement mortars have been modified with nanosilica in quantities of 1%, 2%, 3%, 4% and 5% (by weight of cemen...
In recent years, graphene and its derivatives have been extensively investigated because of their unique properties, which can be used in many fields including biomedical applications. Therefore, detailed biological study is required. In the current paper the detailed toxicological studies on single and four layer graphene oxide (GO) nanoflakes is...
Pristine nanoparticles of magnetite were coated by solid silica shell forming core/shell structure. 20 nm thick silica coating significantly enhanced the chemical and thermal stability of the iron oxide. Chemical and thermal stability of this structure has been compared to the magnetite coated by mesoporous shell and pristine magnetite nanoparticle...
The incorporation of nanosized particles into the building materials can significantly influence their properties. Such noticeable modification of the properties of cement-based composite is not possible with traditional cement binders and mineral additives. Heavyweight cement concretes are used for production of the radiological shields in the obj...
In this study, ethanol–ammonium recovery using a distillation system was evaluated. The experimental design was used to evaluate the possibility of solvent re-use and the influence of distillation on the recovery yield, ethanol–ammonium ratio (catalyst concentration) and size of the obtained nanostructures. The synthesised silica nanospheres from d...
In the last decade, nanotechnology has been gathering a spectacular amount of attention in the field of building materials. The incorporation of nanosized particles in a small amount to the building materials can influence their properties significantly. And it can contribute to the creation of novel and sustainable structures. In this work, the ef...
Graphene is one of novel nanomaterials that express variety of interesting features, including high conductivity and characteristic shape of layers. Nevertheless, researchers still seek for an application for this nanomaterial. On the other hand, there are concerns associated with the potential impact of these nanostructures on living organisms. Re...
Thermal decomposition of isoreticular metal organic frameworks (MOF-5) results in the breaking of carboxylic bridges between organic ligand and Zn4O clusters and producing zinc oxide crystals along with amorphous mesoporous carbon. In this contribution we present a carbonization mechanism for MOF-5, with detailed attention given to the extraction o...
The recycling of waste glass is a major problem for municipalities worldwide. The problem concerns especially colored waste glass which, due to its low recycling rate as result of high level of impurity, has mostly been dumped into landfills. In recent years, a new use was found for it: instead of creating waste, it can be recycled as an additive i...
Titania/silica nanomaterials have many possible applications; however, they can be toxic to living organisms, particularly if the material accumulates in niche environments, e.g. areas colonised by actinomycetes. This study therefore investigated the effect of non-activated and UV light-activated titania/silica nanospheres on an environmental Strep...
We present the new promising nanostructure- sandwich-like mesoporous silica nanoflakes synthesized on graphene oxide sheets core. In the first step biocompatibility of the nanoflakes with PEG and without functionalization in human fibroblast, melanoma and breast cancer cells was assessed. In order to define the cellular uptake in vitro and biodistr...
The aim of the study was to assess the influence of rotating magnetic field (RMF) on the morphology, physicochemical properties, and the water holding capacity of bacterial cellulose (BC) synthetized by
Gluconacetobacter xylinus
. The cultures of
G. xylinus
were exposed to RMF of frequency that equals 50 Hz and magnetic induction 34 mT for 3, 5, an...
A uniformly coated MoS2/Carbon-nanocomposite with three-dimensional hierarchical architecture based on carbonized bacterial cellulose (CBC) nanofibers is synthesized by a facile one-step hydrothermal method followed by thermal annealing at 700 {\deg}C in Ar atmosphere. Strong hydrogen bonds between the Mo precursor and the BC nanofibers are found t...
In the last decade nanomaterials due to their unique physical and chemical properties, have attracted the interest of researchers to fabricate new building materials with novel functions. One of the most referred to and used cementitious nanosized materials is nanosilica (nSiO2). Although the number of publications devoted to the influence of nanos...
The properties of mesoporous silica nanoparticles including large surface area, large pore volume, easy surface functionalization and control of structure and pore size has made them promising drug carriers. In this study, the effect of different diameters (50 nm, 70 nm, 90 nm, 110 nm and 140 nm) of silica nanospheres with a solid core and mesoporo...
In this paper, we present the technology of synthesis, characterization and release kinetics of anticancer drug molecules from sandwich-like mesoporous silica nanoflakes. Mesoporous silica nanoflakes are a very attractive material due to their versatility, low cytotoxicity, large surface area, high pore volume and unique feature of containing paral...
Background: Titania/silica nanomaterials are commonly studied as the titanium dioxide alternative for the industry. In spite of nano silica and titanium dioxide applications they may also be toxic to living organisms. Nanostructures are likely to accumulate in ecological niches colonised by bacteria such as Streptomyces. These bacteria play a key r...
In the paper the new method of nanosilica addition to cement as an suspension in acetone was tested. It was found that this method helps to avoid the non-uniformly dispersed nanosilica particles in mortar. However, simultaneously it caused the air content in the fresh mortars to be increased. Thus the positive influence of nanosilica on mortar stre...
Recent research is focused on the enhancement in photoactivity of titanium dioxide/carbon nanotubes through formation of novel nanocomposites that exhibit a high specific surface area, remarkable electron transfer and biocompatibility. Here, we explore a new synthesis route in the system composed of nanocrystalline titanium dioxide supported on ext...
In this study, the efficiency of the adsorption of anionic dye Direct Red 23 (DR23), nonionic dye Direct Green 97 (DG97) and cationic dye Basic Yellow 28 (BY28) from aqueous solutions onto hollow mesoporous carbon nanospheres (HMCN) was investigated. The adsorbent was characterized by means of XRD, HRTEM, TGA, Raman spectroscopy, FTIR, BET and zeta...
In this paper, we study synthesis and characteristics of mesoporous silica nanotubes modified by titanium dioxide, as well as their antimicrobial properties and influence on mitochondrial activity of mouse fibroblast L929. Nanocrystalized titania is confined in mesopores of silica nanotubes and its light activated antibacterial response is revealed...
In this study, hollow mesoporous carbon nanospheres (HMCN) prepared from core–shell structured mesoporous silica sphere using chemical vapor deposition were used as a novel adsorbent for the investigation of the adsorption of two acid dyes: Acid Orange 8 (AO8) and Acid Red 88 (AR88) from aqueous solutions. The adsorbent was characterized by X-ray d...
The synthesis of designed nanostructures is an ultimate target of nanomaterial science. Here, silica spheres with nanoholes have been selectively prepared. Coating the necklace-like structured and magnetic nanoparticles along carbon nanotubes, which is an essential step of the simple synthetic procedure of silica hollow spheres, led to the formatio...
We propose the synthesis and characterization of colloidal aluminium selenide nanocrystals using trioctylphosphine as a solvent. The nanoparticles have several absorption bands in the spectral region 330-410 nm and are bright UV-blue luminescent, which is well demanded in light collecting and emitting devices, e.g. for tuning their spectral charact...
The work is devoted to study the influence of nanosilica with (m-Si02) and without (n-Si02) mesoporous shell additions on Portland cement mortars mechanical properties. The results have shown that these additions increase the compressive and flexural strength of mortars. The highest flexural strength have the mortars with 3% addition of cement mass...
In this contribution we present comparative study on synthesis, bio-characterization and antibacterial properties of mesoporous silica nanospheres modified by titanium dioxide. Mesoporous silica nanospheres functionalized by titania were studied as light activated antibacterial agents. The analysis of the antibacterial effects on E. coli ATCC 25922...
The growth of iron filled multiwalled carbon nanotubes (Fe-MWCNT) using chemical vapour deposition (CVD) has been widely studied. Considering the remarkable magnetic and structural properties of Fe-MWCNT, these materials have been applied in numerous areas. In particular their biomedical application has been explored, where Fe-MWCNT can be used in...
A new kind of silica nanotube with incorporated γ-Fe(2)O(3) nanoparticles has been successfully prepared through sol-gel processes. Hematite particles supported on carbon nanotubes served as templates for the fabrication of the magnetic silica nanotubes. The obtained nanostructures consisting of magnetic Fe(2)O(3) nanoparticles protected by a silic...
Mesoporous hollow carbon spheres have been fabricated from core–shell structured mesoporous silica sphere using chemical vapor deposition (CVD) with ethylene as a carbon feedstock. The hollow carbon spheres have exhibited relatively high graphitization degree along with good meso-structural order and high specific surface area of 770 m2/g. It was a...
The facile bulk synthesis of silica nanospheres makes them an attractive support for the transport of chemical compounds such
as nanocrystalline titanium dioxide. In this contribution we present a promising route for the synthesis of mesoporous silica
nanospheres (m-SiO2) with diameter in range 200nm, which are ideal supports for nanocrystalline ti...
The initial development of carbon nanotube synthesis revolved heavily around the use of 3d valence transition metals such as Fe, Ni, and Co. More recently, noble metals (e.g. Au) and poor metals (e.g. In, Pb) have been shown to also yield carbon nanotubes. In addition, various ceramics and semiconductors can serve as catalytic particles suitable fo...
A facile approach to prepare parallel mesoporous carbon nanotubes fabricated from an anodised aluminum oxide (AAO) template loaded with mesoporous silica by combining sol–gel and chemical vapor deposition (CVD) techniques is presented. The carbon nanotube walls that grow during CVD process copy the mesoporous structure of silica without removing th...
In this contribution we present an easy and efficient method for the controlled synthesis of highly uniform silica coated coaxial carbon nanotubes (CNT). Furthermore, the thickness of silica wall, CNT, and the diameter of CNT could be controlled at will. This process involves the use of an anodized aluminum oxide (AAO) template to grow this molecul...
