相关实验视频
Updated: Jan 28, 2026

08:43
Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
Published on: October 27, 2018
18.8K
通过与易斯酸溶盐的反应来合成纳米层MAX相和MXenes的元素替代方法
1Engineering Laboratory of Advanced Energy Materials , Ningbo Institute of Industrial Technology, Chinese Academy of Sciences , Ningbo , Zhejiang 315201 , China.
Journal of the American Chemical Society
|March 2, 2019
概括
研究人员开发了一种使用替代反应合成基于Zn的新型MAX相和Cl终结的MXenes的新方法. 这种方法为生产这些先进的纳米层材料提供了更绿色,无HF的途径.
科学领域:
- 材料科学
- 纳米技术
- 无机化学
背景情况:
- 纳米层材料,如MAX相和MXenes,具有独特的特性,对各种应用至关重要.
- 对于MAX阶段和MXenes的传统合成方法通常涉及高温和强化学物质,如酸 (HF).
研究的目的:
- 开发一种基于Zn的新型MAX相和完全由Cl结尾的MXenes的通用和高效的合成方法.
- 探索合成热力学不稳定的MAX相的新途径和MXene生产的绿色方法.
主要方法:
- 一种自上而下的合成策略,涉及MAX阶段前体和化 (ZnCl2) 之间的替代反应.
- 利用化ZnCl2替代MAX相前体 (Ti3AlC2,Ti2AlC,Ti2AlN,V2AlC) 形成基于Zn的新型MAX相.
- 随后对合成的基于Zn的MAX相进行脱皮,使用多余的ZnCl2来获得Cl终结的MXenes.
主要成果:
- 成功合成了四种新的基于Zn的MAX相:Ti3ZnC2,Ti2ZnC,Ti2ZnN和V2ZnC.
- 通过剥皮,首次分离出完全由Cl结尾的MXenes (Ti3C2Cl2,Ti2CCl2).
- 在剥皮过程中证明了化ZnCl2的易斯酸性.
结论:
- 开发的替代反应方法为合成新型MAX相提供了一种多功能途径,包括那些在高温下不稳定的热力学相.
- 这项研究提出了一种绿色,无HF的化学方法,用于制造完全由Cl结合的MXenes,克服传统方法的局限性.
更多相关视频
相关概念视频
Lewis Acids and Bases
48.3K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
48.3K
Lewis Acids and Bases
17.1K
This lesson delves into Lewis acids and bases in the context of the octet rule for electron-deficient compounds. Here, the concept is discussed, emphasizing the group 13 elements like boron or aluminium. Since group 13 elements possess three valence electrons, they form trivalent compounds with a sextet of electrons and a vacant orbital for the central atom. Consequently, these electron-deficient compounds accept electrons from other species to complete their octet in a chemical reaction. They...
17.1K
Acids, Bases and Neutralization Reactions
63.7K
An acid-base reaction is one in which a hydrogen ion, H+, is transferred from one chemical species to another. Such reactions are of central importance to numerous natural and technological processes, ranging from the chemical transformations within cells or lakes and oceans to the industrial-scale production of fertilizers, pharmaceuticals, and other substances essential to the society.
63.7K
Lewis Symbols and the Octet Rule
80.5K
Chemical bonds are complex interactions between two or more atoms or ions, which reduce the potential energy of the molecule. Gilbert N. Lewis developed a model called the Lewis model that simplified the depiction of chemical bond formation and provided straightforward explanations for the chemical bonds seen in most common compounds.
80.5K
Phase II Reactions: Glutathione Conjugation and Mercapturic Acid Formation
895
Glutathione, a tripeptide made up of glutamate, cysteine, and glycine, is a critical player in the detoxification of drugs and xenobiotics via a process known as glutathione conjugation or mercapturic acid formation. This phase II biotransformation reaction involves the covalent binding of glutathione to a drug or its metabolite, enhancing the compound's water solubility and enabling its excretion.
Several distinctive characteristics distinguish glutathione conjugation from other phase II...
Several distinctive characteristics distinguish glutathione conjugation from other phase II...
895
Phase II Reactions: Sulfation and Conjugation with α-Amino Acids
935
Sulfation and α-amino acid conjugation are two critical biotransformation reactions in drug metabolism. Sulfation, a phase II biotransformation reaction, involves adding a polar sulfate group to a drug, enhancing its water solubility and promoting excretion. This process can either co-occur with or occur independently of glucuronidation. Nonmicrosomal sulfotransferase enzymes catalyze the process. The reaction involves 3'-phosphoadenosine-5'-phosphosulfate or PAPS coenzyme...
935

