基于雪花形状的金纳米结构的亚硝酸盐传感器的研究  

A novel NO2- sensor based on snow-shaped Au nanostructure

作　　者：张燕[1] 陈妹琼[1] 蔡志泉[1] 张敏 柳鹏 程发良 ZHANG Yan;CHEN Mei-qiong;CAI Zhi-quan;ZHANG Min;LIU Peng;CHENG Fa-liang(Department of City and Environmental Sciences, College of Science and Technology of Dongguan of City College, Dongguan 523419;Guangdong Engineering and Technology Research Center for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808)

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

出　　处：《分析试验室》2019年第6期655-659,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金项目(21375016,21475022,21505019);广东省自然科学基金项目(2015A030310272);广东省科技计划项目(No.2015B090927007);广东省重点平台与高校重大科研项目(2014KZDXM073,2014KTSCX181,2015KCXTD029,2016KQNCX219);东莞市社会科技发展一般项目(2017507151065)资助

摘　　要：通过控制聚乙烯亚胺和Au纳米颗粒的浓度和反应时间,利用一步合成组装技术在碳纸表面合成雪花片形状的金(Au)纳米结构。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。电化学技术检测雪花形状Au纳米结构对亚硝酸离子的响应情况,数据显示修饰电极对亚硝酸离子有很好的响应,在亚硝酸离子浓度5~163μmol/L范围内,氧化电流与其浓度存在线性关系(R^2=0. 997),检测限为1. 67μmol/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。One step hydrothermal method was developed for fabricating snow-shaped Au nanostructure by controlling the concentration of polyethyleneimine( PEI),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 was characterized by scanning electron microscopy and X-ray diffraction, respectively. The snow-shaped Au nanostructure is uniformity dispersed on carbon paper and non-existent rally. The snow-shaped Au nanomaterial was employed as sensing material for the detection of NO2^- . The as-prepared biosensor showed extremely high catalytic performance for the oxidation of NO2^- with a liner range of 5-163 μmol/L and a low detection limit of 1. 67 μmol/L. In addition,the as-produced sensor also exhibited good selectivity and reproducibility. This novel nanostructure provided a simple and feasible approach for the application of NO2- detection.

关 键 词：雪花形状Au纳米结构 亚硝酸盐 传感器 

分 类 号：TS207.3[轻工技术与工程—食品科学]