在二维碳基膜中通过孔隙控制海水淡化机制进行表面/接口运输
Xiaoyang Zhao1, Kun Meng1, Yutao Niu1
1Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China. mkkmust@163.com.
Physical chemistry chemical physics : PCCP
|November 6, 2023
概括
一种新的碳材料Carzeo-ANG,其孔径大于格斯特罗姆,为淡水短缺提供了一个有前途的解决方案. 这种先进的膜表现出高的海水淡化效率和自我清洁能力,解决了关键的全球水资源挑战.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 淡水短缺是一个紧迫的全球问题,推动了对高效海水淡化技术的需求.
- 反透 (RO) 淡化是有前途的,特别是在格斯大小的孔膜.
- 开发具有最佳运输性质的稳定大小孔仍然是一个重大挑战.
研究的目的:
- 构建和评估一种新型的二维 (2D) 焦石样碳结构 (Carzeo-ANG) 用于海水淡化.
- 研究Carzeo-ANG膜的表面/接口传输行为和透效应.
- 评估海水淡化性能,包括离子排放和水流量.
主要方法:
- 使用密度函数理论 (DFT) 计算和经典分子动力学模拟.
- 使用维也纳初始模拟包 (VASP) 进行第一原则计算.
- 分析了孔隙结构,离子吸附,质量转移和自由能量障碍.
主要成果:
- 卡泽奥-ANG具有稳定的安格斯特罗姆大小的孔隙 (有效直径5.4 Å) 在石样碳框架内.
- 膜显示出出色的盐离子吸附和质量转移活性.
- 实现了100%的Cl-和96.25%的Na+排斥,在80MPa时的水流量为132.71 L cm-2天-1 MPa-1.
- 由于其相互连接的电子结构,该材料表现出自我清洁效应.
结论:
- 卡泽奥-ANG为反透淡化提供了一个高效和稳定的膜.
- 独特的孔隙结构和材料特性有助于卓越的海水淡化性能.
- 自清洗特性为长期的膜稳定性和效率提供了额外的优势.
相关概念视频
Facilitated Transport
127.2K
The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
127.2K
Facilitated Diffusion
484
The plasma membrane, a critical structure in cellular biology, houses an array of transporters, or carrier proteins, interspersed within its lipid bilayer. These proteins play a crucial role in solute transport through facilitated diffusion, a form of passive diffusion that uses transporters to move the molecules across the membrane.
In this process, substrates such as organic compounds and ions interact with a transporter on one side, triggering conformational changes in proteins that enable...
In this process, substrates such as organic compounds and ions interact with a transporter on one side, triggering conformational changes in proteins that enable...
484
The Significance of Membrane Transport
27.2K
The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
27.2K
Transcellular Transport of Solutes
3.6K
Transcellular transport of solutes is the movement of substances like monosaccharides and amino acids through polarized cells. This transport mechanism is primarily seen in epithelial and endothelial cells aided by membrane transport proteins such as channels and transporters. The tight junctions between these cells confine the membrane proteins to the two sides of the cell. The epithelial cells have distinct apical and basolateral domains. In contrast, the endothelial cells show the luminal...
3.6K
Cellular Membranes and Drug Transport
598
Drugs must traverse multiple biological barriers, such as multi-layered skin, single-layered intestinal epithelium, and the plasma membrane, to reach their target sites within the body. The plasma membrane, a highly structured composite of phospholipids, carbohydrates, and proteins, is the cell's protective boundary, facilitating selective substance exchange.
Phospholipids arrange themselves into a bilayer, with hydrophilic heads oriented outward and hydrophobic tails facing inward.
Phospholipids arrange themselves into a bilayer, with hydrophilic heads oriented outward and hydrophobic tails facing inward.
598
Fluid Movement Between Compartments
535
The force applied by fluids against a surface, known as hydrostatic pressure, initiates the transfer of fluid among different compartments. Within our blood vessels, the blood's hydrostatic pressure is a result of the heart's pumping action. At the arteriolar end of capillaries, hydrostatic pressure (capillary blood pressure) exceeds the opposing colloid osmotic pressure created primarily by plasma proteins like albumin. This discrepancy in pressure propels plasma and nutrients from the...
535


