3D-Flower-Like Copper Sulfide Nanoflake-Decorated Carbon Nanofragments-Modified Glassy Carbon Electrodes for Simultaneous Electrocatalytic Sensing of Co-existing Hydroquinone and Catechol

被引：26
作者：
Alshahrani, Lina Abdullah [1 ,2 ]
Miao, Liqiong [1 ,2 ]
Zhang, Yanyu [1 ,2 ]
Cheng, Shengming [1 ,2 ]
Sathishkumar, Palanivel [1 ,2 ]
Saravanakumar, Balasubramaniam [1 ,2 ]
Nan, Junmin [1 ,2 ]
Gu, Feng Long [1 ,2 ]
机构：
[1] South China Normal Univ, Key Lab Theoret Chem Environm, Minist Educ, Guangzhou 510006, Guangdong, Peoples R China
[2] South China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China
来源：
SENSORS | 2019年 / 19卷 / 10期
基金：
中国国家自然科学基金;
关键词：
carbon nanofragments; copper sulfide; catechol; hydroquinone; electrochemical sensor; simultaneous determination; SIMULTANEOUS ELECTROCHEMICAL DETERMINATION; GRAPHENE OXIDE; DIHYDROXYBENZENE ISOMERS; HIGH-PERFORMANCE; NANO-FRAGMENTS; RESORCINOL; NANOTUBES; EFFICIENT; SENSOR; TRANSPARENT;
D O I：
10.3390/s19102289
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A copper sulfide nanoflakes-decorated carbon nanofragments-modified glassy carbon electrode (CuS-CNF/GCE) was fabricated for the electrocatalytic differentiation and determination of hydroquinone (HQ) and catechol (CC). The physicochemical properties of the CuS-CNF were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy. The electrocatalytic determination of HQ and CC over the CuS-CNF/GCE was evaluated by cyclic voltammetry and differential pulse voltammetry. An excellent detection limit and sensitivity of the CuS-CNF/GCE are obtained (0.293 mu M and 0.259 mu M) with a sensitivity of 184 nA mu M-1 cm(-2) and 208 nA mu M-1 cm(-2) (S/N=3) for HQ and CC, respectively. In addition, the CuS-CNF/GCE shows a selective identification of HQ and CC over potential interfering metal ions (Zn2+, Na+, K+, NO3-, SO42-, Cl-) and organic compounds (ascorbic acid, glucose), and a satisfactory recovery is also obtained in the spiked water samples. These results suggest that the CuS-CNF/GCE can be used as an efficient electrochemical sensor for the simultaneous determination of co-existing environmental pollutants such as HQ and CC in water environments with high selectivity and acceptable reproducibility.
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页数：12
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