Synthesis of FeOOH@PDA-Ag nanocomposites and their application for electrochemical sensing of hydrogen peroxide
A well-dispersed Ag nanoparticle (Ag NP) anchored on rod-like Ferric oxyhydroxide@polydopamine (FeOOH@PDA) electrocatalyst was achieved via in situ reduction at room temperature.The obtained FeOOH@PDA-Ag nanocomposites were used for fabricating a novel non-enzymatic H2O2 sensor.The relationship between the sensing interface material and the sensor performance was studied,and a new method for the detection of H2O2was established.The composition and morphology of the nanocomposites were characterized by transmission electron microscopic (TEM),X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS),which indicated that large numbers of Ag NPs with a narrow size were uniformly distributed on the surface of FeOOH@PDA.The electrochemical investigation showed that the nanocomposites had excellent electrocatalytic property toward the reduction of H2O2,and the sensor displayed a linear response to H2O2 in the range of 7.5 μM- 18.8 mM with a detection limit of 2.5 μM at a signal-to-noise ratio of 3 and a sensitivity of 11.8 μAm M-1 cm-2.Compared with other non-enzymatic H2O2 sensors,the linear range of this sensor improved one order of magnitude.Moreover,the good analytical performance,low cost and facile preparation method made this novelmaterial a promising candidate for the development of effective non-enzymatic H2O2 sensor.
Non-enzymatic sensor Silver nanoparticles Ferric oxyhydroxide Polydopamine Hydrogen peroxide
Ning Zhang Qinglin Sheng Yuanzhen Zhou Sheying Dong Jianbin Zheng
Institute of Analytical Science,Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry,Nor School of Science,Xian University of Architecture and Technology,Xian 710055,China
国际会议
南京
英文
315-321
2016-12-23（万方平台首次上网日期，不代表论文的发表时间）