Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Adsorption of Gases on Solids01:28

Adsorption of Gases on Solids

240
Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...
240
Adsorption Isotherms I01:29

Adsorption Isotherms I

188
Adsorption isotherms are mathematical models that describe how molecules in a gas or liquid phase interact with surfaces. Two of the most common isotherm models are the Langmuir and Freundlich isotherms, which relate to Type I monolayer chemisorption. The Langmuir model is based on four key assumptions:• Adsorption cannot exceed monolayer coverage.• All surface sites are equivalent.• Molecules adsorb only at vacant sites.• There are no interactions between adsorbed...
188
Adsorption Isotherms II01:25

Adsorption Isotherms II

121
Brunauer, Emmett, and Teller (BET) introduced a theory in 1938 that modified Langmuir's assumptions to explain multilayer physical adsorption. This theory is applicable to Type II isotherms and provides a more realistic picture of adsorption processes. The BET theory assumes a uniform solid surface with localized adsorption sites, where adsorption at one site doesn't affect adsorption at neighboring sites. This theory also allows for the possibility of additional molecules being adsorbed on top...
121
Analyte Adsorption and Distribution01:09

Analyte Adsorption and Distribution

3.3K
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
3.3K
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

128
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
128
Colloidal precipitates01:09

Colloidal precipitates

6.9K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
6.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Discrepancies between fall risk and fall awareness in hospitalized elderly patients with cataracts: a cross-sectional study.

Frontiers in medicine·2026
Same author

A biomimetic strip for standardized evaluation of herbicide deposition dynamics.

Materials horizons·2026
Same author

Physics-initialized self-supervised spatio-frequency fusion for polarimetric single-pixel imaging through scattering media.

Optics express·2026
Same author

Thermoneutrality Reveals True Cardiac Adaptations to Exercise, Disease, and Aging in Male Mice.

Acta physiologica (Oxford, England)·2026
Same author

Efferocytosis in heart failure: Mechanisms, dysregulation and therapeutic potential.

Theranostics·2026
Same author

Effects of herbaceous root development on soil water infiltration and hydraulic properties in loess.

Scientific reports·2026
Same journal

Host-guest engineering in a two-dimensional anionic porphyrinic metal-organic framework via cationic bodipy encapsulation for boosting photocatalytic Hâ‚‚ evolution.

Journal of colloid and interface science·2026
Same journal

Nanoflower-like covalent organic framework/indium sulfide step scheme heterojunction for selective electrochemical uranium extraction.

Journal of colloid and interface science·2026
Same journal

Dual-site synergy via interfacial engineering for enhanced CO<sub>2</sub> electroreduction to methanol.

Journal of colloid and interface science·2026
Same journal

Chirality-controlled seeded supramolecular polymerization: From glutamide amphiphiles to ultralong helical nanotubes.

Journal of colloid and interface science·2026
Same journal

Seawater desalination and autogenous salinity gradient for full-day electricity generation via an electrochemical system fabricated by all biomass-based materials.

Journal of colloid and interface science·2026
Same journal

Phosphate-induced surface reconstruction of Li-rich layered cathodes with a spinel lithium phosphate interface.

Journal of colloid and interface science·2026
See all related articles

Related Experiment Video

Updated: Apr 15, 2026

Monitoring Protein Adsorption with Solid-state Nanopores
08:51

Monitoring Protein Adsorption with Solid-state Nanopores

Published on: December 2, 2011

14.2K

Cooperative adsorption on solid surfaces.

Shijie Liu1

  • 1Department of Paper and Bioprocess Engineering, State University of New York - College of Environmental Science and Forestry, Syracuse, NY 13210, United States.

Journal of Colloid and Interface Science
|April 1, 2015
PubMed
Summary
This summary is machine-generated.

Langmuir adsorption models are often insufficient for describing real-world adsorption processes. Apparent multilayer adsorption provides a more accurate model for non-ideal adsorption behaviors, including cooperative adsorption.

Keywords:
Adsorption isothermAdsorption kineticsCompetitive adsorptionCooperativityMultilayer adsorptionNonideal adsorption

More Related Videos

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
11:38

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework

Published on: February 1, 2020

17.2K
Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method
09:43

Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method

Published on: April 11, 2020

7.3K

Related Experiment Videos

Last Updated: Apr 15, 2026

Monitoring Protein Adsorption with Solid-state Nanopores
08:51

Monitoring Protein Adsorption with Solid-state Nanopores

Published on: December 2, 2011

14.2K
In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
11:38

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework

Published on: February 1, 2020

17.2K
Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method
09:43

Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method

Published on: April 11, 2020

7.3K

Area of Science:

  • Surface Science
  • Physical Chemistry
  • Chemical Engineering

Background:

  • Langmuir adsorption models are widely used for monolayer adsorption, assuming uniform adsorbent sites and non-interacting adsorbate molecules.
  • These ideal conditions are frequently not met in practical chemisorption and physisorption scenarios.
  • Deviations from Langmuir behavior necessitate more sophisticated models.

Purpose of the Study:

  • To evaluate the limitations of the Langmuir adsorption model.
  • To explore the utility of apparent multilayer adsorption as a descriptor for non-ideal adsorption.
  • To provide a framework for understanding deviations from ideal adsorption kinetics and isotherms.

Main Methods:

  • Analysis of adsorption isotherm and kinetic data.
  • Comparison of Langmuir model predictions with experimental observations.
  • Application of apparent multilayer adsorption models to non-ideal systems.

Main Results:

  • Langmuir adsorption models are inadequate for many chemisorption and physisorption cases.
  • Apparent multilayer adsorption effectively describes non-ideal adsorption, including cooperative effects.
  • Interactions between adsorbates and adsorbents cause deviations from ideal Langmuir behavior.

Conclusions:

  • Apparent multilayer adsorption is a valuable model for non-ideal adsorption phenomena.
  • Understanding deviations from ideal adsorption is crucial for accurate process modeling.
  • A generalized approach to adsorption kinetics and isotherms can explain diverse adsorption behaviors.