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A novel covalent organic framework with multiple adsorption sites for removal of Hg2+ and sensitive detection of nitrofural
Journal of Industrial and Engineering Chemistry ( IF 6.1 ) Pub Date : 2021-11-17 , DOI: 10.1016/j.jiec.2021.11.014
Linyu Wang 1 , Yonghai Song 1 , Ying Luo 1 , Li Wang 1
Affiliation  

It is urgent to control serious drug pollution and heavy metal ion pollution. Covalent organic framework (COF) is becoming a promising material for the removal of heavy metal ion and adsorption of organic small molecule because of the designed functional sites, ordered pore channel, high specific surface area and abundant π electrons. Herein, 2,4,6-triformylphloroglucinol (TFP) and benzene-1,3,5-tricarbohydrazide (BTH) was used to design a stable yet efficient beta-ketoenamine COF (COFTFP-BTH) adsorbent, which would provide multiple adsorption sites of Hg2+ by dense acylhydrazine. The maximum adsorption capacity of COFTFP-BTH toward Hg2+ achieved 909 mg g−1, coinciding with Langmuir adsorption and pseudo-second-order adsorption kinetic model, with the h value as high as 71.43 mg g−1 min−1. COFTFP-BTH was also grown on NH2-carbon nanotubes (CNT) to form a novel COFTFP-BTH@NH2-CNT composite for sensitive detection of nitrofural (NF). The NF sensor based on COFTFP-BTH@NH2-CNT showed a low detection limit (3.2 nM) and a wide linear range (9.6 nM-100 μM). The excellent performances were also attributed to the ordered channels of COFTFP-BTH exposing more adsorption sites of Hg2+ and NF, as well as the good stability of beta-ketoenamine COFTFP-BTH.



中文翻译:

一种具有多个吸附位点的新型共价有机框架,用于去除 Hg2+ 和灵敏检测呋喃西林

治理严重的药物污染和重金属离子污染刻不容缓。共价有机骨架(COF)具有设计好的功能位点、有序的孔道、高比表面积和丰富的π电子等优点,正成为一种很有前途的去除重金属离子和吸附有机小分子的材料。在此,使用 2,4,6-三甲酰间苯三酚 (TFP) 和苯-1,3,5-三碳酰肼 (BTH) 设计了一种稳定而高效的 β-酮烯胺 COF (COF TFP-BTH ) 吸附剂,可提供多重吸附Hg 2+位点被浓酰肼。COF TFP-BTH对Hg 2+的最大吸附量达到909 mg g -1,与Langmuir吸附和准二级吸附动力学模型一致,h值高达71.43 mg g -1  min -1。COF TFP-BTH也在 NH 2 -碳纳米管 (CNT) 上生长,以形成新型 COF TFP-BTH @NH 2 -CNT 复合材料,用于灵敏检测呋喃西林 (NF)。基于 COF TFP-BTH @NH 2 -CNT 的 NF 传感器显示出低检测限 (3.2 nM) 和宽线性范围 (9.6 nM-100 μM)。优异的性能也归因于COF TFP-BTH的有序通道暴露了更多的Hg 2+吸附位点和NF,以及β-酮烯胺COF TFP-BTH的良好稳定性。

更新日期:2022-01-19
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