{"title":"基于分子印迹复合材料的新型电化学传感器，使用邻苯二胺、纳米钼粒子和多壁碳纳米管检测水中的三氯生","authors":"Kusumita Dutta, S. Pushpavanam","doi":"10.1007/s12678-024-00900-y","DOIUrl":null,"url":null,"abstract":"<div><p>A novel electrochemical molecularly imprinted composite (MIC)-based sensor for detection of triclosan was developed. MIC was synthesized from o-phenylenediamine (o–PD), -COOH functionalized multiwalled carbon nanotube (<i>cf</i>-MWCNT), and triclosan by cyclic voltammetry on molybdenum nanoparticle (Mo-NP) embedded <i>cf</i>-MWCNT (Mo-<i>cf</i>-MWCNT) coated glassy carbon (GC) electrode, following removal of surface triclosan to form MIC/Mo-<i>cf</i>-MWCNT/GC. In our earlier work, two novel electrodes MIC/<i>cf</i>-MWCNT/GC and MIC/GC were fabricated. The presence of <i>cf</i>-MWCNT coating substrate on GC in MIC/<i>cf</i>-MWCNT/GC had improved the sensing performance than MIC/GC since presence of this substrate had decreased the electrochemical band gap (<i>E</i><sub><i>g</i></sub>) and increased Debye length (<i>λ</i><sub><i>d</i></sub>), Gibb’s free energy of adsorption (− <i>ΔG</i><sub>ads</sub>), electrochemical surface area (<i>A</i><sub><i>e</i></sub>), and surface redox site concentration (<i>C</i>*). Therefore, further improvement in sensing performance can be carried out by utilizing Mo-NP in the <i>cf</i>-MWCNT coating substrate using MIC to be the sensing material. This novel electrode (MIC/Mo-<i>cf</i>-MWCNT/GC) provided a limit of detection (LOD) of 900 ppt of triclosan, which was lower than the LOD achieved by using MIC/<i>cf-</i>MWCNT/GC (10 ppb) and MIC/GC (40 ppb). Adsorption isotherm was constructed for MIC/Mo-<i>cf</i>-MWCNT/GC delivering − <i>ΔG</i><sub>ads</sub> value of 59.049 kJ/mol indicating stronger chemisorption. To understand the role of Mo-<i>cf</i>-MWCNT in detection of triclosan, cyclic voltammetry, electrochemical impedance spectroscopy, and electrochemical band gap studies were conducted. This MIC/Mo-<i>cf</i>-MWCNT/GC showed good selectivity towards triclosan in presence of interfering ions.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 6","pages":"529 - 540"},"PeriodicalIF":2.7000,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A Molecularly Imprinted Composite-based Novel Electrochemical Sensor Using o-Phenylenediamine, Molybdenum Nanoparticle, and Multiwalled Carbon Nanotube for Triclosan Detection from Water\",\"authors\":\"Kusumita Dutta, S. Pushpavanam\",\"doi\":\"10.1007/s12678-024-00900-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A novel electrochemical molecularly imprinted composite (MIC)-based sensor for detection of triclosan was developed. MIC was synthesized from o-phenylenediamine (o–PD), -COOH functionalized multiwalled carbon nanotube (<i>cf</i>-MWCNT), and triclosan by cyclic voltammetry on molybdenum nanoparticle (Mo-NP) embedded <i>cf</i>-MWCNT (Mo-<i>cf</i>-MWCNT) coated glassy carbon (GC) electrode, following removal of surface triclosan to form MIC/Mo-<i>cf</i>-MWCNT/GC. In our earlier work, two novel electrodes MIC/<i>cf</i>-MWCNT/GC and MIC/GC were fabricated. The presence of <i>cf</i>-MWCNT coating substrate on GC in MIC/<i>cf</i>-MWCNT/GC had improved the sensing performance than MIC/GC since presence of this substrate had decreased the electrochemical band gap (<i>E</i><sub><i>g</i></sub>) and increased Debye length (<i>λ</i><sub><i>d</i></sub>), Gibb’s free energy of adsorption (− <i>ΔG</i><sub>ads</sub>), electrochemical surface area (<i>A</i><sub><i>e</i></sub>), and surface redox site concentration (<i>C</i>*). Therefore, further improvement in sensing performance can be carried out by utilizing Mo-NP in the <i>cf</i>-MWCNT coating substrate using MIC to be the sensing material. This novel electrode (MIC/Mo-<i>cf</i>-MWCNT/GC) provided a limit of detection (LOD) of 900 ppt of triclosan, which was lower than the LOD achieved by using MIC/<i>cf-</i>MWCNT/GC (10 ppb) and MIC/GC (40 ppb). Adsorption isotherm was constructed for MIC/Mo-<i>cf</i>-MWCNT/GC delivering − <i>ΔG</i><sub>ads</sub> value of 59.049 kJ/mol indicating stronger chemisorption. To understand the role of Mo-<i>cf</i>-MWCNT in detection of triclosan, cyclic voltammetry, electrochemical impedance spectroscopy, and electrochemical band gap studies were conducted. This MIC/Mo-<i>cf</i>-MWCNT/GC showed good selectivity towards triclosan in presence of interfering ions.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":535,\"journal\":{\"name\":\"Electrocatalysis\",\"volume\":\"15 6\",\"pages\":\"529 - 540\"},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2024-10-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrocatalysis\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s12678-024-00900-y\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrocatalysis","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s12678-024-00900-y","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
A Molecularly Imprinted Composite-based Novel Electrochemical Sensor Using o-Phenylenediamine, Molybdenum Nanoparticle, and Multiwalled Carbon Nanotube for Triclosan Detection from Water
A novel electrochemical molecularly imprinted composite (MIC)-based sensor for detection of triclosan was developed. MIC was synthesized from o-phenylenediamine (o–PD), -COOH functionalized multiwalled carbon nanotube (cf-MWCNT), and triclosan by cyclic voltammetry on molybdenum nanoparticle (Mo-NP) embedded cf-MWCNT (Mo-cf-MWCNT) coated glassy carbon (GC) electrode, following removal of surface triclosan to form MIC/Mo-cf-MWCNT/GC. In our earlier work, two novel electrodes MIC/cf-MWCNT/GC and MIC/GC were fabricated. The presence of cf-MWCNT coating substrate on GC in MIC/cf-MWCNT/GC had improved the sensing performance than MIC/GC since presence of this substrate had decreased the electrochemical band gap (Eg) and increased Debye length (λd), Gibb’s free energy of adsorption (− ΔGads), electrochemical surface area (Ae), and surface redox site concentration (C*). Therefore, further improvement in sensing performance can be carried out by utilizing Mo-NP in the cf-MWCNT coating substrate using MIC to be the sensing material. This novel electrode (MIC/Mo-cf-MWCNT/GC) provided a limit of detection (LOD) of 900 ppt of triclosan, which was lower than the LOD achieved by using MIC/cf-MWCNT/GC (10 ppb) and MIC/GC (40 ppb). Adsorption isotherm was constructed for MIC/Mo-cf-MWCNT/GC delivering − ΔGads value of 59.049 kJ/mol indicating stronger chemisorption. To understand the role of Mo-cf-MWCNT in detection of triclosan, cyclic voltammetry, electrochemical impedance spectroscopy, and electrochemical band gap studies were conducted. This MIC/Mo-cf-MWCNT/GC showed good selectivity towards triclosan in presence of interfering ions.
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