相关实验视频
Updated: Aug 9, 2026
05:58
Deposition of Porous Sorbents on Fabric Supports
Published on: June 12, 2018
6.5K
使用基于关尼的共价有机聚合物直接吸附高效的红色染料
Narges Abdolhossein Rejali1, Mohammad Dinari2
1Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
Scientific reports
|April 21, 2025
概括
这项研究开发了一种阴离子共价有机聚合物 (COP),用于有效地从水中去除直色4BS (DS-4BS) 阴离子染料. 新型COP吸附剂表现出高吸附能力,表明其在净水应用中的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 聚合物化学 聚合物化学
背景情况:
- 离子共价有机聚合物 (COP) 与中性对应物相比,对水污染物具有优越的吸附能力.
- 它们的有效性源于电静电吸引力和离子交换机制的结合.
- 开发高效的吸附剂对于应对水污染挑战至关重要.
研究的目的:
- 通过一种简单的直接方法合成一个阴离子COP.
- 评估COP在清除直接红4BS (DS-4BS) 离子染料方面的表现.
- 为了阐明吸附机制和热力学特性.
主要方法:
- 制造一个阴离子COP.
- 使用FT-IR,TGA,BET,XRD,泽塔电位和FE-SEM/EDS进行表征.
- 吸附实验以确定容量,动力学和热力学.
- 使用朗格穆尔和伪二阶模型进行分析.
主要成果:
- 在pH 2下,DS-4BS染料的最大吸附能力 (qmax) 为236.4 mg/g.
- 吸附过程遵循兰木尔 (单层) 和伪二阶动力学.
- 物理吸附是主要的机制,吸附能量 (Ea) 为4.5kJ/mol.
- 用热力学参数表示的自发和内热吸附过程 (ΔG0 < 0, ΔH0 = 38.5 kJ/mol).
结论:
- 合成的阴阳性COP是DS-4BS离子染料去除的高效吸附剂.
- 吸附过程是自发的,高效的,并由物理吸附驱动.
- 这些发现突显了离子COP在废水处理中的潜力.
相关概念视频
01:32Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview
Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction mixture.
01:38Preparation of Amines: Reductive Amination of Aldehydes and Ketones
Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.