A high-selectivity electrochemical sensor for ultra-trace lead (II) detection based on a nanocomposite consisting of nitrogen-doped graphene/gold nanoparticles functionalized with ETBD and Fe₃O₄@TiO₂ core-shell nanoparticles

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• 作者：Fang-mei Liu^aAuthor Vitae ; Ya Zhang^a ; Wei Yin^a ; ^{yinweicqu@163.com} ; Chang-jun Hou^b ; Dan-qun Huo^b ; Bin He^a ; Lin-lin Qian^a ; Huan-bao Fa^a ; ^{huanbaofa@cqu.edu.cn}Author Vitae
• 关键词：Electrochemical sensor ; Fe3O4@TiO2@NG@Au@ETBD ; Pb2+ detection ; Modified electrode
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：242
• 期：Complete
• 页码：889-896
• 全文大小：2532 K
• 卷排序：242

文摘

The ETBD exhibited the nitrogen donor atoms to make a stable complexation with Pb2+ in capturing with extreme sensitivity and selectivity. The combine of Fe3O4@TiO2@NG@Au and ETBD facilitates the formation of more stable and more coherent conductive sites. The NG was served as nanocarrier to immobilize Au NPs, Fe3O4@TiO2 and ETBD. The synergistic effect of Fe3O4@TiO2@NG@Au@ETBD was applied to improve the sensitivity and selectivity. The aptasensor displayed low detection limit of 7.5 × 10−13 mol/L for Pb2+.