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Electroactive Covalent Organic Frameworks/Carbon Nanotubes Composites for Electrochemical Sensing
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-01-13 00:00:00 , DOI: 10.1021/acsanm.9b02257 Linyu Wang 1 , Yi Xie 1 , Yuxi Yang 1 , Huihui Liang 1 , Li Wang 1 , Yonghai Song 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-01-13 00:00:00 , DOI: 10.1021/acsanm.9b02257 Linyu Wang 1 , Yi Xie 1 , Yuxi Yang 1 , Huihui Liang 1 , Li Wang 1 , Yonghai Song 1
Affiliation
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An electroactive covalent organic framework (COFThi–TFPB) was prepared by a dehydration condensation reaction between 1,3,5-tris(p-formylphenyl)benzene (TFPB) and thionine (Thi) and wound with carbon nanotubes (CNTs) to design COFThi–TFPB–CNT composites for electrochemical sensing of ascorbic acid (AA) and pH. COFThi–TFPB was a highly ordered two-dimensional (2D) crystalline nanosheet, and its thickness was 0.75 nm. The loading of CNTs onto COFThi–TFPB nanosheets could significantly improve the dispersibility, stability, and catalytic activity of the CNTs. Here CNTs could well catalyze the oxidation of AA, while COFThi–TFPB had a pair of redox peaks that were inert for AA. Accordingly, a ratiometric electrochemical AA sensor was constructed by using the peak of COFThi–TFPB as the reference signal. The ratiometric AA sensor showed a detection limit of 17.68 μM and linear ranges of 53.04 μM to 4.00 mM and 4.00–8.00 mM, revealing a good performance, together with satisfactory selectivity, reproducibility, and stability. The redox peak potential of COFThi–TFPB was linearly shifted with the pH, so a pH sensor was constructed. The linear range and sensitivity of the pH sensor were 1–12 and 54 mV pH–1, respectively. The electroactive COFThi–TFPB–CNT might also be applied to construct other electrochemical sensors.
中文翻译：
用于电化学传感的电活性共价有机骨架/碳纳米管复合材料
通过1,3,5-三（对-甲酰基苯基）苯（TFPB）与硫氨酸（Thi）的脱水缩合反应制备电活性共价有机骨架（COF Thi–TFPB），并用碳纳米管（CNTs）缠绕设计COF Thi–TFPB –CNT复合材料用于电化学检测抗坏血酸（AA）和pH。COF Thi–TFPB是一种高度有序的二维（2D）晶体纳米片，其厚度为0.75 nm。将碳纳米管负载到COF Thi–TFPB纳米片上可以显着改善碳纳米管的分散性，稳定性和催化活性。碳纳米管可以很好地催化AA的氧化，而COF Thi–TFPB有一对对AA呈惰性的氧化还原峰。因此，通过使用COF Thi–TFPB的峰作为参考信号构建了比例电化学AA传感器。比例式AA传感器的检测限为17.68μM，线性范围为53.04μM至4.00 mM和4.00–8.00 mM，显示出良好的性能，以及令人满意的选择性，重现性和稳定性。COF Thi–TFPB的氧化还原峰电位随pH线性变化，因此构建了pH传感器。pH传感器的线性范围和灵敏度分别为1–12和54 mV pH –1。电活性COF Thi–TFPB –CNT也可用于构建其他电化学传感器。
更新日期：2020-01-13
中文翻译：
用于电化学传感的电活性共价有机骨架/碳纳米管复合材料
通过1,3,5-三（对-甲酰基苯基）苯（TFPB）与硫氨酸（Thi）的脱水缩合反应制备电活性共价有机骨架（COF Thi–TFPB），并用碳纳米管（CNTs）缠绕设计COF Thi–TFPB –CNT复合材料用于电化学检测抗坏血酸（AA）和pH。COF Thi–TFPB是一种高度有序的二维（2D）晶体纳米片，其厚度为0.75 nm。将碳纳米管负载到COF Thi–TFPB纳米片上可以显着改善碳纳米管的分散性，稳定性和催化活性。碳纳米管可以很好地催化AA的氧化，而COF Thi–TFPB有一对对AA呈惰性的氧化还原峰。因此，通过使用COF Thi–TFPB的峰作为参考信号构建了比例电化学AA传感器。比例式AA传感器的检测限为17.68μM，线性范围为53.04μM至4.00 mM和4.00–8.00 mM，显示出良好的性能，以及令人满意的选择性，重现性和稳定性。COF Thi–TFPB的氧化还原峰电位随pH线性变化，因此构建了pH传感器。pH传感器的线性范围和灵敏度分别为1–12和54 mV pH –1。电活性COF Thi–TFPB –CNT也可用于构建其他电化学传感器。
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