| 裴秀,陈洪卓,李亚明,罗刚.化学通报,2024,87(3):349-354. |
| 离子型共价有机框架材料的制备及对染料吸附性能的研究 |
| Synthesis of the ionic covalent organic framework as the absorbent for the adsorption of dyes. |
| 投稿时间：2023-06-26 修订日期：2023-07-25 |
| DOI： |
| 中文关键词: 离子型共价有机框架 茜素红 吸附 污水处理 |
| 英文关键词:Ionic covalent organic framework Alizarin red Adsorption Sewage treatment |
| 基金项目:国家自然(编号:52075234)；甘肃省自然(编号:20JR10RF814)；陇原青年创新创业人才项目(编号:2022LQGR49)；甘肃省高等学校创新(编号:2022B-475)；甘肃省高等学校创新(编号:2023B-430)；甘肃省高等学校创新(编号:2023B-433) |
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| 中文摘要: |
| 茜素红(Alizarin Red,AR)作为蒽醌类染料中的重要组成,由于其具有优异的特性,在染料和酸碱指示剂等方面被广泛使用。但是AR具有毒性高、结构复杂以及化学需氧量(COD)值大等原因,使其成为了主要污染物之一,去除水体中的茜素红染料污染物已经成为了目前亟待解决的问题。共价有机框架材料作为一种新型的多孔有机材料,由于其具有比表面积大,孔径均一和可设计的独特优势,已经广泛应用吸附和分离等方面。因此,以三醛基间苯三酚和溴化乙锭为构筑单元,通过水热的方法合成一种二维离子型共价有机框架材料(TpEB-COF)。对制备的TpEB-COF进行相关表征,包括X射线衍射仪(XRD),扫描电镜(SEM)和能量色散谱仪(EDS)等。然后将制备的TpEB-COF作为固体吸附剂,将其应用对水中AR的吸附,研究了不同吸附时间和不同pH值对吸附过程的影响。实验结果证明制备的离子型共价有机框架材料具有良好的晶型结构。同时,对实验数据分析表明,离子型共价有机框架材料对于茜素红的吸附符合准二级动力学方程和Langmuir吸附模型,吸附效率为82.8%,最大吸附量为828 mg g-1。本研究不仅为共价有机框架材料的设计和合成奠定坚实的基础,而且拓展了离子型共价有机框架材料的应用范围,促进共价有机框架材料的发展。 |
| 英文摘要: |
| Alizarin Red (AR), as an important component of anthraquinone dyes, is widely used in dyes and acid-base indicators because of its excellent properties. However, AR has high toxicity, complex structure and large chemical oxygen demand (COD) value, which makes it one of the main pollutants. The removal of alizarin red dye pollutants in water has become an urgent problem to be solved. As a new type of porous organic material, covalent organic framework materials have been widely used in adsorption and separation due to their unique advantages of large specific surface area, uniform pore size and designability. Therefore, a two-dimensional ionic covalent organic framework material (TpEB-COF) was synthesized by hydrothermal method using trialdehyde phloroglucinol and ethidium bromide as building units. The prepared TpEB-COF was characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). Then the prepared TpEB-COF was used as a solid adsorbent to adsorb AR in water. The effects of different adsorption times and different pH values on the adsorption process were studied. The experimental results show that the prepared ionic covalent organic framework materials have a good crystal structure. At the same time, the experimental data analysis showed that the adsorption of alizarin by ionic covalent organic framework materials conformed to the pseudo-second-order kinetic equation and Langmuir adsorption model. The adsorption efficiency was 82.8% and the maximum adsorption capacity was 828 g g-1. This study not only lays a solid foundation for the design and synthesis of covalent organic framework materials, but also expands the application scope of ionic covalent organic framework materials and promotes the development of covalent organic framework materials. |
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