Covalent organic framework as a novel electrochemical platform for highly sensitive and stable detection of lead

被引：102
作者：
Zhang, Ting [1 ,2 ]
Gao, Congwei [1 ]
Huang, Wei [1 ]
Chen, Yuling [1 ]
Wang, Yang [1 ,2 ]
Wang, Jianmin [2 ]
机构：
[1] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China
[2] Third Mil Med Univ, Inst Surg Res, Daping Hosp, State Key Lab Trauma Burns & Combined Injury, Chongqing 400042, Peoples R China
来源：
TALANTA | 2018年 / 188卷
基金：
中国国家自然科学基金;
关键词：
Covalent organic frameworks; Carbon paste electrode; Lead; Differential pulse anodic stripping voltammetry; Sensor; CARBON-PASTE ELECTRODE; SOLID-PHASE EXTRACTION; VOLTAMMETRIC DETERMINATION; IONS DETECTION; CADMIUM; PB(II); CRYSTALLINE; NANOTUBES; PRECONCENTRATION; CONSTRUCTION;
D O I：
10.1016/j.talanta.2018.06.032
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A sensitive and selective TAPB-DMTP-COF (TAPB, 1,3,5-tris(4-aminophenyl)benzene; DMTP, 2,5-dimethoxyterephaldehyde; COF, covalent organic framework) modified carbon paste electrode was evaluated as a novel electrochemical sensor for the determination of lead in an aqueous medium. Lead was accumulated on the TAPBDMTP-COF surface by the complexation with the amine groups, and detected by differential pulse anodic stripping voltammetry. Due to the distinct structure features of COF, the resulting sensor revealed a fast electron transfer rate and outstanding adsorption capacity for lead. The influence of various experimental parameters (the content of COF, pH of the electrolyte solution, accumulation potential, and accumulation time) on the peak current were investigated in the overall analysis procedure. Under optimum conditions, the method showed an excellent linearity to the concentration of lead in the range of 0.0050 to 2.0 mu mol/L with a detection limit of 1.9 nmol/L, and the relative standard deviation was 3.1% for 0.50 mu mol/L of lead (n = 11). This method not only displays the feasibility of COF based sensor for trace levels of metal ions detection but also broadens the scope of applications of COF based hybrid materials in electroanalytical chemistry.
引用
收藏
页码：578 / 583
页数：6
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