还原氧化石墨烯-多壁碳纳米管复合膜负载金纳米粒子修饰玻碳电极检测双酚A

以水合肼为还原剂,采用均相还原法制备还原氧化石墨烯-多壁碳纳米管复合材料(rGO-MWCNTs),通过滴涂法将其修饰到玻碳电极(GCE)表面。以此复合材料为载体,采用电化学方法制备了金纳米粒子-还原氧化石墨烯-多壁碳纳米管复合膜修饰电极(AuNPs-rGO-MWCNTs/GCE)。通过扫描电镜(SEM)、EDS能谱技术和电化学方法对此电极进行了表征。研究了双酚A在修饰电极上的电化学行为。结果表明,此电极对双酚A的电极过程具有良好的电化学活性,在0.10 mol/L PBS溶液(pH 7.0)中,微分脉冲伏安法测定双酚A的线性范围为5.0×10~(-9)~1.0×10~(-7)mol/L和1.0...

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Published in分析化学 Vol. 45; no. 5; pp. 713 - 720
Main Author 于浩 冯晓 陈小霞 乔金丽 高小玲 徐娜 高楼军
Format Journal Article
LanguageChinese
Published 延安大学 化学与化工学院,延安 716000 2017
陕西省化学反应工程重点实验室,延安 716000%延安大学 化学与化工学院,延安,716000
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Summary:以水合肼为还原剂,采用均相还原法制备还原氧化石墨烯-多壁碳纳米管复合材料(rGO-MWCNTs),通过滴涂法将其修饰到玻碳电极(GCE)表面。以此复合材料为载体,采用电化学方法制备了金纳米粒子-还原氧化石墨烯-多壁碳纳米管复合膜修饰电极(AuNPs-rGO-MWCNTs/GCE)。通过扫描电镜(SEM)、EDS能谱技术和电化学方法对此电极进行了表征。研究了双酚A在修饰电极上的电化学行为。结果表明,此电极对双酚A的电极过程具有良好的电化学活性,在0.10 mol/L PBS溶液(pH 7.0)中,微分脉冲伏安法测定双酚A的线性范围为5.0×10~(-9)~1.0×10~(-7)mol/L和1.0×10~(-7)~2.0×10~(-5)mol/L,检出限为1.0×10~(-9)mol/L(S/N=3)。将此电极用于模拟水样和超市购物小票样品中双酚A含量的测定,加标回收率分别为97%~110%和98%~104%。
Bibliography:YU Hao 1,2 , FENG Xiao1 ,CHEN Xiao-Xia1 ,QIAO Jin -Li 1 ,GAO Xiao-Ling1 ,XU Na 1 ,GAO L ou-Jun1 1 ( College of Chemistry and Chemical Engineering, Yan'an University, Yan忆 an 116000, China)2 ( Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an 7 1 6 0 00, China)
A glassy carbon electrode (GCE) modified with gold nanoparticles loading on the reduced graphene oxide (rGO)-multi-walled carbon nanotubes (MWCNTs) composite film was fabricated by a two- step procedure. Firstly, rGO-MWCNTs composite were prepared by in-situ chemical reduction method with hydrazine as a reducing agent. Then, AuNPs were deposited on the surface of rGO-MWCNTs using simple cyclic voltammetry. This modified electrode was characterized using scanning electron microscopy ( SEM), energy-dispersive X-ray spectroscopy (EDS) and electrochemical methods. Furthermore, the electrochemical behavior of bisphenol A (BPA) was also investigated using this modified electrode. The results showed that the modified electrode had high electrochem
ISSN:0253-3820
DOI:10.11895/j.issn.0253-3820.160768