Nanoporous Carbon Nanofibers Decorated with Platinum Nanoparticles for Non-Enzymatic Electrochemical Sensing of H2O2

Abstract

Abstract:We describe the preparation of nanoporous carbon nanofibers (CNFs) decorated with platinum nanoparticles (PtNPs) in this work by electrospining polyacrylonitrile (PAN) nanofibers and subsequent carbonization and binding of PtNPs. The fabricated nanoporous CNF-PtNP hybrids were further utilized to modify glass carbon electrodes and used for the non-enzymatic amperometric biosensor for the highly sensitive detection of hydrogen peroxide (H2O2). The morphologies of the fabricated nanoporous CNF-PtNP hybrids were observed by scanning electron microscopy, transmission electron microscopy, and their structure was further investigated with Brunauer-Emmett-Teller (BET) surface area analysis, X-ray photoelectron spectroscopy, X-ray diffraction, and Raman spectrum. The cyclic voltammetry experiments indicate that CNF-PtNP modified electrodes have high electrocatalytic activity toward H2O2 and the chronoamperometry measurements illustrate that the fabricated biosensor has a high sensitivity for detecting H2O2. We anticipate that the strategies utilized in this work will not only guide the further design and fabrication of functional nanofiber-based biomaterials and nanodevices, but also extend the potential applications in energy storage, cytology, and tissue engineering. OPEN ACCESSNanomaterials 2015, 5 1892

Electrical conductivity of silver nanoparticle doped carbon nanofibres measured by CS-AFM

“…One effective approach to enhance the electrochemical properties and enlarge the reactive surface area of CNFs is to incorporate metal nanoparticles into polyacrylonitrile bres. [25][26][27][28] This approach has attracted much attention due to the large interfacial area as well as the synergistic effect of the resulting nanocomposites. In this context, it is well known that silver nanoparticles (AgNPs) possess interesting catalytic and electrochemical properties, and thus materials containing silver are promising candidates in many scienctic activities.…”

Single step additive manufacturing (3D printing) of electrocatalytic anodes and cathodes for efficient water splitting

“…1360 and 1589 cm À1 , respectively. 35,36 The D and G vibrational bands are both indicative of sp 3 hybridisation in the activated carbon support of the Pt/C or Super P. 37 The presence of a Pt signal is evident by the lack of a strong 2D band usually observed at ca. 2680 cm À1 as observed in the Super P spectra, moreover, the Pt/C spectrum displays a broad band between 2600-2950 cm À1 , this suggests the presence of Pt nanoparticles has led to a signicant reduction in the 2D band.…”

Flow Injection Amperometric Analysis of H2O2 at Platinum Nanoparticles Modified Pencil Graphite Electrode

“…Therefore, many scientists have focused on the development of a new method for simple, fast, cheap, selective, sensitive accurate and reliable detection of H 2 O 2 [11‐45]. For this, various useful methods such as spectrophotometric , fluorimetric , chemiluminometric and electroanalytical methods have been proposed for H 2 O 2 determination. Among those, electroanalytical methods have found great attention due to its high sensitivity, ease of operation, and low cost .…”

“…For this, various useful methods such as spectrophotometric , fluorimetric , chemiluminometric and electroanalytical methods have been proposed for H 2 O 2 determination. Among those, electroanalytical methods have found great attention due to its high sensitivity, ease of operation, and low cost . Recently electrocatalytic determination of H 2 O 2 based on its reduction and also oxidation has been widely studied using various types of modified electrodes .…”