基于纳米SnS/多壁碳纳米管复合物的2,4-二氯苯酚电化学传感器的制备及应用
Preparation and Application of 2,4-Dichlorophenol Electrochemical Sensor Based on Nano-SnS/Multi-Walled Carbon Nanotubes Composite
摘 要
采用均匀沉淀法制备纳米SnS/多壁碳纳米管(MWCNTs)复合物,利用场发射扫描电子显微镜(SEM)、X射线粉末衍射仪(XRD)和热重分析仪(TGA)对其形貌和组成进行表征。将纳米SnS/MWCNTs复合物10 mg超声分散在1.0 mL 5%(体积分数)全氟化树脂溶液中,分取8.0 μL滴涂于处理好的玻碳电极(GCE)表面,得到修饰电极(纳米SnS/MWCNTs/GCE)。以纳米SnS/MWCNTs/GCE为工作电极,铂丝电极为对电极,饱和甘汞电极为参比电极,采用循环伏安法(CV)、电化学阻抗谱法(EIS)和差分脉冲伏安法(DPV)对纳米SnS/MWCNTs/GCE电化学性能进行考察,研究了2,4-二氯苯酚(2,4-DCP)在纳米SnS/MWCNTs/GCE上的电化学行为。结果表明:在pH 7.0的磷酸盐缓冲溶液中,纳米SnS/MWCNTs/GCE对2,4-DCP有明显的电催化作用和较高的选择性;2,4-DCP的浓度在0.05~3.00 μmol·L-1内与DPV响应的氧化峰电流呈线性关系,检出限(3S/N)为2.3×10-8mol·L-1;按照标准加入法对水样进行回收试验,2,4-DCP回收率为92.0%~101%。
多壁碳纳米管(MWCNTs)
2,4-二氯苯酚(2,4-DCP)
电化学传感器
nano-SnS
multi-walled carbon nanotubes (MWCNTs)
2,4-dichlorophenol (2,4-DCP)
electrochemical sensor
Abstract
Nano-SnS/multi-walled carbon nanotubes (MWCNTs) composite was prepared through homogeneous precipitation method, and the morphology and constitution were characterized by field emission scanning electron microscopy (SEM), X-ray powder diffractometer (XRD) and thermal gravimetric analyzer (TGA). Nano-SnS/MWCNTs composite (10 mg) was dispersed in 1.0 mL of 5% (volume fraction) perfluorinated resin solution by ultrasonic, and the modified electrode was obtained by dripping 8.0 μL of aliquot onto the surface of treated glassy carbon electrode (GCE), which was denoted as nano-SnS/MWCNTs/GCE. The electrochemical property of nano-SnS/MWCNTs/GCE was investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV) using nano-SnS/MWCNTs/GCE as working electrode, platinum wire electrode as counter electrode, and saturated calomel electrode as reference electrode, and the electrochemical behavior of 2,4-dichlorophenol (2,4-DCP) on nano-SnS/MWCNTs/GCE was studied. As shown by the results, nano-SnS/MWCNTs/GCE had obvious electrocatalytic effect and high selectivity for 2,4-DCP in phosphate buffer solution at pH 7.0. Linear relationship between the concentration of 2,4-DCP and the oxidation peak current by DPV response was kept in the range of 0.05-3.00 μmol·L-1, with detection limit (3S/N) of 2.3×10-8mol·L-1. Test for recovery was made on the water sample by standard addition method, giving results in the range of 92.0%-101% for 2,4-DCP.
中图分类号 O657.1 DOI 10.11973/lhjy-hx202307006
所属栏目 工作简报
基金项目 唐山师范学院科学研究基金项目(2020A01)
收稿日期 2021/12/16
修改稿日期
网络出版日期
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备注李改花,讲师,博士,研究方向为纳米材料电化学,luoye870815@163.com
引用该论文: LI Gaihua,LIU Shuang,LUO Baojing. Preparation and Application of 2,4-Dichlorophenol Electrochemical Sensor Based on Nano-SnS/Multi-Walled Carbon Nanotubes Composite[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2023, 59(7): 776～782
李改花,刘爽,罗宝晶. 基于纳米SnS/多壁碳纳米管复合物的2,4-二氯苯酚电化学传感器的制备及应用[J]. 理化检验－化学分册, 2023, 59(7): 776～782
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【4】GUO L A, LEE H K. Electro membrane extraction followed by low-density solvent based ultrasound-assisted emulsification microextraction combined with derivatization for determining chlorophenols and analysis by gas chromatography-mass spectrometry[J]. Journal of Chromatography A, 2012,1243:14-22.
【5】ZHENG C, ZHAO J, BAO P, et al. Dispersive liquid-liquid microextraction based on solidification of floating organic droplet followed by high-performance liquid chromatography with ultraviolet detection and liquid chromatography-tandem mass spectrometry for the determination of triclosan and 2,4-dichlorophenol in water samples[J]. Journal of Chromatography A, 2011,1218(25):3830-3836.
【6】RAMA R M J, MEDINA A R, DÍAZ A M. A simple and straightforward procedure for monitoring phenol compounds in waters by using UV solid phase transduction integrated in a continuous flow system[J]. Microchimica Acta, 2003,141(3):143-148.
【7】ADAM V, KIZEK R. Utilization of electrochemical sensors and biosensors in biochemistry and molecular biology[J]. Sensors, 2008,8(10):6125-6131.
【8】ZAHIRIFAR F, RAHIMNEJAD M, ABDULKAREEM R A, et al. Determination of diazinon in fruit samples using electrochemical sensor based on carbon nanotubes modified carbon paste electrode[J]. Biocatalysis and Agricultural Biotechnology, 2019,20:101245.
【9】HANRAHAN G, PATIL D G, WANG J. Electrochemical sensors for environmental monitoring: Design, development and applications[J]. Journal of Environmental Monitoring, 2004,6(8):657-664.
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【23】ZHOU W W, ZHU J X, CHENG C W, et al. A general strategy toward graphene@metal oxide core-shell nanostructures for high-performance lithium storage[J]. Energy & Environmental Science, 2011,4(12):4954-4961.
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