A novel formaldehyde sensor containing AgPd alloy nanoparticles electrodeposited on an ionic liquid-chitosan composite film

被引：41
作者：
Wang, Qi [1 ,2 ]
Zheng, Jianbin [1 ]
Zhang, Hongfang [1 ]
机构：
[1] NW Univ Xian, Inst Analyt Sci, Shaanxi Prov Key Lab Electroanalyt Chem, Xian 710069, Peoples R China
[2] Xidian Univ, Sch Sci, Xian 710071, Peoples R China
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2012年 / 674卷
基金：
中国国家自然科学基金;
关键词：
Sensor; Electrocatalysis; AgPd alloy; Ionic liquid; Formaldehyde; ELECTROCATALYTIC ACTIVITY; OXYGEN REDUCTION; BIOSENSOR; CATALYSTS; METHANOL; ELECTROOXIDATION; OXIDATION; ETHYLENE; DESIGN; SILVER;
D O I：
10.1016/j.jelechem.2012.02.009
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A novel formaldehyde (HCHO) sensor fabricated by electrodeposition of AgPd alloy nanoparticles (NPs) on chitosan (Ch)-ionic liquid (IL, i.e., 1-octyl-3-methylimidazolium hexafluorophosphate, OMIM-PF6) films is developed. A scanning electron micrograph of the AgPd/Ch-IL composite film shows a uniform distribution of spherical AgPd NPs with particle sizes of 30-60 nm. Energy-dispersive X-ray measurements indicate that the mass ratio of Pd and Ag in the alloy is 21:5. Cyclic voltammetric studies show that an electrode coated with the AgPd/Ch-IL composite film exhibits high electrocatalytic activity and stability towards electrooxidation of HCHO. The HCHO sensor exhibits linear behavior in the concentration range from 0.060 mM to 20 mM, allowing quantitative analysis of HCHO with a detection limit of 0.022 mM (S/N = 3). (C) 2012 Elsevier B.V. All rights reserved.
引用
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页码：1 / 6
页数：6
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