{"title":"CeO2QDs-g-C3N4/C 复合材料的制备及黄曲霉毒素 B1 的电化学测定","authors":"","doi":"10.1016/j.surfin.2024.105138","DOIUrl":null,"url":null,"abstract":"<div><div>The presence of Aflatoxin B1 (AFB1) in food represents a significant threat to human health, leading to the development of cancer. The key factor for effective trace detection technology lies in the utilization of sensor materials that exhibit excellent selectivity and high sensitivity properties. In this study, a successfully synthesis of g-C<sub>3</sub>N<sub>4</sub>/C with a high specific surface area uses melamine and houttuynia cordata stem as starting materials. A CeO<sub>2</sub>QDs-g-C<sub>3</sub>N<sub>4</sub>/C composite was prepared by hydrothermally anchoring cerium oxide quantum dots (CeO<sub>2</sub>QDs) onto the surface of g-C<sub>3</sub>N<sub>4</sub>/C, the high redox efficiency of CeO<sub>2</sub>QDs and the small size limitation effect significantly improve the sensing performance. The composite was characterized by XRD, XPS, SEM, TEM, and N<sub>2</sub> adsorption-desorption. The results revealed that, the CeO<sub>2</sub>QDs-g-C<sub>3</sub>N<sub>4</sub>/C composite sensor material exhibited significant advantages with a large specific surface area, a well-defined micropore structure, and abundant reactive sites. In addition, electrochemical activity tests are conducted using EIS, CV, and DPV for the purpose of electrochemical investigations. The CeO<sub>2</sub>QDs-g-C<sub>3</sub>N<sub>4</sub>/C/GCE exhibits exceptional electrocatalytic activity against AFB1, with a wide linear response range of 100–1300 pg ml<sup>-1</sup>, an impressively low detection limit (LOD) of 6.61 fg ml<sup>-1</sup> (S/<em>N</em> = 3), and a sensitivity of 0.985 pg μM ml<sup>-1</sup>μA<sup>-1</sup>. Furthermore, the stability, repeatability, and interference experimental response errors all remain below 5 %. It is also noteworthy that, the sensor material demonstrates excellent practicality in AFB1 assays conducted on real samples, which serves to illustrate its immense potential for applications in food safety evaluation.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Preparation of CeO2QDs-g-C3N4/C composites and electrochemical determination of aflatoxin B1\",\"authors\":\"\",\"doi\":\"10.1016/j.surfin.2024.105138\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The presence of Aflatoxin B1 (AFB1) in food represents a significant threat to human health, leading to the development of cancer. The key factor for effective trace detection technology lies in the utilization of sensor materials that exhibit excellent selectivity and high sensitivity properties. In this study, a successfully synthesis of g-C<sub>3</sub>N<sub>4</sub>/C with a high specific surface area uses melamine and houttuynia cordata stem as starting materials. A CeO<sub>2</sub>QDs-g-C<sub>3</sub>N<sub>4</sub>/C composite was prepared by hydrothermally anchoring cerium oxide quantum dots (CeO<sub>2</sub>QDs) onto the surface of g-C<sub>3</sub>N<sub>4</sub>/C, the high redox efficiency of CeO<sub>2</sub>QDs and the small size limitation effect significantly improve the sensing performance. The composite was characterized by XRD, XPS, SEM, TEM, and N<sub>2</sub> adsorption-desorption. The results revealed that, the CeO<sub>2</sub>QDs-g-C<sub>3</sub>N<sub>4</sub>/C composite sensor material exhibited significant advantages with a large specific surface area, a well-defined micropore structure, and abundant reactive sites. In addition, electrochemical activity tests are conducted using EIS, CV, and DPV for the purpose of electrochemical investigations. The CeO<sub>2</sub>QDs-g-C<sub>3</sub>N<sub>4</sub>/C/GCE exhibits exceptional electrocatalytic activity against AFB1, with a wide linear response range of 100–1300 pg ml<sup>-1</sup>, an impressively low detection limit (LOD) of 6.61 fg ml<sup>-1</sup> (S/<em>N</em> = 3), and a sensitivity of 0.985 pg μM ml<sup>-1</sup>μA<sup>-1</sup>. Furthermore, the stability, repeatability, and interference experimental response errors all remain below 5 %. It is also noteworthy that, the sensor material demonstrates excellent practicality in AFB1 assays conducted on real samples, which serves to illustrate its immense potential for applications in food safety evaluation.</div></div>\",\"PeriodicalId\":22081,\"journal\":{\"name\":\"Surfaces and Interfaces\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.7000,\"publicationDate\":\"2024-09-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Surfaces and Interfaces\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S246802302401294X\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surfaces and Interfaces","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S246802302401294X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Preparation of CeO2QDs-g-C3N4/C composites and electrochemical determination of aflatoxin B1
The presence of Aflatoxin B1 (AFB1) in food represents a significant threat to human health, leading to the development of cancer. The key factor for effective trace detection technology lies in the utilization of sensor materials that exhibit excellent selectivity and high sensitivity properties. In this study, a successfully synthesis of g-C3N4/C with a high specific surface area uses melamine and houttuynia cordata stem as starting materials. A CeO2QDs-g-C3N4/C composite was prepared by hydrothermally anchoring cerium oxide quantum dots (CeO2QDs) onto the surface of g-C3N4/C, the high redox efficiency of CeO2QDs and the small size limitation effect significantly improve the sensing performance. The composite was characterized by XRD, XPS, SEM, TEM, and N2 adsorption-desorption. The results revealed that, the CeO2QDs-g-C3N4/C composite sensor material exhibited significant advantages with a large specific surface area, a well-defined micropore structure, and abundant reactive sites. In addition, electrochemical activity tests are conducted using EIS, CV, and DPV for the purpose of electrochemical investigations. The CeO2QDs-g-C3N4/C/GCE exhibits exceptional electrocatalytic activity against AFB1, with a wide linear response range of 100–1300 pg ml-1, an impressively low detection limit (LOD) of 6.61 fg ml-1 (S/N = 3), and a sensitivity of 0.985 pg μM ml-1μA-1. Furthermore, the stability, repeatability, and interference experimental response errors all remain below 5 %. It is also noteworthy that, the sensor material demonstrates excellent practicality in AFB1 assays conducted on real samples, which serves to illustrate its immense potential for applications in food safety evaluation.
期刊介绍:
The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results.
Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)