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Electrochemical Sensor for Sensitive Determination of Ga(III) Ion Based on β-Cyclodextrin Incorporated Multi-walled Carbon Nanotubes and Imprinted Sol-gel Composite Film 被引量:2
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作者 Hu,Yufang zhang,Zhaohui +4 位作者 zhang,Huabin Luo,Lijuan zhang,minglei Yang,Xiao Yao,Shouzhuo 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2012年第2期377-385,共9页
A novel sensor for detection of trace gallium ion [Ga(III)] was created by stepwise modification of a gold electrode with fl-cyclodextrin (β-CD)/multi-walled carbon nanotubes (MWCNTs) and an ion imprinted polym... A novel sensor for detection of trace gallium ion [Ga(III)] was created by stepwise modification of a gold electrode with fl-cyclodextrin (β-CD)/multi-walled carbon nanotubes (MWCNTs) and an ion imprinted polymer (IIP). The sensor surface morphology was characterized by scanning electron microscopy. The electrochemical performance of the imprinted sensor was investigated by cyclic voltammetry, differential pulse voltammetry and chronoamperometry. The sensor displayed excellent selectivity towards the target Ga(III) ion. Meanwhile, the introduced MWCNTs displayed noticeable catalytic activity, and fl:CD demonstrated significant enrichment capacity. A linear calibration curve was obtained covering the concentration range from 5.0 × 10 8 to 1.0 × 10-4 moloL-1, with a detection limit of 7.6× 10 9 mol·L-1. The proposed sensor was successfully applied to detect Ga(III) in real urine samples. 展开更多
关键词 ion imprinted electrochemical sensor multi-walled carbon nanotubes Β-CYCLODEXTRIN Ga(III)-8- hydroxyquinoline complex
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