A novel non-enzyme hydrogen peroxide sensor based on catalytic reduction property of silver nanowires

Xia Qin; Huicai Wang; Zhiying Miao; Junli Li; Qiang Chen

doi:10.1016/j.talanta.2015.02.037

A novel non-enzyme hydrogen peroxide sensor based on catalytic reduction property of silver nanowires

Talanta. 2015 Jul 1:139:56-61. doi: 10.1016/j.talanta.2015.02.037. Epub 2015 Feb 26.

Authors

Xia Qin¹, Huicai Wang², Zhiying Miao³, Junli Li⁴, Qiang Chen⁵

Affiliations

¹ School of Geography and Tourism, Qufu Normal University, Rizhao 276826, China; The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Tianjin 300071, China.
² State Key Laboratory of Hollow Fiber Membrane Materials and Process, Tianjin Polytechnic University, Tianjin 300160, China. Electronic address: wanghuicai@tjpu.edu.cn.
³ The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Tianjin 300071, China.
⁴ School of Geography and Tourism, Qufu Normal University, Rizhao 276826, China.
⁵ The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Tianjin 300071, China. Electronic address: qiangchen@nankai.edu.cn.

PMID: 25882408
DOI: 10.1016/j.talanta.2015.02.037

Abstract

A novel strategy to fabricate a hydrogen peroxide (H2O2) sensor was developed based on silver nanowires modified Pt electrode. The sensor was fabricated by simple casting of silver nanowires (Ag NWs) aqueous solution on a Pt electrode. Silver nanowires were synthesized by an l-cysteine-assisted poly (vinyl pyrrolidone) (PVP)-mediated polyol route. UV-vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to investigate the prepared nanowires. The electrochemical properties of H2O2 sensor were evaluated by cyclic voltammetry (CV) and chronoamperometry. The as-obtained silver nanowires exhibited favorable electroreduction activity toward H2O2, and results indicated that the Ag NWs modified Pt (Ag NWs/Pt) electrode might be gifted from CV scanning with higher surface area and more active sites that afford more effective surface exposure in the electrode-electrolyte interface and consequently improved electrochemical properties. At the applied potential of -0.2V vs. Ag/AgCl, the Ag NWs/Pt electrode as an enzyme-free sensor exhibited a wide linear range of 0.5μM-30mM to H2O2, with a remarkable sensitivity of 9.45μA/mM, a detection limit of 0.2μM estimated at a signal-to-noise ratio of 3 and fast response time (within 5s). Moreover, it showed good reproducibility, anti-interferant ability and long-term stability. The excellent performance of the sensor might be attributed to the well-defined silver nanowires with special catalytic activity.

Keywords: Electroreduction; Hydrogen peroxide; Non-enzyme; Silver nanowires.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Biosensing Techniques
Catalysis
Electrochemical Techniques / methods
Electrodes*
Hydrogen Peroxide / chemistry*
Limit of Detection
Metal Nanoparticles / chemistry*
Microscopy, Electron, Scanning
Microscopy, Electron, Transmission
Nanowires / chemistry*
Reproducibility of Results
Signal-To-Noise Ratio
Silver / chemistry*
X-Ray Diffraction

Substances

Silver
Hydrogen Peroxide