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

Sensors

Balasubramaniam Saravanakumar¹  FengLong Gu¹  Liqiong Miao¹  Shengming Cheng¹  Palanivel Sathishkumar²  LinaAbdullah Alshahrani²  Yanyu Zhang²  Junmin Nan² 

[1] School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China;Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education;

关键词: carbon nanofragments;    copper sulfide;    catechol;    hydroquinone;    electrochemical sensor;    simultaneous determination;   

DOI  :  10.3390/s19102289

来源: DOAJ

【 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 µM and 0.259 µM) with a sensitivity of 184 nA µM⁻¹ cm⁻² and 208 nA µM⁻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.

【 授权许可】

Unknown