Copper nanoparticles/polyaniline/graphene composite as a highly sensitive electrochemical glucose sensor
A highly sensitive non-enzymatic glucose sensor based on Cu nanoparticles (CuNPs)/polyaniline (PANI)/ graphene nanocomposite was fabricated via simple in-situ reduction of Cu precursor in polyaniline nanofibers under mild conditions followed by mechanical mixing with graphene suspension to form the composites with different graphene contents (0.5%,1%,and 2%).The properties of nanocomposites were characterized by SEM,TEM,XRD,UV-Vis,and XPS.The CuNPs (d = 2-4 nm) only slightly altered the ordered structure of PANI.It was found that CuNPs have direct electronic interaction with PANI via the N atoms on the polymer backbone,which enabled fast electrons transfer from electrode to CuNPs through graphene and PANI.The CuNPs/PANI/ graphene nanocomposites were coated on a glassy carbon electrode for the investigation of their electrochemical properties.Both CuNPs/PANI and CuNPs/PANI/graphene showed high sensitivity towards glucose oxidation which occurred at ~0.5 V vs.SCE.The best performance was achieved by the CuNPs/PANI/1% graphenemodified electrode which showed sensitivity of ~150 mA cm-2 M-1,detection limit of 0.27 μM (S/N = 3),and response time of about 3 s.This system was also highly selective towards glucose oxidation that almost no signal was detected from interferents such as ascorbic acid and dopamine,demonstrating its great potential as a non-enzymatic glucose sensor.
Copper nanoparticles Polyaniline Non-enzymatic sensor Glucose electrooxidation Graphene
Weiran Zheng Liangsheng Hu Lawrence Yoon Suk Lee Kwok-Yin Wong
Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China
国际会议
南京
英文
155-160
2016-12-23（万方平台首次上网日期，不代表论文的发表时间）