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Search results for: SINTERED POROUS METALS
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Dispersive Micro‐Solid Phase Extraction of Selected Metals in Water and Food Samples Followed by ICP‐OES Analysis: Method Development, Analysis of Real Samples and Greenness Evaluation
PublicationMultiwalled carbon nanotubes (MWCNTs) are well-known adsorbents because of their high surface area, layered and hollow architecture, hydrophobicity, and multiple and easily accessible adsorption sites. In this study, MWCNTs were used for dispersive micro-solid-phase extraction of various metal chelates in environmental and food samples. Different parameters such as concentration of the chelating reagent, the sorbent dosage, the...
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CO2 uptake capacities of PCMCA-900 (potassium citrate-derived porous carbon prepared at 900 °C) adsorbent at various temperatures
Open Research DataThese data contain CO2 uptake capacities of PCMCA-900 (potassium citrate-derived porous carbon prepared at 900 °C) adsorbent at various temperatures. Adsorption experiments were carried out at temperatures 0 °C, 25 °C, and 50 °C at 1 bar.
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Uspekhi Fiziki Metallov-Progress in Physics of Metals
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Keikinzoku/Journal of Japan Institute of Light Metals
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The fate and contamination of trace metals in soils exposed to a railroad used by Diesel Multiple Units: Assessment of the railroad contribution with multi-tool source tracking
PublicationSoil samples from cut slopes from lightly loaded railway lines used by Diesel Multiple Units for 5 years in Gdansk (Poland) were collected and analyzed for trace metals (TMs): Zn, Pb, Cd, Ni, Cr, Cu, and Fe. The main aim was to assess soil enrichment, contamination status, and distribution of TMs relative to the distance from the railway track. Extensive source tracking analyses were performed using cluster analysis (CA) and the...
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Eucalyptus derived heteroatom-doped hierarchical porous carbons as electrode materials in supercapacitors
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Transforming polystyrene waste into 3D hierarchically porous carbon for high-performance supercapacitors
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Application of differential scanning calorimetry to study porous structure of hydrothermally modified silicas
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High temperature oxidation of porous alloys for solid oxide fuel cell applications
PublicationW pracy proszki PI600, 317L i 430L stali użyto do przygotowania porowatych metalowych podłoży dla tlenkowych ogniw paliwowych. Po spiekaniu w różnych temperaturach oceniana była ich porowatość i wysokotemperaturową odporność na korozję. Cykliczna analiza termograwimetryczna, dyfraktometria rentgenowska i obrazów SEM były używane do opisu właściwości tych porowatych stopów. Właściwości elektryczne badano dla wybranych próbek. Wpływ...
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Porous Phantoms Mimicking Tissues – Investigation of Optical Parameter Stability Over Time
PublicationIn terms of optical parameters, optical phantoms can now replace live tissues and be used to validate optical measurement methods. Therefore, whether these parameters would be maintained after storage for 6 months was examined. The absorption and scattering coefficients were obtained from the measured transmittance and reflectance measurements taken 6 months apart and then compared. All of the measurements were conducted using...
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Upscaling unsaturated flow in binary porous media with air entry pressure effects
PublicationArtykuł dotyczy przepływu w gruntach nienasyconych, zawierających soczewki (inkluzje) materiału gruboziarnistego. Materiał inkluzji charakteryzuje się niższą wartością ciśnienia wejścia powietrza niż materiał tła. Podczas infiltracji część powietrza zostaje zamknięta w inkluzjach, po całkowitym wypełnieniu wodą materiału tła. Z drugiej strony, drenaż inkluzji rozpoczyna się dopiero wtedy, gdy przekroczone zostanie ciśnienie wejścia...
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Influence of porous coating on heat transfer during R22 and R134a flow boiling.
PublicationPrzedstawiono wpływ powłoki porowatej na przenoszenie ciepła i spadku ciśnienia podczas wrzenia w przepływie czynników chłodniczych, R22 i R134a.
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JOURNAL OF POROUS MATERIALS
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JOURNAL OF POROUS MEDIA
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TRANSPORT IN POROUS MEDIA
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Development of a new green analytical methodology for the determination of phthalates in single-use babies diapers using ultrasound-assisted extraction and polypropylene porous membrane
PublicationA green extraction strategy was developed and utilized for the extraction and determination of phthalates. The extraction is based on ultrasound-assisted extraction and a polypropylene porous membrane. The Box-Behnken model was performed to optimize the extraction condition. The optimal extraction conditions are 5.5 mL of ethyl acetate, 10 min of extraction time and 55 C for extraction temperature. The developed green extraction...
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Optical Parameters Stability Over Time of Porous Phantoms Mimicking Tissues
Open Research DataOptical phantoms are used to validate optical measurement methods. The stability of their optical parameters over time allows them to be used and stored over long-term periods while maintaining their optical parameters. The aim of the presented research was to investigate the stability of fabricated porous phantoms, which can be used as a lung phantom...
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Role of biochar-based free radicals in immobilization and speciation of metals in the contaminated soil-plant environment
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Enzymatic assays confirm the toxicity reduction after manure treatment of heavy metals contaminated soil
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Spider Webs and Lichens as Bioindicators of Heavy Metals: A Comparison Study in the Vicinity of a Copper Smelter (Poland)
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Heavy Metals and Metalloids Leachability from Composite Ground Materials Peat – Fly Ash – Lime
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Concentrations of heavy metals and PCBs in the tissues of European beavers (Castor fiber) captured in northeastern Poland
PublicationEuropean beavers (Castor fiber) from two regions were examined to identify exposure to persistent environmental contaminants. A reference group was comprised of six animals from the Forest Division of Srokowo, and an exposed group was comprised of five animals from the vicinity of a former military airport operated in 1918–1986—both from Warmia land in Poland. 137 Cs in beavers' muscles was considered negligible for the overall...
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A new simple approach to prepare rare-earth metals-modified TiO2 nanotube arrays photoactive under visible light: Surface properties and mechanism investigation
PublicationApplication of Ti90RE10 alloys (RE = Ho, Er, Nd, Y, Ce, Tm) as a working electrode, instead of Ti pure foil in anodic oxidation in a fluoride-based electrolyte, resulted in formation of well-ordered nanotubes made of TiO2 and RE2O3 mixture, which could be efficiently used for pollutant removal from water and air phase upon UV and visible irradiation and easily separable from the reaction mixture to recycle. The as-prepared NTs...
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Application of shifted Chebyshev polynomial-based Rayleigh–Ritz method and Navier’s technique for vibration analysis of a functionally graded porous beam embedded in Kerr foundation
PublicationPresent study is dealt with the applicability of shifted Chebyshev polynomial based Rayleigh-Ritz method and Navier’s technique on free vibration of Functionally Graded (FG) beam with uniformly distributed porosity along the thickness of the beam. The material properties such as Young’s modulus, mass density, and Poisson’s ratio are also considered to vary along the thickness of the FG beam as per the power-law exponent model....
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Chapter 14 : A new concept of highly porous bioactive titanium alloys with hydroxyapatite coatings
PublicationPrzedstawiono koncepcję biomateriału o wysokiej bioaktywności i odporności na korozję. Omówiono metody wytwarzania porowatych stopów tytanu, techniki utleniania, techniki nakładania porowatego hydroksyapatytu, nakładanie bioaktywnych polimerów, metody badan i modelowania struktur porowatych.
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Nitrogen-doped porous carbon embedded with cobalt nanoparticles for excellent oxygen reduction reaction
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Hierarchical porous carbon sheets derived on a MgO template for high-performance supercapacitor applications
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Biomass-derived robust three-dimensional porous carbon for high volumetric performance supercapacitors
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Sustainable polylysine conversion to nitrogen‐containing porous carbon flakes: Potential application in supercapacitors
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Novel strategy for preparation of highly porous carbon sheets derived from polystyrene for supercapacitors
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Sustainable recycling of waste polystyrene into hierarchical porous carbon nanosheets with potential applications in supercapacitors
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Well-Designed Porous Graphene Flakes for Lithium-Ion Batteries with Outstanding Rate Performance
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Characterization and capacitive performance assessment of potato peels derived salt-induced porous carbons
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Fabrication of flexible highly ordered porous alumina templates by combined nanosphere lithography and anodization
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Low temperature removal of SO2 traces from air by MgO-loaded porous carbons
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Porous silica matrix as an efficient strategy to boosted photocatalytic performance of titania/carbon composite
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Fabrication methods of porous perovskite type ceramics for Solid Oxide Fuel Cells (SOFCs)
PublicationPublikacja opisuje metody wytwarzania porowatych materiałów ceramicznych o strukturze perowskitu.
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A novel hierarchically-porous diamondized polyacrylonitrile sponge-like electrodes for acetaminophen electrochemical detection
PublicationA novel composite electrode material consisting of tangled fibrous polyacrylonitrile-based hierarchically-struc- tured nanocomposites has been produced by wet-spinning, carbonized and decorated with a carbon nano- architecture by microwave plasma-enhanced chemical vapor deposition and investigated as a metal-free electrode for the enhanced electrochemical detection of acetaminophen. Surprisingly, the hierarchical fiber ar- chitecture...
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Unstructured finite-volume meshes for two-dimensional flow in variably saturated porous media
PublicationW pracy opisano rozwiązanie równania przepływu nienasyconego w ośrodkach porowatych z wykorzystaniem metody objętości skończonych. Przedstawiono różne sposoby tworzenia siatki numerycznej. Przeprowadzono analizę wpływu sposobu uśredniania współczynnika filtracji między sąsiednimi objętościami skończonymi na dokładność wyników.
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Microstructure and electrical properties of SrTi0.98Nb0.02O3-δ-based composites applied as porous layers for SOFCs
PublicationPrzebadano właściwości elektryczne oraz strukturalne kompozytów Sr(Ti,Nb)O3-YSZ i Sr(Ti,Nb)O3-CeO2 naniesionych w postaci warstw porowatych na podłoża YSZ
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Spectroscopic properties of Rhodamine B entrapped in hybrid porous nanolayers at high dye concentration
PublicationThe preparation procedure and characterization of Rhodamine B entrapped in zirconia, silica and mixed silica–zirconia nanolayers is described. The nanolayers were produced by the sol–gel spin-coating technique. The pronounced effect of the dye concentration on the absorption and fluorescence spectra as well as on time-resolved fluorescence spectra was found. The results show that the aggregation of Rhodamine B is stronger in silica...
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Modelling water flow in unsaturated porous media: Accounting for nonlinear permeability and material heterogeneity
PublicationW pracy przedstawiono problematykę matematycznego modelowania przepływów w nienasyconych ośrodkach porowatych, ze szczególnym uwzględnieniem dwóch aspektów. Pierwszym z nich jest obliczanie średniego współczynnika przewodności hydraulicznej między węzłami siatki w numerycznym rozwiązaniu równania przepływu nienasyconego. Drugim zagadnieniem jest wpływ lokalnej zmienności parametrów ośrodka porowatego (współczynnika przewodności...
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Influence of porous coating on heat transfer during flow boiling of R22, R134a and R407C
PublicationPrzedstawiono wpływ pwłoki porowatej w pozionej rurce podczas wrzenia w przepływie i spadku ciśnienia czynników chłodniczych R22, R134a i R407C.
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XPS (X-ray photoelectron spectroscopy) spectra and high-resolution spectra of C 1 s and O 1 s of the PCMCA-X (potassium citrate derived porous carbon materials obtained at various temperatures)
Open Research DataThese data include XPS full spectra and high-resolution spectra of C 1 s and O 1 s of the (potassium citrate derivedporous carbon material obtained at 700 °C), PCMCA-800 (potassium citrate derived porous carbon material obtained at 800 °C), PCMCA (potassium citrate derived porous carbon material obtained at 900 °C). The elemental composition on the...
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Oxygen partial pressure and temperature dependence of Gerischer element of symmetrical porous Sr0.86Ti0.65Fe0.35O3 electrode on CGO substrate
Open Research DataThis dataset contains values of Gericher element at different temperatures (800 °C, 750 °C, 700 °C, 650 °C and 600 °C)and oxygen partial pressures (20%, 10%, 5%, 1%, 0.1% and 0.01% pO2) of symmetrical Sr0.86Ti0.65Fe0.35O3 electrode sintered at 1000 °C. This values were obtained by fitting each measured impedance spectra by electrical equivalent circuit...
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Oxygen partial pressure and temperature dependence of series resistance of symmetrical porous Sr0.86Ti0.65Fe0.35O3 electrode on CGO substrate
Open Research DataThis dataset contains values of series resistance (R) at different temperatures (800 °C, 750 °C, 700 °C, 650 °C and 600 °C) and oxygen partial pressures (20%, 10%, 5%, 1%, 0.1% and 0.01% pO2) of symmetrical Sr0.86Ti0.65Fe0.35O3 electrode sintered at 1000 °C. This values were obtained by fitting each measured impedance spectra by electrical equivalent...
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Ultrasound assisted solvent extraction of porous membrane-packed samples followed by liquid chromatography-tandem mass spectrometry for determination of BADGE, BFDGE and their derivatives in packed vegetables
PublicationThe problem of the presence of trace organic pollutants in food is of growing importance due to increasing awareness about their impact on newborns, infants and adults of reproductive age. Despite the fact that packaged food products offer many advantages, packaging can be a source of contamination for stored food. Thus, monitoring such pollution in food is of high importance. In this work, a novel methodology based on the solvent...
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A hierarchical porous composite magnetic sorbent of reduced graphene oxide embedded in polyvinyl alcohol cryogel for solvent‐assisted‐solid phase extraction of polycyclic aromatic hydrocarbons
PublicationA hierarchical porouscomposite magnetic sorbent was fabricated and applied tothe dispersive solvent-assisted solid-phase extraction of five polycyclic aromatichydrocarbons. A sorbent was first prepared by incorporating graphene oxide,calcium carbonate, and magnetite nanoparticles into a polyvinyl alcohol cryo-gel. The graphene oxide was converted to reduced graphene oxide using ascorbicacid and a hierarchical porous structure was...
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Use of Innovative and Advanced Computer Simulations of Chemical Speciation of Heavy Metals in Soils and Other Environmental Samples
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Chemical-vapor generation of transition metals through the reaction with tetrahydroborate in recent achievements in analytical atomic spectrometry
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