基于雪花形状的金纳米结构的抗坏血酸传感器的研究  

A novel Ascorbic Acid Sensor Based Snow-shaped Au Nanostructure

作　　者：陈润康 莫平菁 黄安旗 李素 张敏 张燕[3] 程发良 

机构地区：[1]东莞理工学院生态环境与建筑工程学院,广东东莞523808 [2]广东省新型纳米材料工程技术研究中心,广东东莞523808 [3]东莞理工学院城市学院城市与环境科学系,广东东莞523419

出　　处：《广东化工》2017年第21期35-37,共3页Guangdong Chemical Industry

基　　金：国家自然科学基金项目(No.21375016;21475022;21505019)资助;广东省重点平台与高校重大科研项目(No.2014KZDXM073;2014KTSCX181;2015KCXTD029;2016KQNCX219);东莞市社会科技发展一般项目(2017507151065);东莞理工学院大学生创新训练项目(201611819164)

摘　　要：本文利用一步合成装技术在碳纸表面合成雪花片形状的金(Au)纳米结构通过控制聚乙烯亚胺和Au纳米颗粒的浓度和反应时间。利用聚乙烯亚胺上的N与Au形成N-Au纳米颗粒组装成雪花形状Au纳米结构。用扫描电镜来表征雪花形状Au纳米结构的形貌,Au纳米结构很均匀的分散在碳纸表面,并不存在大的团聚。电化学技术(循环伏安法和计时电流分析法)检测雪花形状Au纳米结构对抗坏血酸的响应情况,显示修饰电极对抗坏血酸有很好的响应,在抗坏血酸浓度1×10^(-6)~1.15×10^(-4) mol/L的范围内,氧化电流与其浓度存在线性关系(R=0.998),检测限为6×10^(-7) mol/L;另外传感器具有很好的稳定性和选择性,为小分子污染物的检测提供新方法。We develop a simple and convenient hydrothermal method for fabricating snow-shaped Au nanostructure by controlling the concentration of Polyethyleneimine （PEI）, the source gold electrolyte and the reaction time. The snow-shaped Au nanostructure was self-assembled via forming N-Au bond by Au nanoparticles and -NH2 on PEI. The morphology of the snowflakes Au nanostructure is characterized by scanning electron microscopy and X-ray diffrcaction, respectively. The snow-shaped Au nanostructure is uniformity dispersed on carbon paper and non-existent rally. The snowflakes Au nanostructure was employed as sensing material for the detection of Ascorbic Acid. Under the optimal experimental conditions, the as-prepared biosensor shows extremely high catalytic performance for the oxidation for Ascorbic Acid with a liner range of 1-115μM and a low detection limit of 0.6μM. In addition, the as-produced sensor also exhibits good selectivity and reproducibility. This novel nanostructure provides a simple and feasible approach for the novel nanostructure sensor broadens the application of Ascorbic Acid detection.

关 键 词：雪花形状 Au纳米结构 抗坏血酸 传感器 

分 类 号：TQ[化学工程]