scholarly journals Low-resistance monovalent-selective cation exchange membranes prepared using molecular layer deposition for energy-efficient ion separations

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 2427-2436
Author(s):  
Eyal Merary Wormser ◽  
Oded Nir ◽  
Eran Edri
Keyword(s):  
Public Health ◽  
Cation Exchange ◽  
Brackish Water ◽  
Energy Efficient ◽  
Molecular Layer ◽  
Molecular Layer Deposition ◽  
Low Resistance ◽  
Layer Deposition ◽  
The World

The desalination of brackish water provides water to tens of millions of people around the world, but current technologies deplete much needed nutrients from the water, which is determinantal to both public health and agriculture.

Low-Resistance Monovalent-Selective Cation Exchange Membranes for Energy-Efficient Ion Separations

2020 ◽  
Author(s):  
Eyal Wormser ◽  
Oded Nir ◽  
Eran Edri
Keyword(s):  
Cation Exchange ◽  
Brackish Water ◽  
Molecular Layer ◽  
Water Desalination ◽  
Molecular Layer Deposition ◽  
Selective Layer ◽  
Trade Off ◽  
Membrane Selectivity ◽  
Layer Deposition ◽  
Water Energy Nexus

<div> <div> <div> <p>The desalination of brackish water provides water to tens of millions of people around the world, but current technologies deplete much needed nutrients from the water, which is detrimental to both public health and agriculture. A selective method for brackish water desalination, which retains the needed nutrients, is electrodialysis (ED) using monovalent-selective cation exchange membranes (MVS-CEMs). However, due to the trade-off between membrane selectivity and resistance, most MVS-CEMs demonstrate either high transport resistance or low selectivity, which increase energy consumption and hinder the use of such membranes for brackish water desalination by ED. Here, we used molecular layer deposition (MLD) to uniformly coat CEMs with ultrathin layers of alucone. The positive surface charge of the alucone instills monovalent selectivity in the CEM. Using MLD enabled us to precisely control and minimize the selective layer thickness, while the flexibility and nanoporosity of the alucone prevent cracking and delamination. Under conditions simulating brackish water desalination, this compound provides monovalent selectivity with negligible added resistance—the smallest reported resistance for a monovalent-selective layer, to date—thereby alleviating the selectivity–resistance trade-off. Addressing the water–energy nexus, we show that using these membranes in ED will cut at least half of the energy required for selective brackish water desalination with current MVS-CEMs. </p> </div> </div> </div>

Low-Resistance Monovalent-Selective Cation Exchange Membranes for Energy-Efficient Ion Separations

2020 ◽  
Author(s):  
Eyal Wormser ◽  
Oded Nir ◽  
Eran Edri
Keyword(s):  
Cation Exchange ◽  
Brackish Water ◽  
Molecular Layer ◽  
Water Desalination ◽  
Molecular Layer Deposition ◽  
Selective Layer ◽  
Trade Off ◽  
Membrane Selectivity ◽  
Layer Deposition ◽  
Water Energy Nexus

<div> <div> <div> <p>The desalination of brackish water provides water to tens of millions of people around the world, but current technologies deplete much needed nutrients from the water, which is detrimental to both public health and agriculture. A selective method for brackish water desalination, which retains the needed nutrients, is electrodialysis (ED) using monovalent-selective cation exchange membranes (MVS-CEMs). However, due to the trade-off between membrane selectivity and resistance, most MVS-CEMs demonstrate either high transport resistance or low selectivity, which increase energy consumption and hinder the use of such membranes for brackish water desalination by ED. Here, we used molecular layer deposition (MLD) to uniformly coat CEMs with ultrathin layers of alucone. The positive surface charge of the alucone instills monovalent selectivity in the CEM. Using MLD enabled us to precisely control and minimize the selective layer thickness, while the flexibility and nanoporosity of the alucone prevent cracking and delamination. Under conditions simulating brackish water desalination, this compound provides monovalent selectivity with negligible added resistance—the smallest reported resistance for a monovalent-selective layer, to date—thereby alleviating the selectivity–resistance trade-off. Addressing the water–energy nexus, we show that using these membranes in ED will cut at least half of the energy required for selective brackish water desalination with current MVS-CEMs. </p> </div> </div> </div>

Molecular layer deposition of polyurethane—Polymerisation at the very contact to native aluminium and copper

2017 ◽  
Vol 426 ◽  
pp. 133-147
Author(s):  
Frank Fug ◽  
Adrien Petry ◽  
Hendrik Jost ◽  
Aisha Ahmed ◽  
Mohammad Zamanzade ◽  
...  
Keyword(s):  
Molecular Layer ◽  
Molecular Layer Deposition ◽  
Layer Deposition

Multi-metal coordination polymers grown through hybrid molecular layer deposition

2021 ◽  
Author(s):  
Nathaniel E. Richey ◽  
Shirin Borhan ◽  
Stacey Bent
Keyword(s):  
Coordination Polymers ◽  
Molecular Layer ◽  
Functional Materials ◽  
Metal Coordination ◽  
Molecular Layer Deposition ◽  
Layer Deposition ◽  
Metal Coordination Polymers

Coordination polymers deposited by hybrid molecular layer deposition (MLD) techniques are of interest as highly conformal, functional materials. Addition of a second metal into these coordination polymers can result in...

scholarly journals About the importance of purge time in molecular layer deposition of alucone films

2021 ◽  
Author(s):  
Hardik Jain ◽  
Paul Poodt
Keyword(s):  
Ethylene Glycol ◽  
Molecular Layer ◽  
Molecular Layer Deposition ◽  
Layer Deposition

In MLD of alucone using trimethylaluminum (TMA) and ethylene glycol (EG), TMA is known to infiltrate into the MLD film taking very long to outgas. An insufficient purge can then lead to an additional CVD component in the overall growth.

Radical-triggered cross-linking for molecular layer deposition of SiAlCOH hybrid thin films

2021 ◽  
Author(s):  
Kristina Ashurbekova ◽  
Karina Ashurbekova ◽  
Iva Saric ◽  
Evgeny Modin ◽  
Mladen Petravic ◽  
...  
Keyword(s):  
Thin Film ◽  
Film Growth ◽  
Molecular Layer ◽  
Thin Film Growth ◽  
Cross Linking ◽  
Layer By Layer ◽  
Molecular Layer Deposition ◽  
Layer Deposition ◽  
Hybrid Thin Films ◽  
Enhanced Stability

We developed a thin film growth with a radical-initiated cross-linking of vinyl groups in a layer-by-layer manner via molecular layer deposition (MLD). The cross-linked film exhibited improved properties like 12% higher density and enhanced stability compared to the non-cross-linked film.

scholarly journals Utilizing Zirconium MOF‐functionalized Fiber Substrates Prepared by Molecular Layer Deposition for Toxic Gas Capture and Chemical Warfare Agent Degradation

2021 ◽  
pp. 2100001
Author(s):  
Agnieszka Gorzkowska‐Sobas ◽  
Kristian Blindheim Lausund ◽  
Martijn C. Koning ◽  
Veljko Petrovic ◽  
Sachin M. Chavan ◽  
...  
Keyword(s):  
Molecular Layer ◽  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Molecular Layer Deposition ◽  
Layer Deposition ◽  
Toxic Gas
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