TbVO_(4)/g-C_(3)N_(4)复合材料的制备及其对Cd^(2+)的电致化学发光检测研究  

Preparation and Research of TbVO_(4)/g-C_(3)N_(4) Composite and Its Electrochemiluminescence Detection for Cd^(2+)

作　　者：宋珍勇 王婷婷 吴芳辉[1,2] 吴孔林 周经伟 SONG Zhen-yong;WANG Ting-ting;WU Fang-hui;WU Kong-lin;ZHOU Jing-wei(School of Chemistry and Chemical Engineering,Anhui University of Technology,Ma’anshan 243000,China;Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education,School of Civil Engineering&Architecture,Anhui University of Technology,Ma’anshan 243000,China)

机构地区：[1]安徽工业大学化学与化工学院,安徽马鞍山243000 [2]安徽工业大学建筑工程学院,生物膜法水质净化及利用技术教育部工程研究中心,安徽马鞍山243000

出　　处：《分析测试学报》2025年第2期302-309,共8页Journal of Instrumental Analysis

基　　金：安徽高校协同创新项目(GXXT-2022-006);生物膜法水质净化及利用技术教育部工程研究中心开放基金(BWPU2022KF04);省级大学生创新创业训练计划项目(S202310360223)。

摘　　要：以片状g-C_(3)N_(4)为载体,掺杂具有4f活性电子的电催化性能良好、含丰富氧空位、稳定性更佳的TbVO_(4),成功制备了在溶解氧作为共反应剂的条件下可用于重金属离子Cd^(2+)响应及微量检测的电致化学发光传感器材料。通过X射线粉末衍射仪(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、EDS能谱、X射线光电子能谱(XPS)等详细表征了复合材料的形貌、相态及元素组成和化学状态后,进一步研究发现增强了导电性和电催化活性的TbVO_(4)/g-C_(3)N_(4)复合材料具有比单一g-C_(3)N_(4)更强的ECL发光信号,由此触发了因Cd^(2+)阻抑作用引起的更为灵敏且线性检测范围更宽的ECL响应变化。该复合材料构筑的传感器检出限低(3.98nmol/L),选择性和重现性佳,用于真实样品中Cd^(2+)检测的精密度和准确度均较好。In this paper,while flaky graphitic carbon nitride(g-C_(3)N_(4))was selected as carrier materi⁃al,TbVO_(4) with good electrocatalytic performance,4f reactive electrons,rich oxygen vacancies and better stability was doped into g-C_(3)N_(4) for preparing a novel electrochemiluminescent(ECL)sensor composite.Prepared ECL sensor can be used for the response and trace detection of heavy metal ions Cd^(2+)with dissolved oxygen as the co-reactant.The morphology,phase state,elemental composition,and chemical state of the composite were comprehensively characterized using X-ray powder diffrac⁃tometry(XRD),transmission electron microscopy(TEM),scanning electron microscopy(SEM),energy-dispersive spectroscopy(EDS),and X-ray photoelectron spectroscopy(XPS).The subse⁃quent investigations reveal that TbVO_(4)/g-C_(3)N_(4) composite,possessing enhanced electrical conductivi⁃ty and electrocatalytic activity,exhibits more pronounced ECL emission signals compared to single g-C_(3)N_(4).Consequently,this leads to a heightened sensitivity and extended linear detection range of ECL response changes induced by Cd^(2+)inhibition.Moreover,the composite sensor also possesses low detection limit(3.98 nmol/L),excellent selectivity and reproducibility,as well as exceptional precision and accuracy for the quantification of Cd^(2+)in real samples.

关 键 词：片状石墨相氮化碳 TbVO_(4) 复合材料 电致化学发光 Cd^(2+) 

分 类 号：O657.1[理学—分析化学] X132[理学—化学]