全文下载:2013010001
王伟娜, 万均*
(青岛科技大学 化学与分子工程学院,山东 青岛 266042)
摘要: 以 50 μm的银丝为模板,利用恒电位电化学沉积方法制备了一种新型的纳米铂/金管状电极,利用纳米金和铂对过氧化氢的催化氧化,制备无酶过氧化氢传感器。应用场发射扫描电镜(SEM)和X射线能谱(XPS)对其形貌进行了表征,并对制备条件进行了优化。利用微分脉冲伏安法(DPV)对过氧化氢浓度进行了检测,在2.0 × 10-6 ~ 2.0× 10-5 mol·L-1范围内氧化峰电流与过氧化氢浓度成线性关系,线性回归方程为I(μA)= 1.262 1c (mol·L-1) + 8.160 5 (n=6,r=0.995),信噪比为3σ时,检测限为9.04 × 10-7 mol·L-1。
关键词: Pt/Au管状微电极; 电沉积; 无酶过氧化氢传感器
中图分类号:O 617文献标志码: A
Preparation of a New Pt/Au Tubular Electrode and Its Electrochemical Studies for H2O2 Sensor
WANG Wei-na, WAN Jun
(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology,Qingdao 266042,China)
Abstract: With 50 μm diameter of silver ware as a template, the constant potential electrochemical deposition method was used to prepare a new type of Pt/Au tubular electrode. Because of the platinum nanoparticles and gold nanoparticles on the catalytic hydrogen peroxide oxidation, the tubular electrode was used as nonenzyme hydrogen peroxide sensor. Its apparent morphology was characterized by SEM and X-ray spectroscopy and its preparation conditions were optimized by electrochemical methods. The as-prepared electrode showed a super stabilization to H2O2, with a linear range of 2.0 × 10-6 mol·L-1—2.0× 10-5 mol·L-1 and a detection limit of 9.04 × 10-7 mol·L-1 according to 3σ rule.
Key words: Pt/Au tubular micro-electrode; electrodeposition; nonenzyme hydrogen peroxide sensor
收稿日期:2012-03-15
基金项目: 国家自然科学基金项目(21105053).
作者简介: 王伟娜(1987—),女,硕士研究生.*通信联系人.