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方波脉冲法制备Cu2O@Cu/TiO2三维阵列纳米复合材料及其作为高灵敏无酶型葡萄糖传感器的研究
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关高明,柯汝丹,邱燕璇,黎秀镇,谢思怡,刘江帆,蒋辽川 广东第二师范学院化学系 
基金项目:广东省自然科学基金项目(2015A030313841);攀登计划项目(pdjh2020b0429);大学生创新创业训练计划项目(S201914278034,201914278105,201914278106 )
中文摘要:采用阳极氧化法制备了TiO2三维阵列纳米管(TiO2 NTAs),再利用方波脉冲法在TiO2 NTAs表面电沉积Cu薄膜,经过煅烧处理后得到Cu2O@Cu/TiO2 NTAs纳米复合材料。X-射线衍射仪(XRD)测试表明该材料中Cu和Cu2O共存。扫描电镜(SEM)和透射电镜(TEM)分析显示,TiO2管壁的外表面均匀生长Cu2O,选区电子衍射结果表明该纳米复合材料为混晶材料。差分脉冲伏安法表明,Cu2O@Cu/TiO2 NTAs在+0.56 V处出现明显的葡萄糖氧化峰,表明该纳米复合材料对葡萄糖具有强的电催化作用,可用于葡萄糖的测定。计时电流法得到葡萄糖的线性范围为0.19~3.5 mmol/L,灵敏度为372.0 μA·L·mmol-1·cm-2,检出限为3 μmol/L。交流阻抗测得Cu2O/TiO2 NTAs的传荷阻抗为526.2 Ω,Cu2O@Cu/TiO2 NTAs为1.8 Ω,二者相差292倍,说明Cu作为中间过渡层降低了电子传导的传荷阻抗。将该电极用于血清中葡萄糖含量的检测,测试结果与医院测定结果无显著差异。Cu2O@Cu/TiO2 NTAs可作为一种灵敏度高、响应速度快、选择性较好的无酶型葡萄糖传感器。
中文关键词:氧化亚铜(Cu2O)  三维阵列  脉冲电沉积  葡萄糖传感器
 
Fabrication of a Sensor Based on Three-dimensional Cu2O@Cu/TiO2 Nanocomposites by Square Wave Pulse Method and Its High Sensitive Detection of Enzyme free Glucose
Abstract:A sensor for the detection of enzyme free glucose was fabricated with three dimensional Cu2O@Cu/TiO2 NTAs nanocomposites.Firstly,the three dimensional TiO2 nanotube arrays(TiO2 NTAs) were prepared by anodizing,and then a Cu film was electrodeposited on the surface of TiO2 NTAs by square wave pulse method.After calcination,the Cu2O@Cu/TiO2 NTAs nanocomposites were prepared.Results of X-ray diffractometer showed that Cu and Cu2O coexisted in the material.Combined with the analysis of SEM and TEM,Cu2O was uniformly grown on the outer surface of TiO2 tube wall,and the results of selected area electron diffraction displayed that the material presented a mixed crystal structure.The differential pulse voltammetry(DPV) showed that the oxidation peak of Cu2O@Cu/TiO2 NTAs was obvious at +0.56 V,indicating that the nanocomposite has strong electrocatalytic effect for glucose and could be used to detect it.There was a linear relationship of the method for glucose in the range of 0.19-35 mmol/L,with a sensitivity of 372.0 μA·L·mmol-1·cm-2 and a detection limit of 3 μmol/L.The electrochemical impedance exhibited that charge transfer resistance of Cu2O/TiO2 NTAs was 526.2 Ω,which was 292 times higher than that of Cu2O@Cu/TiO2 NTAs(merely 1.8 Ω).It displayed that Cu as the middle transition layer reduced the electronic conduction impedance.The sensor was used for the determination of glucose in serum sample.There was no significant difference between the results of the test and those of the hospital.Cu2O@Cu/TiO2 NTAs could be used as an enzyme free glucose sensor with its high sensitivity,fast response and good selectivity.
Key Words:cuprous oxide(Cu2O)  three dimensional arrays  pulse electrodeposition  glucose sensor
引用本文:关高明,柯汝丹,邱燕璇,黎秀镇,谢思怡,刘江帆,蒋辽川.方波脉冲法制备Cu2O@Cu/TiO2三维阵列纳米复合材料及其作为高灵敏无酶型葡萄糖传感器的研究[J].分析测试学报,2020,39(7):860-866.
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