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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

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Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
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Dialysis01:15

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Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
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Osmosis and Osmotic Pressure of Solutions02:40

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A number of natural and synthetic materials exhibit selective permeation, meaning that only molecules or ions of a certain size, shape, polarity, charge, and so forth, are capable of passing through (permeating) the material. Biological cell membranes provide elegant examples of selective permeation in nature, while dialysis tubing used to remove metabolic wastes from blood is a more simplistic technological example. Regardless of how they may be fabricated, these materials are generally...
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What are Membranes?01:54

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A key characteristic of life is the ability to separate the external environment from the internal space. To do this, cells have evolved semi-permeable membranes that regulate the passage of biological molecules. Additionally, the cell membrane defines a cell’s shape and interactions with the external environment. Eukaryotic cell membranes also serve to compartmentalize the internal space into organelles, including the endomembrane structures of the nucleus, endoplasmic reticulum and...
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Detergent Purification of Membrane Proteins01:18

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Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
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Ion Exchange01:17

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Updated: Aug 8, 2025

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination
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GO-Based Membranes for Desalination.

Rui Ge1, Teng Huo1, Zhongyong Gao1

  • 1Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China.

Membranes
|February 25, 2023
PubMed
Summary
This summary is machine-generated.

Graphene oxide membranes (GOMs) show promise for water treatment and desalination. This review explores methods to improve their structure and performance, addressing key challenges for industrial use.

Keywords:
desalinationgraphene oxideinterlayer spacinglongitudinal mass transfer pathwayswrinkles

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Graphene oxide (GO) possesses unique properties for membrane separations, particularly in water treatment.
  • GO-based membranes (GOMs) are extensively studied for desalination technologies like pervaporation and nanofiltration.

Purpose of the Study:

  • To review challenges and recent advancements in GOMs for desalination.
  • To explore methods for precise control over mass transfer pathways in GOMs.
  • To elucidate the structure-performance relationship for high-performance GOMs.

Main Methods:

  • Summarizing preparation methods for GOMs.
  • Analyzing techniques for regulating mass transfer pathways (e.g., GO reduction, cross-linking, intercalation).
  • Reviewing desalination performance and mass transport mechanisms.

Main Results:

  • GOMs offer unimpeded water permeation, beneficial for water treatment.
  • Challenges remain in large-area fabrication, precise pathway construction, and stability for industrial desalination.
  • Various methods exist to tune GOM microstructure and enhance desalination performance.

Conclusions:

  • Precise regulation of GOM microstructure is key to improving desalination performance.
  • Addressing fabrication and stability challenges is crucial for industrial application.
  • Future development of GOMs hinges on structural design and understanding transport mechanisms.