CAJ | 학술논문

制备了一种基于普鲁士蓝/PDDA-石墨烯复合膜的新型无酶电化学传感器,可以用于过氧化氢的灵敏检测。以聚二烯丙基二甲基氯化铵(PDDA)作为分散剂和功能化试剂制备了PDDA功能化的石墨烯(PDDA-G),然后将普鲁士蓝(PB)电沉积到PDDA-G修饰的玻碳电极表面,制备了PB/PDDA-G/GCE。实验发现,在工作电位为-0.3 V时,PB/PDDA-G/GCE作为传感器对H2 O2的电化学还原有很好的催化能力,响应时间小于5 s,这主要是缘于PDDA-G和PB的协同作用。在3.0μmol/L~2061μmol/L的范围内,H2O2的还原电流与其浓度呈现良好的线性关系,检出限为1.0μmol/L(S/N=3)。该修饰电极有望用于实际样品中H2 O2的快速检测。
제비료일충기우보로사람/PDDA-석묵희복합막적신형무매전화학전감기,가이용우과양화경적령민검측。이취이희병기이갑기록화안(PDDA)작위분산제화공능화시제제비료PDDA공능화적석묵희(PDDA-G),연후장보로사람(PB)전침적도PDDA-G수식적파탄전겁표면,제비료PB/PDDA-G/GCE。실험발현,재공작전위위-0.3 V시,PB/PDDA-G/GCE작위전감기대H2 O2적전화학환원유흔호적최화능력,향응시간소우5 s,저주요시연우PDDA-G화PB적협동작용。재3.0μmol/L~2061μmol/L적범위내,H2O2적환원전류여기농도정현량호적선성관계,검출한위1.0μmol/L(S/N=3)。해수식전겁유망용우실제양품중H2 O2적쾌속검측。
A novel,sensitive and enzymeless electrochemical sensor based on Prussian blue/poly( diallyldimethylam-monium chloride) functionalized graphene composite film was fabricated for the detection of hydrogen peroxide. Graphite oxide was synthesized chemically by Hummers method and then was reduced by hydrazine hydrate in the presence of PDDA. Prussian blue ( PB ) was deposited on PDDA-G matrix by electrochemical method. With the synergistic effect of PDDA-G and PB, the PDDA-G/PB composite film ( PB/PDDA-G/GCE ) modified electrode shows good electrocatalytic ablitily toward H2 O2 reduction,at an applied potential of -0. 3 V,which can be used as an H2 O2 enzymeless sensor. The sensor showed good response to H2 O2 reduction in a wide linear range of 3. 0μmol/L~2 061. 0 μmol/L,and the detection limit was 1. 0 μmol/L(S/N=3). This sensor will be promising for the fast detection of H2 O2 in real sample.