"The Langmuir adsorption model explains adsorption by assuming an adsorbate behaves as an ideal gas at isothermal conditions."
A model that describes the adsorption of molecules on a surface as a monolayer.
Surface chemistry: Surface chemistry is the study of chemical reactions that occur at the interface of two phases, typically a gas-solid or liquid-solid interface.
Langmuir adsorption isotherm: The Langmuir adsorption isotherm is a mathematical model that describes the adsorption of molecules onto a surface in a monolayer.
Monolayer adsorption: Monolayer adsorption is the process of molecules adsorbing onto a surface up to a single layer thickness.
Multilayer adsorption: Multilayer adsorption is the process of molecules adsorbing onto a surface forming multiple layers.
Surface area and porosity: Surface area and porosity are important characteristics of a surface that affect adsorption properties.
Adsorption kinetics: Adsorption kinetics is the study of the rate at which molecules adsorb and desorb from a surface.
Surface energy: Surface energy is the energy required to increase the surface area of a substance.
Surface tension: Surface tension is the force that holds the surface of a liquid together.
Contact angle: Contact angle is the angle between the solid surface and a liquid droplet on its surface.
Gibbs free energy: Gibbs free energy is the energy available to be used for chemical work in a system at constant temperature and pressure.
Langmuir-Hinshelwood mechanism: The Langmuir-Hinshelwood mechanism is a widely used model to describe homogeneous catalysis and heterogeneous catalysis on surfaces.
Surface coverage: Surface coverage is the fraction of the surface that is covered by adsorbates.
Isothermal calorimetry: Isothermal calorimetry is a technique used to measure heat changes associated with chemical reactions.
Surface complexation modeling: Surface complexation modeling is the use of mathematical models to describe the behavior of surfaces in solution.
Surface-enhanced Raman spectroscopy: Surface-enhanced Raman spectroscopy is a technique used to enhance the Raman signal of molecules adsorbed on a surface.
Langmuir-Blodgett films: Langmuir-Blodgett films are artificially fabricated monolayers that can be used in surface chemistry studies.
Molecular dynamics simulations: Molecular dynamics simulations are computer simulations that simulate the motion of molecules in a system.
Electron microscopy: Electron microscopy is a technique used to image surfaces at high resolution.
X-ray photoelectron spectroscopy: X-ray photoelectron spectroscopy is a technique used to study the chemical composition of surfaces.
Scanning tunneling microscopy: Scanning tunneling microscopy is a technique used to study surfaces at the atomic level.
Langmuir-Freundlich model: The Langmuir-Freundlich model is an expansion of the Langmuir adsorption model that incorporates heterogeneity and multilayer adsorption, allowing for a more accurate description of adsorption processes.
Extended Langmuir model: The Extended Langmuir model is an improved version of the Langmuir adsorption model that accounts for factors such as lateral interactions, site heterogeneity, and multilayer adsorption on surfaces.
BET model (Brunauer–Emmett–Teller): The BET model is a physical adsorption model that describes the multilayer adsorption of gas molecules onto a solid surface, taking into account the interaction between gas molecules and their lateral interaction on the surface.
Modified Langmuir model: The Modified Langmuir model is a variation of the Langmuir adsorption model which includes additional parameters to account for deviations from ideal adsorption behavior.
Dual-site Langmuir model: The Dual-site Langmuir model is an extension of the Langmuir adsorption model that accounts for the presence of two different types of adsorption sites on a surface.
Heterogeneous surface Langmuir model: The heterogeneous surface Langmuir model describes the adsorption of different types of molecules onto a surface with varying adsorption energies and densities.
Multilayer adsorption Langmuir model.: The topic of Multilayer adsorption Langmuir model in Chemistry involves the description of the adsorption of multiple layers of molecules onto a solid surface using Langmuir’s model.
"According to the model, adsorption and desorption are reversible processes."
"The adsorbate's partial pressure, pA, is related to the volume of it, V, adsorbed onto a solid adsorbent."
"The adsorbent is assumed to be an ideal solid surface composed of a series of distinct sites capable of binding the adsorbate."
"The adsorbate binding is treated as a chemical reaction between the adsorbate gaseous molecule Ag and an empty sorption site S."
"This reaction yields an adsorbed species Aad."
"This adsorbed species has an associated equilibrium constant Keq."
"From these basic hypotheses the mathematical formulation of the Langmuir adsorption isotherm can be derived in various independent and complementary ways."
"The kinetics, the thermodynamics, and the statistical mechanics approaches can be used to derive the Langmuir adsorption isotherm."
"The Langmuir adsorption equation is: θA = V/Vm = (Keq^A pA) / (1 + Keq^A pA)."
"θA is the fractional occupancy of the adsorption sites, i.e., the ratio of V, the volume of gas adsorbed onto the solid, to Vm, the volume of a gas molecules monolayer covering the whole surface of the solid and completely occupied by the adsorbate."
"A continuous monolayer of adsorbate molecules covering a homogeneous flat solid surface is the conceptual basis for this adsorption model." Quotes: - "The Langmuir adsorption model explains adsorption by assuming an adsorbate behaves as an ideal gas at isothermal conditions." - "According to the model, adsorption and desorption are reversible processes." - "The adsorbate's partial pressure, pA, is related to the volume of it, V, adsorbed onto a solid adsorbent." - "The adsorbent is assumed to be an ideal solid surface composed of a series of distinct sites capable of binding the adsorbate." - "The adsorbate binding is treated as a chemical reaction between the adsorbate gaseous molecule Ag and an empty sorption site S." - "This reaction yields an adsorbed species Aad." - "This adsorbed species has an associated equilibrium constant Keq." - "From these basic hypotheses, the mathematical formulation of the Langmuir adsorption isotherm can be derived in various independent and complementary ways." - "The Langmuir adsorption equation is: θA = V/Vm = (Keq^A pA) / (1 + Keq^A pA)." - "θA is the fractional occupancy of the adsorption sites, i.e., the ratio of V, the volume of gas adsorbed onto the solid, to Vm, the volume of a gas molecules monolayer covering the whole surface of the solid and completely occupied by the adsorbate." - "A continuous monolayer of adsorbate molecules covering a homogeneous flat solid surface is the conceptual basis for this adsorption model."