Construction of hydrophilic 4-sulfocalix[6]arene-functionalized carbon nanotubes decorated with AuPt bimetallic nanodendrites

被引:1
作者
Qian, Xingcan [1 ]
He, Xiu [2 ]
Zhang, Shilu [1 ]
Yang, Yongsheng [1 ]
Liu, Jun [1 ]
Dong, Jun [1 ]
Liang, Shiwei [1 ,2 ]
机构
[1] North Sichuan Med Coll, Sch Pharm, Nanchong 637100, Sichuan, Peoples R China
[2] North Sichuan Med Coll, Sch Basic Med Sci & Forens Med, Nanchong 637100, Sichuan, Peoples R China
关键词
Electrochemical simultaneous detection; AuPt bimetallic nanoparticles; Carbon nanotubes; 4-sulfocalix[6]arene; Ascorbic acid; Dopamine; Uric acid; SELECTIVE NONENZYMATIC GLUCOSE; ASCORBIC-ACID; URIC-ACID; ELECTROCHEMICAL SENSOR; HYDROGEN-PEROXIDE; CATALYTIC-REDUCTION; DOPAMINE; ELECTRODE; NANOPARTICLES; NANOCRYSTALS;
D O I
10.1007/s11051-023-05882-4
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Herein, a novel electrochemical biosensor has been proposed for highly sensitive and simultaneous determination of ascorbic acid (AA), dopamine (DA), and uric acid (UA) based on 4-sulfocalix[6]arene-functionalized carbon nanotubes (CNTs/SCX6) decorated with AuPt bimetallic nanoparticles. Ultraviolet-visible (UV-Vis) spectrophotometry, transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) mapping, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) have been applied to characterize the morphology and structure of CNTs/SCX6-AuPt. Cyclic voltammetry (CV), differential pulse voltammetry (DPV), and amperometric i-t curve reveal that CNTs/SCX6-AuPt-modified glassy carbon electrode (GCE) possesses excellent electrooxidation activity toward AA, DA, and UA. The obtained detection ranges of CNTs/SCX6-AuPt for simultaneous detection of AA, DA, and UA are 0.1-2 mM, 1.5-20 mu M, and 2-40 mu M with corresponding detection limits of 5.4 mu M, 0.08 mu M, and 0.37 mu M, respectively. The high electrocatalytic activity and rapid electronic transfer ability of CNTs/SCX6-AuPt result in high selectivity, stability, reproducibility, and repeatability. The constructed electrochemical sensor has been used to simultaneously determine AA, DA, and UA in urine samples with good recoveries, which may become a promising method for trace analysis of biological molecules in the complex physiological environment.
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页数:17
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