Electrochemical sensing of nicotine using CuWO4 decorated reduced graphene oxide immobilized glassy carbon electrode

被引:90
作者
Karthika, A. [1 ]
Karuppasamy, P. [4 ]
Selvarajan, S. [1 ]
Suganthi, A. [1 ,2 ]
Rajarajan, M. [3 ]
机构
[1] Thiagarajar Coll, PG & Res Dept Chem, Madurai 625009, Tamil Nadu, India
[2] Mother Teresa Womens Univ, Kodaikanal 624102, Tamil Nadu, India
[3] Madurai Kamaraj Univ, Madurai 62502, Tamil Nadu, India
[4] Anna Univ Reg Campus Tirunelveli, Tirunelveli 627007, Tamil Nadu, India
关键词
CuWO4/rGO nanocomposite; Electrochemical sensor; Nicotine; PERFORMANCE LIQUID-CHROMATOGRAPHY; RAMAN-SPECTROSCOPY; AMPEROMETRIC DETERMINATION; CAPILLARY-ELECTROPHORESIS; SENSITIVE DETECTION; TOBACCO PRODUCTS; COPPER TUNGSTATE; N-NITROSAMINES; NANOCOMPOSITE; NANOPARTICLES;
D O I
10.1016/j.ultsonch.2019.01.038
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
A novel and selective electrochemical sensing of nicotine is studied using copper tungstate decorated reduced graphene oxide nanocomposite (CuWO4/rGO) nafion (NO immobilized GC electrode (GCE). The CuWO4/rGO nanocomposite is synthesized using sonication method and characterized by HR-TEM (High resolution transmission electron microscopy), SEM (Scanning electron microscopy), FT-IR (Fourier transform infrared spectroscopy), SAED (Selected area of electron diffraction pattern), XRD (X-ray diffraction), Raman spectroscopy, Thermo gravimetric analysis (TGA) and EDX (Energy dispersive X-ray diffraction) techniques. The CuWO4/rGO/Nf immobilized GCE shows better electrocatalytic response for the detection of nicotine as compared to bare GCE. A better selectivity and sensitivity is achieved using CuWO4/rGO/Nf immobilized GCE to detect 0.1 mu M nicotine in the presence of 100-fold excess concentrations of different interferents. The present CuWO4/rGO/Nf immobilized GCE electrochemical sensor exhibits an ample range of sensing from 0.1 mu M to 0.9 mu M and the low detection limit is found to be 0.035 mu M (S/N = 3). Comparable results are achieved for the determination of nicotine in various real samples such as cigarettes (Gold flake and Wills) and urine samples with improved recoveries.
引用
收藏
页码:196 / 206
页数:11
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