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相关概念视频

Hydrogen Bonds01:04

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A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
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The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...
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The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
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相关实验视频

Updated: Jul 4, 2025

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination
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键解锁驱动的孔隙结构控制用于移动多元组件气体分离功能的控制.

Rong Yang1, Yu Wang1, Jian-Wei Cao1

  • 1Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Xi'an Key Laboratory of Functional Organic Porous Materials, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, PR China.

Nature communications
|January 27, 2024
PubMed
概括
此摘要是机器生成的。

在多孔协调网络中,精确的孔调节可以有效地从复杂气体混合物中分离乙烯 (C2H4). 这一进步有助于从具有挑战性的四级系统中生产高纯度乙烯.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.
  • 分离科学 分离科学

背景情况:

  • 从多组分混合物中净化乙烯 (C2H4) 是至关重要的,但具有挑战性.
  • 对于复杂的气体流,现有的分离方法往往缺乏效率.

研究的目的:

  • 开发一种用于选择性乙烯 (C2H4) 分离的新型多孔材料.
  • 为了证明精确的孔隙结构控制,以提高分离性能.

主要方法:

  • 合成相关的多孔协调网络与可调节的键.
  • 单晶X射线衍射用于结构分析.
  • 气体吸附等温,动力学和突破性实验.
  • 用于相互作用和扩散分析的计算模拟.

主要成果:

  • 调节键改变了孔隙形状和化学成分,改变了分离能力.
  • -fa-atz (2) 网络显示了增强的二氧化碳吸附和更快的扩散.
  • 从CO2/C2H2/C2H4/C2H6混合物中实现了乙烯 (C2H4) 的有效单步分离.
  • 这种材料在成型成颗粒时保持了多孔性和性能.

结论:

  • 协调网络中的精确孔隙工程为选择性气体分离提供了一个可行的策略.
  • 开发的材料显示出工业乙烯 (C2H4) 净化具有很高的潜力.
  • 该材料可加工成颗粒,提高了其实际适用性.