Electrochemical sensor for naphthols based on gold nanoparticles/hollow nitrogen-doped carbon microsphere hybrids functionalized with SH-¦Â-cyclodextrin

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• 作者：Gangbing Zhu ; Pengbo Gai ; Yan Yang ; Xiaohua Zhang ; Jinhua Chen ; ^{chenjinhua@hnu.edu.cn} ; ^{chenjh001@hotmail.com}
• 关键词：Electrochemical sensors ; Naphthol ; Hollow nitrogen-doped carbon microspheres ; Cyclodextrin ; Gold nanoparticles ; Environmental analysis
• 刊名：Analytica Chimica Acta
• 出版年：2012
• 出版时间：20 April, 2012
• 年：2012
• 卷：723
• 期：Complete
• 页码：33-38
• 全文大小：850 K

文摘

Due to awfully harmful to the environment and human health, the qualitative and quantitative determinations of naphthols [1-naphthol (1-NAP) and 2-naphthol (2-NAP)] are of great significance and receive great attention. In this paper, gold nanoparticles (AuNPs)/hollow nitrogen-doped carbon microspheres (HNCMS) hybrids (AuNPs/HNCMS) were prepared and functionalized with thiolated-¦Â-cyclodextrin (HS-¦Â-CD) for the first time, and then applied successfully in sensitive and simultaneous electrochemical detection of naphthols. The results show that the oxidation peak currents of naphthols obtained on the HS-¦Â-CD/AuNPs/HNCMS modified glassy carbon (GC) electrode are much higher than that on the AuNPs/HNCMS/GC, HNCMS/GC and bare GC electrodes. Additionally, compared with other electrochemical sensors developed previously, the proposed electrode results in improved detection limits of about four times for 1-NAP (1.0 nM) and two orders of magnitude for 2-NAP (1.2 nM). The linear response ranges of both 1-NAP and 2-NAP are 2-150 nM.