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AdsorbentAtomsDesorptionIsothermInfluence the adsorptionMolecularMonolayerIsothermsGaseousIonsLangmuirParticlesAbsorptionAdsorbPhysical adsorptionProcessesSingle moleculeSelectivelyOccursWastewaterGrapheneChemisorptionAdsorbentsElectrostatic attractionProcessInteractGasesEnergiesCompoundsHydrogenSurfacesOrganicSubstancePoresRutileUptakeEfficiencyTemperatureConcentrationDependsPolymersInteractionAttractSensitivityTiO2GibbsEquilibriumTransition metalsSpeciesSurface tensionPharmaceuticalResultsKineticWaterSite
Adsorbent20
  • This process creates a film of the adsorbate on the surface of the adsorbent. (wikipedia.org)
  • Adsorption is a surface phenomenon and the adsorbate does not penetrate through the surface and into the bulk of the adsorbent, while absorption involves transfer of the absorbate into the volume of the material, although adsorption does often precede absorption. (wikipedia.org)
  • However, atoms on the surface of the adsorbent are not wholly surrounded by other adsorbent atoms and therefore can attract adsorbates. (wikipedia.org)
  • The adsorption of gases and solutes is usually described through isotherms, that is, the amount of adsorbate on the adsorbent as a function of its pressure (if gas) or concentration (for liquid phase solutes) at constant temperature. (wikipedia.org)
  • The highest dye removal was achieved when the operating parameters were optimized, including pH = 6.0, adsorbent dose = 0.4 g, contact time = 90 min, initial adsorbate conc. (iwaponline.com)
  • Citrus limetta peel powder is cheap, effective and potential adsorbent for Congo red adsorption from wastewater. (iwaponline.com)
  • are empirical constants for each adsorbent-adsorbate pair at a given temperature. (wikipedia.org)
  • Langmuir surface area depends on adsorption capacity of the adsorbent. (stackexchange.com)
  • The name given to the adhered substance on the surface is known as adsorbate, while the surface is named adsorbent. (reportsanddata.com)
  • The analysis of Berezin and Kiselev's concept assuming linear association of molecules in a localised adsorption monolayer on the homogeneous surface of a solid adsorbent was carried out. (sciendo.com)
  • The adsorption efficiency of the three polymers toward Pb(II) and various toxic metal ions present in sewage was evaluated as a function of adsorbent dose, time, temperature, pH value, and initial ion concentration to determine optimum adsorption conditions. (biomedcentral.com)
  • This results in an adsorbate film on the adsorbent surface. (corrosionpedia.com)
  • Yet, when atoms on the adsorbent surface are not fully surrounded by others atoms of adsorbent, these atoms could attract adsorbates. (corrosionpedia.com)
  • Consequently, it is highly desirable that Fe 3 O 4 @MC/APTMS magnetic nano-biocomposite could be used as a promising adsorbent for TC adsorption from aqueous solutions. (researchsquare.com)
  • The activated carbon element is the adsorbent, while the dust and smoke particles are adsorbates. (softsecrets.com)
  • Adsorption does not change its adsorbent visually. (softsecrets.com)
  • Odor molecules are simply "swallowed" in the process, without changing the volume, color, or any other property of the adsorbent. (softsecrets.com)
  • This type of adsorption occurs when the force of attraction between the adsorbent molecules (the contaminant being removed) and the activated carbon surface is stronger than the force of the adsorbent molecules themselves. (activatedcarbon.net)
  • The randomness of the overall process decreases due to the presence of a force of attraction between adsorbent and adsorbate due to which the gas molecules stick to the surface. (ncertmcq.com)
  • Adsorption is an exothermic process since surface particles of the adsorbent are unstable and when the adsorbate is adsorbed on the surface, the energy of adsorbent decreases, and this results in the evolution of heat. (ncertmcq.com)
Atoms11
  • Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. (wikipedia.org)
  • The helium spin-echo method (HeSE), developed largely at the Cavendish, has revealed how surface atoms, and molecules, interact with each other and with the heat-bath provided by the substrate. (cam.ac.uk)
  • We plan to extend NIXSW to investigate low atomic number species (atoms and in molecules) on transition metals, local adsorbate geometry at low coverage and to exploit 'chemical shift' NIXSW to determine the local adsorption geometries of coadsorbates. (ukri.org)
  • The process of adsorption consists of the adhesion of atoms, ions, or molecules of substances that are present in gaseous or liquid forms onto a solid substrate surface. (reportsanddata.com)
  • In chemisorption of small molecules on Pt(111), each Bi adatom blocks about two Pt surface atoms. (aip.org)
  • In this process, there is the adhesion of ions, atoms and molecules from liquid, gas and dissolved solids to a particular surface. (corrosionpedia.com)
  • When contaminants like chlorine adsorb on carbon, ion, chlorine molecules, or atoms create a film on the charcoal. (awesomewaterfilters.com.au)
  • Absorption occurs when ions, atoms, or molecules pass into a bulky material. (coirabsorbent.com)
  • We study metal-organic structures on solid surfaces, which can be ensembles of adsorbed molecules or self-assembled systems of organic molecules and metal atoms, by synchrotron-radiation-based x-ray spectroscopy. (fu-berlin.de)
  • To that end, an improved understanding of the magnetic properties and the relevant mechanisms responsible for magnetic coupling between metal atoms or between adsorbate and substrate is imperative. (fu-berlin.de)
  • These are very different for adsorbates adsorbed onto the same transition metal surface, but which have different coordination with surface metal atoms. (tue.nl)
Desorption8
  • The term sorption encompasses both adsorption and absorption, and desorption is the reverse of sorption. (wikipedia.org)
  • High electric fields of the order of several Vnm influence the adsorption- and desorption-processes of molecules. (dtic.mil)
  • The effect of the external field on the adsorption and desorption processes should be particularly distinct if a polar adsorbate e.g. water is used. (dtic.mil)
  • We were able to track and map the distribution and ordering of adsorbate molecules in five members of the mesoporous MOF-74 series along entire adsorption-desorption isotherms," Yaghi says. (phys.org)
  • The adsorption-desorption process was performed for five successive cycles. (aaqr.org)
  • Control valves allow to switch the gas flow, so each of the adsorbers alternates between adsorption and desorption modes. (dieselnet.com)
  • The governing mechanisms of adsorption and desorption constitute an area under active research as many models have been proposed but the physics has not been fully honored. (ifpenergiesnouvelles.fr)
  • Although adsorption/desorption process is a physical phenomenon and a reversible process resulting from inter-molecular and the intramolecular association between molecules and surfaces, modeling these phenomena requires molecular level understanding. (ifpenergiesnouvelles.fr)
Isotherm6
Influence the adsorption1
  • Factors that can influence the adsorption process include the properties of the activated carbon (e.g. pore size distribution, surface area), the properties of the adsorbate molecules (e.g. size, shape, concentration) and the conditions of the process (e.g. temperature, pH and the presence of other compounds). (activatedcarbon.net)
Molecular7
  • The adsorption cross section of an adsorbate depends on numerous factors, not just the molecular size. (stackexchange.com)
  • In the case of molecular adsorption, we find a small positive charge on the adsorbate. (nist.gov)
  • For the complete series of adsorbates studied (methanol, ethanol, isopropanol, ethylene glycol, glycerol, hydrogen peroxide and formic acid) there is a linear relationship between the change in the work function and the adsorption energy for the molecular adsorption mode. (nist.gov)
  • This indicated that the adsorption process of the ACS with respect to Cr(VI) was mainly via single molecular layer adsorption and chemisorption. (westflo.org)
  • On-surface reactions are a promising way of modifying molecules and obtaining new molecular arrangements, frequently difficult or impossible to obtain otherwise. (fu-berlin.de)
  • The adsorption energies and the respective electronic structures of adatoms H, C and O and molecular fragments CHx (x = 1-3) are compared with those of the analogous molecules that contain a single transition metal atom. (tue.nl)
  • The difference in bond energies of adsorbates and transition metal molecules, i.e. the embedding energy, is shown to consist of three contributions: quenching of the sometimes high molecular spin states, weakening of the adsorbate-surface interaction energy and weakening of the metal-metal atom bond energies next to the adsorbate. (tue.nl)
Monolayer5
  • At the maximum adsorption, only a monolayer is formed. (wikipedia.org)
  • The obtained results were in good agreement with the Brunauer-Emmett-Teller model of multilayer physisorption, which suggests that the hydrophobin coating enhanced the sensitivity by improving the monolayer adsorption capacity. (researchgate.net)
  • Langmuir adsorption model considers that only a monolayer of adsorbate can be formed on top the surface. (stackexchange.com)
  • As correctly identified, the Langmuir model assumes a monolayer of adsorbed molecules. (stackexchange.com)
  • What is a typical monolayer formation time for liquid phase adsorbate on a solid surface? (stackexchange.com)
Isotherms2
  • In addition to these investigations, a variety of methods were also employed in order to discover the average pore size of some of the samples from their adsorption isotherms. (gla.ac.uk)
  • The results of this investigation showed that for the carbons in this work at least, reliable results on average pore sizes could not be deduced from the adsorption isotherms. (gla.ac.uk)
Gaseous3
  • Vapochromic behaviour of porous crystals is beneficial for facile and rapid detection of gaseous molecules without electricity. (nature.com)
  • Especially in the former case, colour change occurs as a result of the changes in the electronic state: The ground and excited states of the vapochromic molecules experience energetic stabilization by the dipole-dipole interaction with the gaseous molecules, leading to widening/narrowing of the energy gap 8 . (nature.com)
  • Active surface groups on carbon blacks have been shown to adsorb and retain gaseous adsorbate molecules selectively [ 859 , 860 ]. (nanomedicine.com)
Ions2
  • The efficacy of adsorption was quantitative for metal ions present in a real sample of wastewater and the efficiency didn't drop even after 7 cycles of use. (biomedcentral.com)
  • Adsorption also refers to the phenomenon of a substance (mainly solids) absorbing molecules or ions from the surrounding medium (liquid or gas) on its surface. (activatedcarbon.net)
Langmuir1
Particles3
  • Adsorption, ion exchange and chromatography are sorption processes in which certain adsorbates are selectively transferred from the fluid phase to the surface of insoluble, rigid particles suspended in a vessel or packed in a column. (wikipedia.org)
  • Histone adsorption on the surface of carbon particles significantly stimulates their ingestion by rat peritoneal macrophages, hamster kidney fibroblasts, and mouse L-cells [ 861 ], and the adsorption of polycyclic aromatic hydrocarbons (PAHs) and their nonpolar metabolites on the surface of carbon particles ingested by rat alveolar macrophages has been studied [ 862 ]. (nanomedicine.com)
  • Activated carbon adsorption is the process of removal from a liquid or gas by the adhesion of contaminants or impurities to the surface of activated carbon particles. (activatedcarbon.net)
Absorption9
  • In principle, peak positions of the absorption and fluorescence spectra are in a linear relationship with the permittivity of the medium molecules, as theoretically derived by Lippert and Mataga 9 . (nature.com)
  • Adsorption is the term for this process (please don't confuse it with absorption). (awesomewaterfilters.com.au)
  • A typical sorbent does its job by 'adsorption' or 'absorption' or both. (coirabsorbent.com)
  • Coco Peat does the job by the process of adsorption as well as absorption. (coirabsorbent.com)
  • What's the Difference Between Absorption and Adsorption? (softsecrets.com)
  • Adsorption is only one letter different than absorption, and it's an entirely different physical/chemical process. (softsecrets.com)
  • Adsorption is different from absorption because molecules that are being absorbed rather than adsorbed are taken inside the material. (softsecrets.com)
  • The defects present in a graphene sheet provide cavities that can improve the absorption efficiency of molecules to the surface, allowing them to be detected. (ctimaterials.com)
  • Near-edge absorption fine structure in x-ray absorption spectroscopy (NEXAFS) yields the adsorption geometry and, together with x-ray photoelectron spectroscopy (XPS), gives information about the electronic properties. (fu-berlin.de)
Adsorb2
  • These four assumptions are seldom all true: there are always imperfections on the surface, adsorbed molecules are not necessarily inert, and the mechanism is clearly not the same for the very first molecules to adsorb to a surface as for the last. (wikipedia.org)
  • The variations on this basic structure are virtually limitless and can be customized so that a MOF's pores adsorb specific gas molecules, making MOFs potentially ideal gas storage vessels. (phys.org)
Physical adsorption3
  • How does physical adsorption of mixed gas occur on solid? (stackexchange.com)
  • Physical adsorption is usually a reversible process in which the substance does not change its original properties during the adsorption process, so the adsorption energy is small and the adsorbed material can easily be detached again, e.g. by adsorbing a gas on activated carbon, the adsorbed gas can be expelled from the surface of the activated carbon by increasing the temperature. (activatedcarbon.net)
  • This type of adsorption is usually more specific and irreversible than physical adsorption and it often involves stronger forces such as covalent bonding, hydrogen bonding or electrostatic interactions. (activatedcarbon.net)
Processes7
  • Surface adsorbates represent a unique arena in which fundamental processes can be observed at an atomic level. (cam.ac.uk)
  • The process of adsorption can take place in many physical, natural, chemical and biological systems and is typically used in various industrial applications like the production of synthetic resins, activated charcoal and confining or utilizing waste heat to generate cold water to be used in air conditioning and other similar processes. (corrosionpedia.com)
  • Download for offline reading, highlight, bookmark or take notes while you read Adsorption Processes for Water Treatment and Purification. (westflo.org)
  • Adsorption Processes for Water Treatment and Purification: Bonilla-Petriciolet, Adrián, Mendoza-Castillo, Didilia Ileana, Reynel-Ávila, Hilda Elizabeth: 9783319581354: Books - Amazon.ca The analysis is structured in a way that allows reviewing and discussing the main stages of process development. (westflo.org)
  • Adsorption processes with porous materials (e.g. (westflo.org)
  • Summary Adsorption processes have played a central role in water treatment for many years but their importance is on the rise with the continuous discoveries of new micropollutants in the water cycle (pharmaceuticals for example). (westflo.org)
  • such as contact time, adsorption dosage, pH of the solution, temperature and initial Adsorption Processes for Water Treatment and Purification - Kindle edition by Bonilla-Petriciolet, Adrián, Mendoza-Castillo, Didilia Ileana, Reynel-Ávila, Hilda Elizabeth. (westflo.org)
Single molecule2
  • A pyrene-like ring of the nanotube is chosen as an adsorption site in the high layer of the ONIOM calculations for the adsorption of a single molecule. (teen-hot.com)
  • Graphene (as a single molecule or a composite) is currently used in various sensing environments nowadays as biosensors, optical sensors, temperature and humidity sensors, piezoelectric and piezoresistive sensors, capacitance sensors and gas sensors. (ctimaterials.com)
Selectively1
  • By comparing the porewater with pond water DOM, we found that the carboxyl-rich alicyclic molecules (CRAM) were selectively preserved, carbohydrates and aliphatics/proteins were preferentially consumed, and low O/C-ratio compounds with high bioproduction index (I_bioprod) and terrestrial index (I_terr) were produced. (bvsalud.org)
Occurs4
  • Adsorption only occurs on localized sites on the surface, not with other adsorbates. (wikipedia.org)
  • The aggregates are arranged in orderly superlattice structures, which is in stark contrast to the prevailing view that the adsorption of gas molecules by MOFs occurs stochastically. (phys.org)
  • During the process of adsorption, charge transfer occurs between the adsorbate and the metal, which in turn results in a dipole moment. (corrosionpedia.com)
  • Adsorption of activated carbon occurs in two main ways. (activatedcarbon.net)
Wastewater1
Graphene15
  • The effect of structural defects on graphene interaction with other molecules is of high interest. (civilica.com)
  • In this study, the interaction of ethylene molecules with pristine graphene (PG) and defective graphenes including single (SVG) and double (DVG) vacancies, were investigated using dispersion-corrected periodic density functional theory (DFT). (civilica.com)
  • It was found that there is a critical distance from the graphene surface, where the nature of adsorption of adsorbate molecule changes from physisorption to the possible chemisorption depending on the energetical costly distortion induced in adsorbate molecule. (civilica.com)
  • In the case of ethylene adsorption on the graphene structures studied here, the mentioned critical distances follow the order SVG (civilica.com)
  • Moreover, all possible orientations for ethylene adsorption on graphene structures were considered and energetically compared. (civilica.com)
  • There are many ways in which graphene can detect molecules, making it an ideal choice as a material for use in sensors. (ctimaterials.com)
  • Because graphene has excellent conductive, thermal and adsorption properties as well as a large specific surface area. (ctimaterials.com)
  • For sensor applications, the structure of graphene provides a unique surface for the adsorption of molecules. (ctimaterials.com)
  • The adsorption of molecules onto the surface can also trigger a change in the electrical conductivity of graphene. (ctimaterials.com)
  • The voltage change with graphene, provides a measurable response which indicates that a molecule has been detected. (ctimaterials.com)
  • In addition to adsorbing into the cavities on the graphene surface, molecules can also interact with the π-bonds. (ctimaterials.com)
  • Moreover, graphene can be used as an adsorption template for studying reactions between adsorbates and gas phase molecules. (lu.se)
  • We show that graphene acts as a catalyst for water formation by providing the required adsorption configuration that promotes the reaction. (lu.se)
  • This finding paves the way for future research using graphene as an adsorption template for fundamental catalysis studies. (lu.se)
  • Graphene is also an ideal model system for studying more fundamental aspects of undercover reactions, such as the coexistence of different molecules undercover or their intercalation kinetics. (lu.se)
Chemisorption2
  • The exact nature of the bonding depends on the details of the species involved, but the adsorption process is generally classified as physisorption (characteristic of weak van der Waals forces) or chemisorption (characteristic of covalent bonding). (wikipedia.org)
  • Both adsorption and deformation energies were calculated to examine the possibility of ethylene chemisorption. (civilica.com)
Adsorbents1
Electrostatic attraction1
  • The precise nature of this bonding depends on the involved species, but the process of adsorption in general is categorized under covalent bonding or may be brought about by electrostatic attraction. (corrosionpedia.com)
Process8
  • Adsorption is present in many natural, physical, biological and chemical systems and is widely used in industrial applications such as heterogeneous catalysts, activated charcoal, capturing and using waste heat to provide cold water for air conditioning and other process requirements (adsorption chillers), synthetic resins, increasing storage capacity of carbide-derived carbons and water purification. (wikipedia.org)
  • A technique called "gas adsorption crystallography" that provides a new way to study the process by which metal-organic frameworks (MOFs) store immense volumes of gases such a carbon dioxide, hydrogen and methane. (phys.org)
  • An international collaboration of scientists led by Omar Yaghi, a renowned chemist with the Lawrence Berkeley National Laboratory (Berkeley Lab), has developed a technique they dubbed "gas adsorption crystallography" that provides a new way to study the process by which metal-organic frameworks (MOFs) - 3D crystals with extraordinarily large internal surface areas - are able to store immense volumes of gases such a carbon dioxide, hydrogen and methane. (phys.org)
  • Adsorbate and the process of adsorption are also beneficial in the pharmaceutical industry as it helps extend the neurological exposure of various drugs. (corrosionpedia.com)
  • Based on the values of entropy changes (ΔS) (50.04 J/mol k), the enthalpy changes (ΔH) (9.26 kJ/mol), and the negative Gibbs free energy changes (ΔG), the adsorption process was endothermic, random, and spontaneous. (researchsquare.com)
  • Therefore, the adsorption process intensification is fundamental to face. (westflo.org)
  • Adsorption is the process in which the liquid molecules first diffuse and adhere to the surface of the sorbent material. (coirabsorbent.com)
  • B) Adsorption is a exothermic process? (ncertmcq.com)
Interact3
  • The surface is energetically homogeneous, and adsorbed molecules do not interact. (wikipedia.org)
  • Engineering the pore environment of COFs with chemical moieties that interact with CO 2 have increased the CO 2 adsorption performance. (frontiersin.org)
  • Shown here are the three gas regimes in MOFs: (A) gas adsorbates interact with pore walls (green arrows) (B) gas adsorbates interact with each other within a pore (blue arrows) (C) gas molecules interact with each other across pore walls (red arrows). (phys.org)
Gases2
  • The installation of CO 2 binding moieties in the COF has made possible the selective adsorption of CO 2 over other gases such as N 2 . (frontiersin.org)
  • A semi‒pilot-scale adsorption reactor was fabricated to remove a volatile organic compound (VOC) gases mixture (BTEX). (aaqr.org)
Energies4
  • Trends in adsorption energies as a function of transition metal differ for adsorbates that are attached atop a surface atom or are adsorbed onto a high coordination site. (tue.nl)
  • When adsorption onto early and late transition metals is compared variation in relative bond energies of adsorbates attached to different sites is large. (tue.nl)
  • When adsorbed atop, trends in bond energies are remarkably similar to those of the corresponding molecules. (tue.nl)
  • For slightly reduced surfaces, many adsorption configurations with comparable adsorption energies exist and polarons reside in the subsurface layer. (univie.ac.at)
Compounds2
  • However, it is necessary to functionalize the surfaces of these resonators to enhance the adsorption and discrimination of volatile organic compounds. (researchgate.net)
  • Activated carbon adsorption has a wide range of applications as it is effective in removing a variety of contaminants such as organic compounds, chlorine, heavy metals and odours. (activatedcarbon.net)
Hydrogen2
  • Chemical bonds that underpin their porous frameworks, that is, coordination bonds, dynamic covalent bonds, and hydrogen bonds, are commonly affected by the water molecules. (nature.com)
  • Using hydrogen adsorbates, we analyze the stability of different H- structures under mbar pressures of oxygen. (lu.se)
Surfaces5
  • Currently, we are also engaged in adsorption studies on the surfaces of nanoporous thin MgO films. (pnnl.gov)
  • This result shows that the exploitation of intramolecular reactions on surfaces is a viable path to obtaining new molecules with suitable magnetic properties for their use in spintronics. (fu-berlin.de)
  • Adsorption is a surface phenomenon that involves the retention of molecules on surfaces and has been a subject of discussion for decades. (ifpenergiesnouvelles.fr)
  • The Quantum Materials Modelling group (C. Franchini) in collaboration with the experimental surface science group at TU Wien (U. Diebold) have shown that quantum effects play a decisive role in the adsorption of molecule on surfaces. (univie.ac.at)
  • At strongly reduced surfaces, two adsorption configurations dominate: either inside an oxygen vacancy, or at surface Ti 5 c sites, coupled with a surface polaron. (univie.ac.at)
Organic3
  • COF materials are synthesized by the covalent linkage of organic molecules bonded in a repeating fashion to form a porous crystal that is ideal for gas adsorption and storage. (frontiersin.org)
  • The paper is titled "Extra adsorption and adsorbate superlattice formation in metal-organic frameworks . (phys.org)
  • A typical MOF consists of a metal oxide center surrounded by organic molecules that form a highly porous three-dimensional crystal framework. (phys.org)
Substance1
Pores5
  • yellow molecules are adsorbed in the center of the pores. (phys.org)
  • One gram of MOF has a surface area of up to 10,000 square meters onto which it is possible to compact gas molecules into MOF pores like so many bees on a honeycomb without the high pressures and low temperatures usually required for compressed gas storage," Yaghi says. (phys.org)
  • While the interactions of gas molecules with the internal surface of a MOF and among themselves within individual pores have been extensively studied, the gas-gas interactions across a MOF's pore walls have not been explored until now. (phys.org)
  • With their SAXS-based gas adsorption crystallography technique, Yaghi, Terasaki and their collaborators discovered that local strain in the MOF induced by pore-filling can give rise to collective and long-range gas-gas interactions, resulting in the formation of superlattices that extend over several pores. (phys.org)
  • As liquid or air comes into contact with active charcoal, intermolecular forces draw molecules into the millions of pores dotting the carbon surface. (softsecrets.com)
Rutile2
  • A variety of OH containing molecules in their different modes of adsorption onto the rutile TiO2(110) are studied by means of density functional theory. (nist.gov)
  • Using a combination of first-principles calculations, scanning tunneling microscopy, and atomic force microscopy, we analyze the interaction of polarons with CO molecules adsorbed on the reduced rutile TiO 2 ( 110 ) surface. (univie.ac.at)
Uptake2
  • VPC-1 exhibits reversible colour changes upon uptake/release of water molecules due to the charge transfer character of the constituent dendrimer. (nature.com)
  • The selectivity and uptake capacity of a MOF are determined by the nature of the gas molecule being adsorbed and its interactions with the MOF's constituents. (phys.org)
Efficiency2
  • Testing the suggested technique with groundwater resulted in an 82% CR adsorption efficiency. (iwaponline.com)
  • The porous architecture allows adsorption of guest molecules with high efficiency, which is advantageous for rapid detection of the guest molecules. (nature.com)
Temperature3
  • Spin-crossover molecules are a particular class of molecules that change their magnetic moment as a function of temperature or by illumination with light. (fu-berlin.de)
  • The figure shows the fraction of molecules in the high-spin state as a function of temperature for different coverages (in monolayers, ML) of [Fe(H 2 B(pz) 2 ) 2 (bipy)] on HOPG (bulk data are from Moliner et al. ). (fu-berlin.de)
  • The influence of sub-monolayers of Au on the UV/visible photoreaction of benzoic acid was explored at room temperature, with adsorbate depletion taken as a measure of activity. (edu.sa)
Concentration2
  • An inconsistency due to the lack of consideration of equilibrium concentration of free adsorption sites in the formulation of the expression for the association constant has been pointed out. (sciendo.com)
  • Deem and Ali (1968) studied the effect of the radioactivity of tracers in porous media with the conclusion that preferential adsorption is observed for tracers of similar properties which is due to mineralogy, surface activeness, and concentration. (ifpenergiesnouvelles.fr)
Depends3
  • BET surface area depends on size and number of gas molecules adsorbed. (stackexchange.com)
  • That mean that the measured surface area depends on the size of the adsorbate molecule . (stackexchange.com)
  • As a result, CO adsorption depends on the reduction state of the sample. (univie.ac.at)
Polymers1
  • This has drawn a remarkable number of publications from the industry and academia in the last decade, with many review articles focused on adsorption of polymers, surfactants, gas, and nanoparticles in porous media with main applications in Enhanced Oil Recovery (EOR). (ifpenergiesnouvelles.fr)
Interaction1
  • These calculations had suggested that the interaction radius of an adsorbate molecule would be reduced during adsorption in a micropore. (gla.ac.uk)
Attract1
  • Adsorption is the quality of a solid compound to attract and trap gas, liquid, or dissolved solid molecules to its surface. (softsecrets.com)
Sensitivity1
  • This can lead to a greater number of potential adsorption sites which increases the sensitivity of the material. (ctimaterials.com)
TiO21
  • Enhanced adsorption energy of Au1 and O2 on the stoichiometric TiO2(110) surface by coadsorption with other molecules. (edu.sa)
Gibbs1
  • Binding energy, Gibbs free energy change, density of states, and Mulliken charge transfer are computed to analyze the nature of the binding between GaPNT and the adsorbate molecule. (teen-hot.com)
Equilibrium1
Transition metals1
  • For the early transition metals a breaking of this rule is found for C and CH or N and NH when adsorbed atop a transition metal surface or when they are part of a transition metal molecule. (tue.nl)
Species2
  • The nature of the adsorption can affect the structure of the adsorbed species. (wikipedia.org)
  • The different species were analyzed with respect to the adsorption energy, work function, and atomic Bader charges. (nist.gov)
Surface tension2
Pharmaceutical1
  • Pharmaceutical industry applications, which use adsorption as a means to prolong neurological exposure to specific drugs or parts thereof,[citation needed] are lesser known. (wikipedia.org)
Results3
  • Our results show that dissociated adsorption is favored in all cases. (nist.gov)
  • This on-surface ring-closure reaction, although occurring at the periphery of the molecule, results in a significant change of the magnetic properties of the central metal ion, as seen from the x-ray magnetic circular dichroism ( XMCD ) spectra in the figure. (fu-berlin.de)
  • STM results show that benzoic acid adsorption displaces a large fraction of Au clusters from the terraces toward their edges. (edu.sa)
Kinetic1
Water5
  • A traditional choice for this purpose is the cobalt(II) complexes that display visible colour change due to the coordination of the water molecules to the cobalt(II) centre. (nature.com)
  • Water treatment alternatives such as adsorption using agricultural residues are currently being studied to eliminate pollutants that cause eutrophication in water bodies, avoiding the alteration of aquatic ecosystems. (mdpi.com)
  • This and other outstanding activated carbon features make it an effective adsorption medium for removing pollutants from water. (awesomewaterfilters.com.au)
  • 6 Removal of Antibiotics from Water by Adsorption/Biosorption This recently introduced group is produced with incorporation of appropriately identified transition metal/metals into the naturally available magnetite with simple synthesis method. (westflo.org)
  • The unraveling of the exact nature of the p-doping adsorbates is a key step for further development of AuCl3 functionalized CNTs in water sensor applications. (edu.sa)
Site4
  • It is based on four assumptions: All of the adsorption sites are equivalent, and each site can only accommodate one molecule. (wikipedia.org)
  • If an activated carbon filter is kept in place for too long, it may release certain contaminants in favour of others highly attracted to the adsorption site. (awesomewaterfilters.com.au)
  • The mechanism of adsorption does not involve the explicit "site" on a grain surface at which a particle can attach but an area phenomenon that covers the entire pore space in time and space. (ifpenergiesnouvelles.fr)
  • Effects of a CO molecule adsorbed at NNN−Ti5c site on polaronic states at low reduction level (5.6%, i.e., one VO in a 9×2 two-dimensional unit cell). (univie.ac.at)