{"title":"煅烧诱导增强纳米银支撑 CoZn 双金属 ZIF 的 Cd2+ 和 Pb2+ 电化学检测能力","authors":"Siyan Wang, Yangcan Zhao, Chengkai Xia, Wantong Zhu, Ying Hou, Xiangpeng Zeng and Hongyan Xu","doi":"10.1039/D3EN00956D","DOIUrl":null,"url":null,"abstract":"<p >Electrode materials with a large specific surface area, good conductivity, and efficient electrochemical catalytic activity are necessary for the rapid and accurate electrochemical detection of heavy metal ions. Based on the advantage of the high specific surface area of MOF materials, in this study, an Ag nanoparticle-supported CoZn bi-metal zeolitic imidazolate framework (Ag@ZIF) was decorated on working electrodes for Pb<small><sup>2+</sup></small> and Cd<small><sup>2+</sup></small> detection, and its conductivity and electrochemical catalytic activity were boosted to a high scale <em>via</em> calcination. A systematic study was conducted to discern the impact of the calcination temperature on the composition, structure, and electrochemical performance of Ag@ZIF. The investigation indicated that as the calcination temperature was increased from 600 °C to 1100 °C, the Co<small><sup>2+</sup></small> and Zn<small><sup>2+</sup></small> ions in Ag@ZIF were first combined into Co<small><sub>3</sub></small>ZnC and then transferred to metallic Co and Zn, accompanied with the complete evaporation of Zn at a high calcination temperature of 1000 °C. While the morphology of the calcinated Ag@ZIF turned from multiporous dodecahedra to multiporous spheres, followed by the collapse of the framework at 1100 °C. The Ag@ZIF calcinated at 1000 °C exhibited optimal performance for heavy metal ion detection, with a low limit of detection (Pb<small><sup>2+</sup></small> 7.28 nM, Cd<small><sup>2+</sup></small> 14.63 nM) and high sensitivity (Pb<small><sup>2+</sup></small> 8.907 μA μM<small><sup>−1</sup></small>, Cd<small><sup>2+</sup></small> 4.757 μA μM<small><sup>−1</sup></small>). Moreover, the fabricated sensor also demonstrated excellent selectivity, repeatability, and stability, making it suitable for detecting Pb<small><sup>2+</sup></small> and Cd<small><sup>2+</sup></small> in real water samples.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":" 5","pages":" 2061-2072"},"PeriodicalIF":5.1000,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Calcination-induced enhancement of Cd2+ and Pb2+ electrochemical detection capabilities of nano-ag-supported CoZn bi-metal ZIFs†\",\"authors\":\"Siyan Wang, Yangcan Zhao, Chengkai Xia, Wantong Zhu, Ying Hou, Xiangpeng Zeng and Hongyan Xu\",\"doi\":\"10.1039/D3EN00956D\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Electrode materials with a large specific surface area, good conductivity, and efficient electrochemical catalytic activity are necessary for the rapid and accurate electrochemical detection of heavy metal ions. Based on the advantage of the high specific surface area of MOF materials, in this study, an Ag nanoparticle-supported CoZn bi-metal zeolitic imidazolate framework (Ag@ZIF) was decorated on working electrodes for Pb<small><sup>2+</sup></small> and Cd<small><sup>2+</sup></small> detection, and its conductivity and electrochemical catalytic activity were boosted to a high scale <em>via</em> calcination. A systematic study was conducted to discern the impact of the calcination temperature on the composition, structure, and electrochemical performance of Ag@ZIF. The investigation indicated that as the calcination temperature was increased from 600 °C to 1100 °C, the Co<small><sup>2+</sup></small> and Zn<small><sup>2+</sup></small> ions in Ag@ZIF were first combined into Co<small><sub>3</sub></small>ZnC and then transferred to metallic Co and Zn, accompanied with the complete evaporation of Zn at a high calcination temperature of 1000 °C. While the morphology of the calcinated Ag@ZIF turned from multiporous dodecahedra to multiporous spheres, followed by the collapse of the framework at 1100 °C. The Ag@ZIF calcinated at 1000 °C exhibited optimal performance for heavy metal ion detection, with a low limit of detection (Pb<small><sup>2+</sup></small> 7.28 nM, Cd<small><sup>2+</sup></small> 14.63 nM) and high sensitivity (Pb<small><sup>2+</sup></small> 8.907 μA μM<small><sup>−1</sup></small>, Cd<small><sup>2+</sup></small> 4.757 μA μM<small><sup>−1</sup></small>). Moreover, the fabricated sensor also demonstrated excellent selectivity, repeatability, and stability, making it suitable for detecting Pb<small><sup>2+</sup></small> and Cd<small><sup>2+</sup></small> in real water samples.</p>\",\"PeriodicalId\":73,\"journal\":{\"name\":\"Environmental Science: Nano\",\"volume\":\" 5\",\"pages\":\" 2061-2072\"},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2024-03-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Science: Nano\",\"FirstCategoryId\":\"6\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2024/en/d3en00956d\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Science: Nano","FirstCategoryId":"6","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/en/d3en00956d","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Calcination-induced enhancement of Cd2+ and Pb2+ electrochemical detection capabilities of nano-ag-supported CoZn bi-metal ZIFs†
Electrode materials with a large specific surface area, good conductivity, and efficient electrochemical catalytic activity are necessary for the rapid and accurate electrochemical detection of heavy metal ions. Based on the advantage of the high specific surface area of MOF materials, in this study, an Ag nanoparticle-supported CoZn bi-metal zeolitic imidazolate framework (Ag@ZIF) was decorated on working electrodes for Pb2+ and Cd2+ detection, and its conductivity and electrochemical catalytic activity were boosted to a high scale via calcination. A systematic study was conducted to discern the impact of the calcination temperature on the composition, structure, and electrochemical performance of Ag@ZIF. The investigation indicated that as the calcination temperature was increased from 600 °C to 1100 °C, the Co2+ and Zn2+ ions in Ag@ZIF were first combined into Co3ZnC and then transferred to metallic Co and Zn, accompanied with the complete evaporation of Zn at a high calcination temperature of 1000 °C. While the morphology of the calcinated Ag@ZIF turned from multiporous dodecahedra to multiporous spheres, followed by the collapse of the framework at 1100 °C. The Ag@ZIF calcinated at 1000 °C exhibited optimal performance for heavy metal ion detection, with a low limit of detection (Pb2+ 7.28 nM, Cd2+ 14.63 nM) and high sensitivity (Pb2+ 8.907 μA μM−1, Cd2+ 4.757 μA μM−1). Moreover, the fabricated sensor also demonstrated excellent selectivity, repeatability, and stability, making it suitable for detecting Pb2+ and Cd2+ in real water samples.
期刊介绍:
Environmental Science: Nano serves as a comprehensive and high-impact peer-reviewed source of information on the design and demonstration of engineered nanomaterials for environment-based applications. It also covers the interactions between engineered, natural, and incidental nanomaterials with biological and environmental systems. This scope includes, but is not limited to, the following topic areas:
Novel nanomaterial-based applications for water, air, soil, food, and energy sustainability
Nanomaterial interactions with biological systems and nanotoxicology
Environmental fate, reactivity, and transformations of nanoscale materials
Nanoscale processes in the environment
Sustainable nanotechnology including rational nanomaterial design, life cycle assessment, risk/benefit analysis