检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]广西师范大学化学与药学学院广西低碳能源材料重点实验室,广西桂林541004
出 处:《电化学》2016年第1期57-63,共7页Journal of Electrochemistry
基 金:国家自然科学基金(No.21463007;No.21263002);广西自然科学基金(No.2013GXNSFAA019024);广西教育厅科学技术研究项目(No.2013YB026)资助
摘 要:以玻碳电极(GCE)为基底电化学聚合制得聚3,4-乙烯二氧噻吩(PEDOT)膜修饰电极,再通过Nafion共固定磷钼酸和石墨烯构建了一种新型的无酶电化学H_2O_2传感器.利用扫描电子显微镜(SEM)表征制得的修饰电极,并通过循环伏安法和计时电流法研究了传感器对H_2O_2的响应性能.结果表明,在优化条件下,该传感器对H_2O_2还原具有良好的电催化性能,检测H_2O_2的线性范围为2.91×10^(-6)~1.83×10^(-2)mol·L^(-1),检出限和灵敏度分别为9.90×10^(-7)mol·L^(-1)(S/N=3)和112.5μA·(mmol·L^(-1))^(-1).此外,该传感器还具有良好的重现性和选择性.With a glassy carbon electrode (GCE) as the substrate, the poly(3,4-ethylenedioxythiophene) (PEDOT) film electrode was prepared through the electrochemical polymerization method, then a novel non-enzymatic electrochemical H202 sensor was fabricated by co-immobilizing phosphomolybdic acid and graphene with Nation on the PEDOT/GCE electrode. The modified electrodes were characterized by scanning electron microscopy (SEM), while the responsive properties of the sensor to H202 were investigated by cyclic voltammetry and chronoamperometry. The results demonstrated that, under the optimized conditions, the sensor exhibited good electrocatalytic performance for H2O2 reduction. The current response of the sensor was linear to the H2O2 concentra tion in the range of 2.91 × 10-6 - 1.83 × 10-2 mol. L-1with the detection limit and sensitivity being 9.90×10.7 mol. L-1 (S/N = 3) and 112.5 μA. (mmol. L-1)-1, respectively. Moreover, the sensor also exhibited excellent reproducibility and selectivity.
关 键 词:电化学H2O2传感器 聚3 4-乙烯二氧噻吩 磷钼酸 石墨烯
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.3