Construction of two-dimensional fluorescent covalent organic framework nanospheres for the detection and removal of tetracycline

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL Separation and Purification Technology Pub Date : 2023-10-07 DOI:10.1016/j.seppur.2023.125294

Wen-Zhi She, Chun-Hua Li, Rong Sheng Li, Jian Ling, Qiue Cao

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Abstract

The abuse of tetracycline (TCH) leads to a large number of residues in water and agricultural products, which poses a serious threat to the ecological environment and human health. Therefore, it is necessary to develop materials that can simultaneously detect and effectively remove tetracycline. In this paper, we designed and synthesized a two-dimensional fluorescent covalent organic framework nanosphere (ETTA-Nap-COF) for the detection and efficient removal of tetracycline. Due to the efficient photoinduced electron transfer (PET) between ETTA-Nap-COF and TCH, a significant fluorescence enhancement of the COF material could be observed in the presence of TCH under UV light illumination, thereby realizing a selective and sensitive fluorescence sensing of tetracycline. At the same time, the combination of π-π stacking and the porous network structure of ETTA-Nap-COF is conducive to the efficient adsorption and removal of tetracycline, and the maximum adsorption capacity can reach 457.72 mg/g. The ETTA-Nap-COF material has good recyclability and high structural stability. Our work provides a new research idea for fluorescence detection and efficient removal of tetracycline.

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用于四环素检测和去除的二维荧光共价有机框架纳米球的构建

四环素的滥用导致水和农产品中大量残留，对生态环境和人类健康构成严重威胁。因此，有必要开发能够同时检测并有效去除四环素的材料。本文设计并合成了一种用于检测和高效去除四环素的二维荧光共价有机框架纳米球(ETTA-Nap-COF)。由于eta - nap -COF与TCH之间存在有效的光致电子转移(PET)，在紫外光照射下，COF材料在TCH存在的情况下可以观察到明显的荧光增强，从而实现了四环素的选择性和敏感性荧光传感。同时，eta - nap - cof的π-π堆叠与多孔网络结构相结合，有利于高效吸附脱除四环素，最大吸附容量可达457.72 mg/g。tta - nap - cof材料具有良好的可回收性和较高的结构稳定性。本研究为荧光检测和高效脱除四环素提供了新的研究思路。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.